CN113549777A - Device and method for reducing arsenic content of rock - Google Patents
Device and method for reducing arsenic content of rock Download PDFInfo
- Publication number
- CN113549777A CN113549777A CN202110899901.9A CN202110899901A CN113549777A CN 113549777 A CN113549777 A CN 113549777A CN 202110899901 A CN202110899901 A CN 202110899901A CN 113549777 A CN113549777 A CN 113549777A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- water
- rock
- dearsenification
- jar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The application discloses reduce device of rock arsenic content, the device is including the dearsenification jar, be formed with the dearsenification pond in the dearsenification jar, and be equipped with water-soluble arsenic ability promotion piece for the ability of dissolving arsenic of promotion water, be provided with the water inlet on the dearsenification jar, the water inlet with the dearsenification pond is located respectively the both sides of water-soluble arsenic ability promotion piece, the rock holding is in the dearsenification pond, and water gets into the dearsenification jar through the water inlet to in getting into the dearsenification pond after the promotion of water-soluble arsenic ability, with the rock contact and dissolve the arsenic in the rock. The application discloses installed water-soluble arsenic ability in the dearsenification jar of device and promoted the piece, water-soluble arsenic ability promotes the ability that can promote the dissolved arsenic of water, makes the adsorbed arsenic of rock surface more easily by desorption migration to aquatic. In addition, the application also provides a method for reducing the arsenic content of the rock.
Description
Technical Field
The application relates to the technical field of trace element removal, in particular to a device and a method for reducing arsenic content in rock.
Background
The water purifier is also called water purifier and water quality purifier, and is water treatment equipment for deeply filtering and purifying water according to the use requirement of water. Most of the existing water purifiers use reverse osmosis or nanofiltration technology, which can remove almost all pollutants in drinking water, but reduce the content of minerals such as calcium, magnesium and the like in the water while removing the pollutants. Long-term drinking of low mineral water can make it difficult to obtain enough mineral elements to maintain metabolic balance in the body, and therefore Rosborg et al propose that drinking water with low mineralization should be remineralized.
At present, natural rock materials are increasingly used as mineralized materials for water purifiers. However, many natural rocks are intergrown with arsenic-containing minerals during diagenesis, for example, higher levels of arsenic are detected in some arsenic-containing sulfide minerals, chlorite, biotite, and iron-containing silicate minerals. Particularly, because the Fe/Mn oxide mineral has strong affinity to arsenic, the natural rock containing Fe and/or Mn also has high content of arsenic, and therefore, the phenomenon that the arsenic exceeds the standard can occur in the soaking process of the natural rock mineralized material.
Arsenic and its compounds are known to be toxic and therefore arsenic poisoning occurs when the human body has an excessive intake of arsenic, generally inorganic arsenic is more toxic than organic arsenic and trivalent arsenic is more toxic than pentavalent arsenic. Excessive arsenic can interfere with normal metabolism of cells, affect respiration and oxidation processes, and cause pathological changes to cells. However, at present, the research on arsenic removal technology for geological materials such as rock and soil is less, and no better technical means is available for reducing the content of arsenic in the geological materials, which is also a technical bottleneck for applying the geological materials to water mineralization.
Disclosure of Invention
In view of the above, the present application provides an apparatus for reducing arsenic content in rock, which aims to reduce arsenic content in rock.
The embodiment of this application is realized like this, a reduce device of rock arsenic content, the device is including the dearsenification jar, be formed with the dearsenification pond in the dearsenification jar to and be equipped with water-soluble arsenic ability promotion piece, be provided with the water inlet on the dearsenification jar, the water inlet with the dearsenification pond is located respectively the both sides of water-soluble arsenic ability promotion piece, the rock holding is in the dearsenification pond, water gets into the dearsenification jar through the water inlet to in getting into the dearsenification pond after promoting the arsenic ability of dissolving through water-soluble arsenic ability promotion piece, with the rock contact and dissolve the arsenic in the rock.
Optionally, in some embodiments of the present application, the water soluble arsenic capacity enhancer comprises a substance capable of weakly alkalizing water and/or a substance capable of reducing the oxidation-reduction potential of water.
Optionally, in some embodiments of the present application, two arsenic-dissolving capacity increasing members are installed in the arsenic removal tank, wherein one arsenic-dissolving capacity increasing member contains a substance capable of weakly alkalizing water, and the other arsenic-dissolving capacity increasing member contains a substance capable of reducing the oxidation-reduction potential of water.
Optionally, in some embodiments of the present application, the weakly alkalizing water substance is at least one of limestone, calcite, dolomite, and aragonite; and/or
The substance capable of reducing oxidation-reduction potential of water is at least one selected from tourmaline and magnesium.
Optionally, in some embodiments of this application, the device still includes arsenic recovery jar, first pipeline and second pipeline, be provided with arsenic adsorption member in the arsenic recovery jar, arsenic adsorption member is retrieved jar interval into high arsenic district and low arsenic district with arsenic, dearsenization jar dearsenization pond with arsenic is retrieved jar high arsenic district and is passed through first pipeline intercommunication, dearsenization jar with arsenic is retrieved jar low arsenic district and is passed through the second pipeline intercommunication, just the second pipeline with dearsenization jar meet the department with dearsenization pond is located respectively the both sides of water-soluble arsenic ability promotion piece, the water that is dissolved in the dearsenization pond has arsenic warp first pipeline gets into the high arsenic district in the arsenic recovery jar, the water warp in the low arsenic district of arsenic recovery jar enters into in the dearsenization jar.
Optionally, in some embodiments of the present application, the arsenic adsorbing member comprises an arsenic adsorbable material, and the arsenic adsorbable material is at least one of siderite, hematite, rhodochrosite and manganite.
Optionally, in some embodiments of the present application, the second pipeline is provided with a circulation pump for providing power to convey water in the low-arsenic region into the arsenic removal tank via the second pipeline; and/or
And the second pipeline is provided with a deoxidizing part for removing oxygen in water.
Optionally, in some embodiments of this application, install heating rod and temperature sensor on the jar wall of dearsenification jar, heating rod and temperature sensor are connected with the singlechip, the heating rod is used for heating the water in the dearsenification jar, temperature sensor is used for monitoring the temperature and feeds back the monitoring result to the singlechip, the singlechip is used for predetermineeing temperature control according to the heating rod heating water in the dearsenification jar.
Optionally, in some embodiments of the present application, an isolation layer is further disposed in the arsenic removal tank, and the isolation layer is disposed between the water-soluble arsenic capacity improving member and the arsenic removal tank; and/or
At least two interlayers are further arranged in the arsenic removal tank, and interlayers are arranged between the two water-soluble arsenic capacity promoting pieces and between the water-soluble arsenic capacity promoting pieces and the arsenic removal tank.
Optionally, in some embodiments of the present application, the apparatus further includes a pickling tank, a pickling solution is added to the pickling tank, and the rock is first put into the pickling tank, and then put into the arsenic removal tank after being pickled by the pickling solution.
Correspondingly, the application also provides a method for reducing the arsenic content of the rock, which comprises the following steps:
step S1: providing a rock;
step S2: preparing water with weak alkalinity and/or reducibility; and
step S3: soaking the rock in the water with weak alkalinity and/or reducibility.
Alternatively, in some embodiments herein, the pH of the weakly alkaline water is in the range of 9-13; and/or
The redox potential of the reducing water ranges from-400 to-50; and/or
The soaking temperature is 60-80 ℃; and/or
The volume ratio of the rock to the water having weak alkalinity and/or reducibility ranges from (1: 2) to (5: 2).
Alternatively, in some embodiments of the present application, the method for preparing water having weak alkalinity is: contacting the water with a weakly alkalinizable water substance; and/or
The method for preparing the water with reducibility comprises the following steps: the water is contacted with a substance that reduces the oxidation-reduction potential of the water.
Optionally, in some embodiments of the present application, the weakly alkalizing water substance is at least one of limestone, calcite, dolomite, and aragonite; and/or
The substance capable of reducing oxidation-reduction potential of water is at least one selected from tourmaline and magnesium.
Optionally, in some embodiments of the present application, before the step S3, a step of pickling the rock with a pickling solution is further included, wherein a volume ratio of the rock to the pickling solution is in a range of 1: (10-100).
Optionally, in some embodiments of the present application, after the step S3, the method further includes:
step S4: and dearsenifying, separating the soaked water from the rock, and then contacting the separated water with a material capable of adsorbing arsenic, wherein the material capable of adsorbing arsenic is at least one of siderite, hematite, rhodochrosite and manganite.
Optionally, in some embodiments of the present application, the step of contacting the separated water with the arsenic-adsorbable material further comprises adding acid and/or introducing oxygen to the water.
Optionally, in some embodiments of the present application, the method further includes:
and (4) preparing the water after dearsenification into water with weak alkalinity and/or reducibility again, and repeating the steps S2, S3 and S4 until the arsenic content in the rock reaches a preset threshold value.
Optionally, in some embodiments of the present application, the method is performed in the above-described apparatus.
The application has at least the following beneficial effects:
the application discloses reduce water-soluble arsenic ability promotion piece has been installed in dearsenification jar of device of rock arsenic content, but contain the material of weak alkalization water and/or the material that can reduce the redox potential of water in the water-soluble arsenic ability promotion piece, water can be by weak alkalization and/or reduction after dearsenification piece, turns into to have weak alkaline and/or reductive water. The water having weak alkalinity can make arsenic adsorbed on the surface of the rock more easily desorbed into water. And the negative ions in the weakly alkaline water and the oxyanions of arsenic have competitive adsorption on the surface of the rock, so that part of the arsenic originally adsorbed on the rock is released into the water. The water with reducibility can make iron oxide, manganese oxide and/or iron manganese oxide containing arsenic in the rock of Fe and/or Mn undergo reducibility dissolution, thereby releasing arsenic into the water. And the adsorbed arsenic As (V) in the rock under the reducing environment can be reduced into As (III) with stronger migration capability, so that more arsenic is desorbed and migrates into water.
The utility model provides an install heating rod and temperature sensor on the dearsenification jar of the device of reduction rock arsenic content, can be with the temperature control in the dearsenification jar in certain within range to do benefit to arsenic desorption to aquatic in the rock.
The device that reduces rock arsenic content includes the pickling bath for the pickling rock, so, can weaken the ability that Fe and/or Mn adsorbed arsenic in the rock, further improve the dearsenification effect.
The device of this application reduction rock arsenic content includes arsenic recovery pond and circulating pump, can adsorb the arsenic of the aquatic that has arsenic to dissolve on the arsenic adsorbed layer to make the water among the device circulate by used repeatedly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an apparatus for reducing arsenic content of rock according to an embodiment of the present application;
FIG. 2 is a flow chart of the method of reducing arsenic content of rock shown in FIG. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or an established order. Various embodiments of the invention may exist in a range of forms; it is to be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges such as, for example, from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as individual numbers within a range such as, for example, 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the indicated range.
Referring to fig. 1, the present application provides an apparatus 100 for reducing arsenic (As) content in rock, which is used for reducing or even removing arsenic content in rock.
In an embodiment, the rock is a Fe and/or Mn containing rock. The Fe and/or Mn containing rock may be, but is not limited to, at least one of celestite, medical stone, zeolite, and siderite.
The device 100 for reducing the arsenic content in rock comprises a pickling tank 10, an arsenic removal tank 20, an arsenic recovery tank 30 and a first pipeline 40 for communicating the arsenic removal tank 20 with the arsenic recovery tank 30. The first pipe 40 is respectively communicated with the arsenic removal tank 20 and the arsenic recovery tank 30.
The pickling tank 10 is provided with a feeding port 11 and a waste water port 12. The pickling tank 10 is added with a pickling solution for pickling the rock, which can weaken the arsenic adsorption capacity of substances in the rock, such as Fe and/or Mn. The pickling solution may be, but is not limited to, citric acid, as long as the ability of the substances in the rock, such as Fe and/or Mn, to adsorb arsenic may be reduced. It is understood that the pickling solution may further contain deionized water.
The top of the dearsenification tank 20 is provided with a water inlet 201 and an overflow port 202. The height of the overflow 202 is lower than that of the inlet 201. Water enters the inside of the dearsenification tank 20 through the water inlet 201. When water is supplied to the dearsenification tank 25 through the water inlet 201 and water overflows from the overflow port 202, the water supply is stopped and the water inlet 201 and the overflow port 202 are closed, indicating that the dearsenification tank 20 is filled with water.
The dearsenification tank 20 is internally provided with a dearsenification pool 21 and a water-soluble arsenic capacity lifting piece 2. The water soluble arsenic capacity improving piece 2 comprises a first water soluble arsenic capacity improving piece 22 and a second water soluble arsenic capacity improving piece 23. The first water-soluble arsenic capacity improving piece 22 is positioned above the second water-soluble arsenic capacity improving piece 23, and the second water-soluble arsenic capacity improving piece 23 is positioned above the arsenic removal tank 21. The rock or acid-washed rock is added to the dearsenification cell 21. After entering the dearsenification tank 20 through the water inlet 201 of the dearsenification tank 20, the water sequentially passes through the first water-soluble arsenic capacity improving member 22 and the second water-soluble arsenic capacity improving member 23 and enters the dearsenification tank 21.
The water inlet 201, the overflow port 202 and the arsenic removal tank 21 are respectively positioned at two sides of the water-soluble arsenic capacity improving member 2.
In at least one embodiment, the first water soluble arsenic promoting component 22 is disposed on the top of the arsenic removing tank 20 and attached to the top of the arsenic removing tank 20. It will be appreciated that in other embodiments the first water soluble arsenic promoting means 22 may be spaced from the top of the dearsenification tank 20.
In one embodiment, the first water soluble arsenic capacity enhancer 22 comprises a substance capable of weakly alkalizing water, and the second water soluble arsenic capacity enhancer 23 comprises a substance capable of reducing the oxidation-reduction potential (Eh) of water. The water entering the dearsenification tank 20 is weakly alkalized by the first water-soluble arsenic capacity promoting piece 22, then reduced by the second water-soluble arsenic capacity promoting piece 23 to become water with alkalescence and reducibility, and then enters the dearsenification tank 21 to generate water-rock action with rocks, so that arsenic in the rocks is desorbed (desorbed) into the water.
In a further embodiment, the first water soluble arsenic capacity enhancer 22 comprises a substance that can reduce the oxidation-reduction potential of water, and the second water soluble arsenic capacity enhancer 23 comprises a substance that can weakly alkalize water. The water entering the dearsenification tank 20 is reduced by the first water-soluble arsenic capacity improving member 22, is weakly alkalized by the second water-soluble arsenic capacity improving member 23 to become water with alkalescence and reducibility, and then enters the dearsenification tank 21 to have a water-rock effect with rocks, so that the arsenic in the rocks is desorbed into the water.
The material capable of weakly alkalizing water is calcium carbonate (CaCO)3). In at least one embodiment, the weakly alkalizing water substance is a rock layer containing calcium carbonate. The calcium carbonate-containing rock layer may contain, but is not limited to, at least one of limestone, calcite, dolomite, and aragonite. When water passes through the substance capable of weakly alkalifying water, water and CO dissolved in water2Reacting with limestone to produce HCO3 -(bicarbonate) so that the pH of the water rises to 9-13, becoming water with weak alkalinity. The increase in pH oxidizes iron oxides, manganese oxides, and/or iron manganese in the rockThe negative charge density of the surface of the object is changed, so that the adsorption capacity of the iron oxide, the manganese oxide and/or the iron-manganese oxide on the complex anions of arsenic acid and arsenous acid in water is reduced, and therefore, the arsenic adsorbed on the surface of the iron oxide, the manganese oxide and/or the iron-manganese oxide is easily desorbed into the water under the alkaline condition. HCO in weakly basic Water3 -Has similar chemical structure characteristics with the oxyanion of arsenic, and can generate adsorption reaction on the surface of rock, HCO3 -And the arsenic-containing oxyanion and the iron oxide, manganese oxide and/or iron manganese oxide in the rock have competitive adsorption on the surface of the rock, so that the adsorption capacity of the iron oxide, manganese oxide and/or iron manganese oxide on the arsenic is reduced, and a part of the arsenic originally adsorbed on the rock is released into water.
The substance capable of lowering the oxidation-reduction potential of water may include, but is not limited to, at least one of substances capable of lowering the oxidation-reduction potential of water, such as tourmaline and magnesium. When water passes through a substance that can lower the oxidation-reduction potential of water, the oxidation-reduction potential of water is lowered, and water becomes reductive. Because the rocks containing Fe and/or Mn are stable, Fe and/or Mn exist mainly in the form of iron oxides, manganese oxides and/or iron manganese oxides, and when water is in a reducing environment, iron oxides, manganese oxides and/or iron manganese oxides containing arsenic will undergo reductive dissolution, thereby releasing arsenic into the water. In addition, the adsorbed arsenic as (v) in the rock in the reducing environment can be reduced to more mobile as (iii), so that more arsenic is desorbed and migrated into water.
It will be appreciated that in a further embodiment, only one water soluble arsenic capacity enhancing member 2 may be provided in the dearsenification tank 20, the water soluble arsenic capacity enhancing member 2 comprising one of a material that can weakly alkalify water or a material that can reduce the redox potential of water.
It will be appreciated that in other embodiments, only one water soluble arsenic raising member may be provided in the dearsenification tank 20, and the water soluble arsenic raising member may comprise both a material capable of weakly alkalifying the water and a material capable of lowering the oxidation-reduction potential of the water.
The pH value of the weakly alkaline and reducing water ranges from 9 to 13, and the oxidation-reduction potential ranges from-400 to-50.
The dearsenification tank 20 is further provided with a first interlayer 24 and a second interlayer 25. The first water soluble arsenic capacity enhancing member 22 is positioned on the first barrier layer 24, and the second water soluble arsenic capacity enhancing member 23 is positioned on the second barrier layer 25. The first barrier layer 24 is used to separate the first water soluble arsenic capacity improving member 22 from the second water soluble arsenic capacity improving member 23, so as to prevent the substances of the first water soluble arsenic capacity improving member 22 from entering the second water soluble arsenic capacity improving member 23. The second barrier 25 is used to filter the aqueous solution to prevent the substances of the second water soluble arsenic capacity enhancer 23 from entering the arsenic removal pond 21.
The first and second separation layers 24 and 25 may be filter screens, filter membranes, or porous separation layers with filter membranes inside. The filter mesh may be a stainless steel filter mesh or the like known for filtration, and the filter mesh may be a PP cotton filter mesh or the like known for filtration. In at least one embodiment, the first barrier layer 24 is a stainless steel gauze, and the second barrier layer 25 is a stainless steel porous barrier layer with a built-in PP cotton or quartz sand layer. The built-in PP cotton or quartz sand layer is used for rough filtration of the water solution passing through the second water-soluble arsenic capacity improving piece 23.
First water-soluble arsenic ability promotes piece 22, the water-soluble arsenic ability of second promotes piece 23, first interlayer 24 and second interlayer 25 and is the detachable and installs dearsenification jar 20's inside, so that first water-soluble arsenic ability promotes piece 22 reaches change when the water-soluble arsenic ability of second promotes piece 23 runs out to be convenient for change and/or wash first interlayer 24 and second interlayer 25. It will be appreciated that the second barrier 25 may also be fixedly mounted inside the dearsenification tank 20.
It will be appreciated that the rock may be added directly to the dearsenification pond 21 through the water inlet 201. At this time, when rocks need to be added into the dearsenification tank 21, the first water-soluble arsenic capacity improving member 22, the first interlayer 24, the second water-soluble arsenic capacity improving member 23 and the second interlayer 25 are sequentially removed, and after the addition is completed, the second interlayer 25, the second water-soluble arsenic capacity improving member 23, the first interlayer 24 and the first water-soluble arsenic capacity improving member 22 are sequentially installed in the dearsenification tank 20.
It will be appreciated that a charging port 203 may also be provided in the de-arsenic tank 20 for charging rock into the de-arsenic pond 21.
In at least one embodiment, the charging port 203 is disposed at the top of the dearsenification tank 20, and the first water soluble arsenic capacity improving component 22, the first barrier layer 24, the second water soluble arsenic capacity improving component 23 and the second barrier layer 25 are all detachably mounted inside the dearsenification tank 20. When loading, the first water-soluble arsenic-ability lifting member 22, the first interlayer 24, the second water-soluble arsenic-ability lifting member 23 and the second interlayer 25 need to be removed in sequence, then the rock is loaded into the dearsenification tank 21 through the loading port 203, and then the second interlayer 25, the second water-soluble arsenic-ability lifting member 23, the first interlayer 24 and the first water-soluble arsenic-ability lifting member 22 are installed in the dearsenification tank 20 in sequence.
In a further embodiment, the loading opening 203 is arranged at the side of the arsenic removing tank 20, so that when rock powder is loaded into the arsenic removing pond 21, the rock powder can be loaded directly through the loading opening 203 without dismantling the first water soluble arsenic capacity improving member 22, the first barrier layer 24, the second water soluble arsenic capacity improving member 23 and the second barrier layer 25. It is understood that the second barrier 25 may be fixedly installed inside the arsenic removing tank 20.
The tank wall of the dearsenification tank 20 is also provided with a heating rod 26 and a temperature sensor 27. The heating rod 26 and the temperature sensor 27 are connected with the singlechip 204. The heating rod 26 is used for heating water in the dearsenification tank 20, the temperature sensor 27 is used for monitoring the water temperature in the dearsenification tank 20 and feeding back a monitoring result to the single chip microcomputer 204, and the single chip microcomputer 204 is used for controlling the heating rod 26 to heat the water in the dearsenification tank 20 according to a preset temperature so as to keep the temperature in the dearsenification tank 20 within the range of 60-80 ℃. Since the arsenic is adsorbed on the surface of the iron oxide, an exothermic reaction takes place, and the temperature is maintained in the range of 60-80 c, which induces more arsenic to be desorbed from the iron and/or manganese oxide and dissolved in water.
The bottom of the dearsenification tank 20 is provided with a water outlet 205, and one end of the first pipeline 40 is installed at the water outlet 205. The water with weak alkalinity and/or reducibility dissolved with arsenic in the arsenic removal tank 21 enters the arsenic recovery tank 30 through the water outlet 205 and the first pipeline 40.
A filter element 28 is arranged at the water outlet 205 and is used for preventing the rocks in the dearsenification tank 21 from flowing out of the dearsenification tank 21 along with water. The filter element 28 may be a filter screen, a filter membrane, or a porous barrier with a filter membrane disposed therein. The filter may be a PP cotton filter. It will be appreciated that the filter 28 may be removably mounted within the dearsenification tank 20 to facilitate cleaning or replacement.
The arsenic recovery tank 30 is provided with an arsenic adsorption member 31 for adsorbing arsenic dissolved in water to remove arsenic in water. The arsenic adsorbing member 31 partitions the arsenic recovering tank 30 into a high arsenic region 301 and a low arsenic region 302. The first conduit 40 is in communication with the high arsenic zone 301.
The arsenic adsorbing member 31 contains a material capable of adsorbing arsenic. The material capable of adsorbing arsenic is not limited as long as arsenic in water can be adsorbed. In at least one preferred embodiment, the arsenic adsorbing member 31 includes siderite, hematite, rhodochrosite, and manganite.
The apparatus 100 for reducing the arsenic content of rock further comprises a second conduit 50. The second pipeline 50 is respectively communicated with the dearsenification tank 20 and the low arsenic region 302 of the arsenic recovery tank 30, and the joint of the second pipeline 50 and the dearsenification tank 20 and the dearsenification tank 21 are respectively positioned at two sides of the water-soluble arsenic capacity improving part 2.
In at least one preferred embodiment, the arsenic recovering tank 30 is further provided with a feeding port 303 for adding acid and/or introducing oxygen into the arsenic recovering tank 30, so that after the water with the arsenic dissolved therein and having weak alkalinity and/or reducibility enters the high arsenic zone 301 of the arsenic recovering tank 30 through the first pipeline 40, the pH and/or the oxidation-reduction potential of the water is adjusted, so that the water with weak alkalinity and/or reducibility is converted into water with weak acidity and/or oxidizability, thereby facilitating the transfer and adsorption of the arsenic dissolved in the water from the water to the arsenic adsorbing member 31. In one embodiment, the acid is a weak acid. The weak acid is citric acid, carbonic acid, acetic acid, etc.
The apparatus 100 for reducing the arsenic content of rock further comprises a circulation pump 60 installed on the second pipe 50. The circulation pump 60 is used to provide circulation power. Water in the high arsenic region 301 in the arsenic recovery tank 30 is subjected to arsenic absorption by the arsenic absorption member 31, enters the low arsenic region 302, and enters the arsenic removal tank 20 through the second pipeline 50 under the action of circulating power provided by the circulating pump 60.
The apparatus 100 for reducing the arsenic content of rock further comprises a deoxidizing member 70 mounted on the second pipe 50. The deoxidizing member 70 serves to remove oxygen from the water. In at least one embodiment, the deoxidizing component 70 includes a housing 71 and a deoxidizing membrane 72 disposed in the housing 71. Both ends of the deoxidizing member 70 are respectively opened with water inlets 701, and the deoxidizing member 70 is connected to the second duct 50 through the water inlets 701. The water flowing out of the arsenic recovering tank 30 enters the deoxidizing component 70, is deoxidized by the deoxidizing membrane 72, and then enters the arsenic removing tank 20 through the second pipeline 50.
It will be appreciated that in at least one preferred embodiment, the rock is formed into a powder having a particle size of 60-300 mesh and then subjected to dearsenification using the apparatus 100 for reducing arsenic content of rock. So can make the rock have great exposure area to in the improvement dearsenification efficiency, and be convenient for the powder recovery after removing the arsenic.
It will be appreciated that the apparatus 100 for reducing the arsenic content of rock of the present application may also be used to reduce the arsenic content of arsenic-bearing soils, solid waste materials and the like.
In at least one embodiment, the volume ratio of the rock powder to the pickling solution is in the range of 1: (10-100), thus, the rock powder can be ensured to have higher pickling rate, and the waste caused by excessive addition of the pickling solution can be avoided.
In at least one preferred embodiment, the water is deionized water.
When the device 100 for reducing the arsenic content of the rock is used for reducing the arsenic content of the rock:
firstly, adding rock powder into the pickling tank 10, adding a pickling solution into the pickling tank 10, soaking for 12-24h, and filtering to obtain the rock powder after pickling;
then, adding the acid-washed rock powder into a dearsenification tank 21 of a dearsenification tank 20, injecting water from a water inlet 201, starting a single chip microcomputer 204 and a circulating pump 60, enabling the water to sequentially pass through a first water-soluble arsenic capacity improving piece 22, a first interlayer 24, a second water-soluble arsenic capacity improving piece 23 and a second interlayer 25 to become water with alkalescence and reducibility, then enabling the water to enter the dearsenification tank 21, controlling a heating rod 26 by the single chip microcomputer 204 and a temperature sensor 27 to heat the water to 60-80 ℃, and enabling the water to have a water-rock effect with the rock to remove arsenic adsorbed on the surface of the rock, namely dissolving the arsenic on the surface of the rock in the water with alkalescence and reducibility;
meanwhile, when water overflows from the overflow port 202, the water inlet 201 and the overflow port 202 are closed;
adding acid and/or introducing oxygen into the arsenic recovery tank 30, enabling water with weak alkalinity and reducibility in the dearsenification pool 21 to enter a high arsenic region 301 of the arsenic recovery tank 30 through a filter 28 and a first pipeline 40, then enabling the water to enter a low arsenic region 302 after being filtered and dearsenified through an arsenic absorption layer 31, and enabling the water to become weakly acidic and/or oxidizing water under the action of the acid and/or the oxygen;
under the action of the circulating pump 60, water in the low arsenic region 302 in the arsenic recovery tank 30 enters a second pipeline 50, is deoxidized by a deoxidizing component 70 and then returns to the arsenic removal tank 20, and then enters the arsenic removal tank 21 through a first water-soluble arsenic capacity improving component 22, a first interlayer 24, a second water-soluble arsenic capacity improving component 23 and a second interlayer 25 in sequence;
and circulating for 24-48h, taking out the solution and the solid in the dearsenifying pond 21, filtering, cleaning and drying to obtain the rock powder with low arsenic content.
Referring to fig. 2, the present application further provides a method for reducing arsenic content in rock, comprising the following steps:
step S1: providing a rock;
step S2: preparing water with weak alkalinity and/or reducibility; and
step S3: soaking the rock in the water with weak alkalinity and/or reducibility.
The method for preparing the water with weak alkalinity comprises the following steps: the water is contacted with a substance that weakly alkalinizes the water as described above.
The method for preparing the water with reducibility comprises the following steps: the water is contacted with the substance that reduces the oxidation-reduction potential of the water as described above.
The pH value of the weakly alkaline and reducing water ranges from 9 to 13, and the oxidation-reduction potential ranges from-400 to-50.
The step of pickling the rock with the pickling solution described above is further included before the step S3.
The method further comprises the following steps after the step S3:
step S4: dearsenification, separating the soaked water from the rock, and then contacting the separated water with the arsenic adsorbable material described above.
In step S3, the method further includes adding acid and/or introducing oxygen into the water when the separated water is contacted with the arsenic adsorbable material.
The method for reducing the arsenic content of the rock further comprises the step of preparing the water after arsenic removal into water with weak alkalinity and/or reducibility again, and repeating the steps S2, S3 and S4 until the arsenic content of the soaked water reaches a preset threshold value. In at least one embodiment, the predetermined threshold is 0.001 mg/L.
In at least one embodiment, the soaking temperature of step S3 is 60-80 ℃.
The volume ratio of the rock to the water having weak alkalinity and/or reducibility in the step S3 ranges from (1: 2) to (5: 2). When the volume of the dearsenification tank 21 of the device 100 for reducing the arsenic content in rock is 1000L, the water flow rate of the system is 2-20L/min. In this way, the arsenic content in the rock can be efficiently reduced.
It is understood that the method for reducing the arsenic content of rock is performed in the apparatus 100 for reducing the arsenic content of rock.
The present application will be described in detail with reference to specific examples, which are intended to be part of the present application and are not intended to limit the present application.
Example 1
In the device 100 for reducing the arsenic content in rock used in this embodiment, the first water-soluble arsenic capacity improving member 22 is a limestone layer, the second water-soluble arsenic capacity improving member 23 is a tourmaline layer, the first interlayer 24 is a stainless steel gauze, the second interlayer 25 is a stainless steel porous interlayer with PP cotton inside, the filter element 28 is a PP cotton filter membrane, and the arsenic adsorbing member 31 contains siderite.
Preparing 10kg of natural medical stone material into powder with the particle size of 60-120 meshes, adding the powder into a pickling tank 10 through a feeding port 11, and adding a pickling solution consisting of 1kg of citric acid and 20L of deionized water into the pickling tank 10 through the feeding port 11, wherein the volume ratio of the natural medical stone powder to the pickling solution is 1: 40, soaking the natural medical stone powder in the pickling solution for 24 hours, and filtering;
adding natural medical stone obtained by filtering into a dearsenification tank 21 of a dearsenification tank 20, sequentially installing a second interlayer 25, a second water-soluble arsenic capacity improving member 23, a first interlayer 24 and a first water-soluble arsenic capacity improving member 22 in the dearsenification tank 20, then introducing deionized water from a water inlet 201, enabling the deionized water to sequentially pass through the first water-soluble arsenic capacity improving member 22, the first interlayer 24, the second water-soluble arsenic capacity improving member 23 and the second interlayer 25 and then enter the dearsenification tank 21, enabling the deionized water to have water-rock interaction with the natural medical stone in the dearsenification tank 21 to remove arsenic adsorbed on the surface of the natural medical stone, filtering water in the dearsenification tank 21 through a filter 28 and then entering the arsenic recovery tank 30 through a first pipeline 40, and closing the water inlet 201 and the water overflow port 202 when water overflows from the water overflow port 202;
meanwhile, the circulating pump 60 and the singlechip 204 are started, the heating rod 26 is controlled by the singlechip 204 and the temperature sensor 27 to heat the water in the dearsenification tank 20 to 60 ℃, acid is added into the arsenic recovery tank 30 through the feed inlet 303, oxygen is introduced, under the action of the circulating pump 60, the arsenic-containing water in the high arsenic region 301 of the arsenic recovery tank 30 enters the low arsenic region 302 after being filtered and dearsenified by the arsenic adsorption part 31, is converted into water with weak acidity and oxidability under the action of the acid and the oxygen, then enters the second pipeline 50, is deoxidized by the deoxidizing part 70, returns to the top of the dearsenification tank 20, and then enters the dearsenification tank 21 through the first water soluble arsenic capacity improving part 22, the first interlayer 24, the second water soluble arsenic capacity improving part 23 and the second interlayer 25 in sequence, and then circulates for 24 hours;
and taking out the solution and the solid in the dearsenification tank 21, filtering, washing with deionized water, and drying to obtain the medical stone powder with lower arsenic content.
In this example, the pH of the water in the dearsenification tank 20 and the arsenic recovery tank 30 was 10.4 and the Eh value was-86 mV during the 12-hour circulation.
The method comprises the steps of sampling the Maifanitum powder with low arsenic content obtained in example 1 and untreated natural Maifanitum powder by a quartering method, respectively weighing 2 parts of 10g of sample, placing the sample into 4 conical flasks of 50ml, adding 20ml of deionized water for soaking for 24h, sucking the supernatant into a centrifuge tube, centrifuging the supernatant in a centrifuge, taking the supernatant in the centrifuge tube, filtering, dropwise adding concentrated nitric acid for acidification, observing the chromaticity, turbidity, odor and taste of the supernatant and visible substances, detecting the pH value and TDS (total dissolved solids) value of the supernatant, and testing the As content of the supernatant by ICP-MS (inductively coupled plasma Mass Spectrometry), wherein the results are shown in Table I.
Table one:
note: "ND" means not detected.
As can be seen from the table I, the arsenic content of the natural Maifanitum powder sample which is not treated by the apparatus 100 for reducing arsenic content in rock is 0.0018 and 0.0026mg/L respectively after being soaked for 24 hours, while the arsenic content of the Maifanitum powder sample obtained in example 1 is 0.0002 and 0.0004mg/L respectively after being soaked for 24 hours. Therefore, the device for reducing the arsenic content in the rock can effectively reduce the arsenic content in the medical stone.
Example 2
The first water-soluble arsenic capacity improving part 22 in the device 100 for reducing the arsenic content in rock used in this embodiment is a limestone layer, the second water-soluble arsenic capacity improving part 23 is a tourmaline layer, the first interlayer 24 is a stainless steel gauze, the second interlayer 25 is a stainless steel porous interlayer with a built-in PP sponge, the filter element 28 is a PP sponge filter membrane, and the arsenic adsorbing part 31 contains siderite.
Preparing 10kg of natural zeolite material into powder with the particle size of 80-200 meshes, adding the powder into a pickling tank 10 through a feeding port 11, and adding pickling solution consisting of 1kg of citric acid and 20L of deionized water into the pickling tank 10 through the feeding port 11, wherein the volume ratio of the natural zeolite powder to the pickling solution is 1: 60, soaking the natural zeolite powder in a pickling solution for 24 hours, and then filtering;
adding the filtered natural zeolite into a dearsenification tank 21 of a dearsenification tank 20, sequentially installing a second interlayer 25, a second water-soluble arsenic capacity improving member 23, a first interlayer 24 and a first water-soluble arsenic capacity improving member 22 in the dearsenification tank 20, introducing deionized water from a water inlet 201, allowing the deionized water to sequentially pass through the first water-soluble arsenic capacity improving member 22, the first interlayer 24, the second water-soluble arsenic capacity improving member 23 and the second interlayer 25, then allowing the deionized water to enter the dearsenification tank 21, performing water-rock reaction with the natural zeolite in the dearsenification tank 21 to remove arsenic adsorbed on the surface of the natural zeolite, filtering water in the dearsenification tank 21 by a filter 28, then allowing the water to enter an arsenic recovery tank 30 by a first pipeline 40, and closing the water inlet 201 and a water overflow port 202 when water overflows from the water overflow port 202;
meanwhile, the circulating pump 60 and the singlechip 204 are started, the heating rod 26 is controlled by the singlechip 204 and the temperature sensor 27 to heat the water in the dearsenification tank 20 to 60 ℃, acid is added into the arsenic recovery tank 30 through the feed inlet 303, oxygen is introduced, under the action of the circulating pump 60, the arsenic-containing water in the high arsenic region 301 of the arsenic recovery tank 30 enters the low arsenic region 302 after being filtered and dearsenified by the arsenic adsorption part 31, is converted into water with weak acidity and oxidability under the action of the acid and the oxygen, then enters the second pipeline 50, is deoxidized by the deoxidizing part 70, returns to the top of the dearsenification tank 20, and then enters the dearsenification tank 21 through the first water soluble arsenic capacity improving part 22, the first interlayer 24, the second water soluble arsenic capacity improving part 23 and the second interlayer 25 in sequence, and then circulates for 24 hours;
and taking out the solution and the solid in the dearsenification tank 21, filtering, washing with deionized water, and drying to obtain the zeolite powder with low arsenic content.
In this example, the pH of the water in the dearsenification tank 20 and the arsenic recovery tank 30 was 11.2 and the Eh value was-117 mV at the time of 12 hours of circulation.
Sampling the zeolite powder with low arsenic content obtained in example 2 and untreated natural zeolite powder by a quartering method, respectively weighing 2 parts of 10g of sample, placing the sample into 4 conical flasks of 50ml, adding 20ml of deionized water for soaking for 24h, sucking the supernatant into a centrifuge tube, centrifuging the centrifuge tube, taking the supernatant in the centrifuge tube, filtering, dropwise adding concentrated nitric acid for acidification, observing the chromaticity, turbidity, odor and taste of the supernatant and visible substances, detecting the pH value and TDS value of the supernatant, and testing the As content of the supernatant by ICP-MS, wherein the results are shown in Table II.
Table two:
as can be seen from Table two, the arsenic content of the natural zeolite powder sample which is not treated by the apparatus 100 for reducing the arsenic content of the rock is 0.0035 and 0.0057mg/L respectively after being soaked for 24 hours, while the arsenic content of the natural zeolite powder sample obtained in example 2 is 0.0006 and 0.0008mg/L respectively after being soaked for 24 hours. Therefore, the device for reducing the arsenic content in the rock can effectively reduce the arsenic content in the zeolite.
The device and the method for reducing the arsenic content in the rock provided by the embodiment of the application are described in detail, the principle and the embodiment of the application are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (19)
1. An apparatus for reducing arsenic content in rock, comprising: the device is including taking off the arsenic jar, it has the dearsenification pond to take off the arsenic jar in being formed with to it promotes the piece to be equipped with water-soluble arsenic ability, it is provided with the water inlet on the arsenic jar to take off the arsenic jar, the water inlet with it is located respectively to take off the arsenic pond the both sides of water-soluble arsenic ability promotion piece, the rock holding is in the dearsenification pond, water gets into the dearsenification jar through the water inlet to in the promotion of water-soluble arsenic ability gets into the dearsenification pond after, with the rock contact and dissolve the arsenic in the rock.
2. The apparatus of claim 1, wherein: the water-soluble arsenic capacity improving piece comprises a substance capable of weakening alkalization water and/or a substance capable of reducing oxidation-reduction potential of water.
3. The apparatus of claim 1, wherein: two arsenic dissolving capacity promoting pieces are arranged in the arsenic removal tank, wherein one arsenic dissolving capacity promoting piece contains a substance capable of weakly alkalizing water, and the other arsenic dissolving capacity promoting piece contains a substance capable of reducing the oxidation-reduction potential of water.
4. The apparatus of claim 2 or 3, wherein: the material capable of weakly alkalizing water is at least one of limestone, calcite, dolomite and aragonite; and/or
The substance capable of reducing oxidation-reduction potential of water is at least one selected from tourmaline and magnesium.
5. The apparatus of claim 1, wherein: the device still includes arsenic recovery jar, first pipeline and second pipeline, be provided with arsenic adsorption element in the arsenic recovery jar, arsenic adsorption element is retrieved jar interval with arsenic and is become high arsenic district and low arsenic district, dearsenization jar dearsenization pond with arsenic recovery jar's high arsenic district passes through first pipeline intercommunication, dearsenization jar with arsenic recovery jar's low arsenic district passes through second pipeline intercommunication, just the second pipeline with dearsenization jar meet the department with dearsenization pond is located respectively the both sides of water-soluble arsenic ability promotion piece, the water warp that is dissolved with arsenic in the dearsenization pond first pipeline gets into the high arsenic district in the arsenic recovery jar, the water warp in the low arsenic district of arsenic recovery jar enters by the second pipeline in the dearsenization jar.
6. The apparatus of claim 5, wherein: the arsenic adsorption piece comprises a material capable of adsorbing arsenic, and the material capable of adsorbing arsenic is at least one of siderite, hematite, rhodochrosite and manganite.
7. The apparatus of claim 5, wherein: the second pipeline is provided with a circulating pump for providing power to input water in the low-arsenic region into the arsenic removal tank through the second pipeline; and/or
And the second pipeline is provided with a deoxidizing part for removing oxygen in water.
8. The apparatus of claim 1, wherein: install heating rod and temperature sensor on the jar wall of dearsenification jar, heating rod and temperature sensor are connected with the singlechip, the heating rod is used for heating the water in the dearsenification jar, temperature sensor is used for monitoring the temperature and feeds back the monitoring result to the singlechip, the singlechip is used for predetermineeing temperature control according to the water in the heating rod heating dearsenification jar.
9. The apparatus of claim 3, wherein: an interlayer is also arranged in the arsenic removal tank and is arranged between the water-soluble arsenic capacity improving piece and the arsenic removal tank; and/or
At least two interlayers are further arranged in the arsenic removal tank, and interlayers are arranged between the two water-soluble arsenic capacity promoting pieces and between the water-soluble arsenic capacity promoting pieces and the arsenic removal tank.
10. The apparatus of claim 1, wherein: the device also comprises a pickling tank, wherein a pickling solution is added into the pickling tank, the rock is firstly put into the pickling tank, and then put into the arsenic removal tank after being pickled by the pickling solution.
11. A method for reducing the arsenic content of rock, comprising the steps of:
step S1: providing a rock;
step S2: preparing water with weak alkalinity and/or reducibility; and
step S3: soaking the rock in the water with weak alkalinity and/or reducibility.
12. The method of claim 11, wherein: the pH value of the weakly alkaline water is in the range of 9-13; and/or
The redox potential of the reducing water ranges from-400 to-50; and/or
The soaking temperature is 60-80 ℃; and/or
The volume ratio of the rock to the water having weak alkalinity and/or reducibility ranges from (1: 2) to (5: 2).
13. The method of claim 11, wherein: the method for preparing the water with weak alkalinity comprises the following steps: contacting the water with a weakly alkalinizable water substance; and/or
The method for preparing the water with reducibility comprises the following steps: the water is contacted with a substance that reduces the oxidation-reduction potential of the water.
14. The method of claim 13, wherein: the material capable of weakly alkalizing water is at least one of limestone, calcite, dolomite and aragonite; and/or
The substance capable of reducing oxidation-reduction potential of water is at least one selected from tourmaline and magnesium.
15. The method of claim 11, wherein: the method further comprises a step of pickling the rock with a pickling solution before the step S3, wherein the volume ratio of the rock to the pickling solution is in the range of 1: (10-100).
16. The method of claim 11, wherein: the method further comprises the following steps after the step S3:
step S4: and dearsenifying, separating the soaked water from the rock, and then contacting the separated water with a material capable of adsorbing arsenic, wherein the material capable of adsorbing arsenic is at least one of siderite, hematite, rhodochrosite and manganite.
17. The method of claim 16, wherein: the step of adding acid and/or introducing oxygen into the water when the separated water is contacted with the material capable of adsorbing arsenic.
18. The method of claim 16 or 17, wherein: the method further comprises the following steps:
and (4) preparing the water after dearsenification into water with weak alkalinity and/or reducibility again, and repeating the steps S2, S3 and S4 until the arsenic content in the rock reaches a preset threshold value.
19. The method is carried out in an apparatus according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110899901.9A CN113549777A (en) | 2021-08-06 | 2021-08-06 | Device and method for reducing arsenic content of rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110899901.9A CN113549777A (en) | 2021-08-06 | 2021-08-06 | Device and method for reducing arsenic content of rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113549777A true CN113549777A (en) | 2021-10-26 |
Family
ID=78105413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110899901.9A Pending CN113549777A (en) | 2021-08-06 | 2021-08-06 | Device and method for reducing arsenic content of rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113549777A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB888297A (en) * | 1957-03-14 | 1962-01-31 | Dorr Oliver Inc | Method for removing arsenic from arsenopyrite ores |
| CA1067627A (en) * | 1976-08-20 | 1979-12-04 | Gerald D. Lutwick | Removal of arsenic from water |
| CN1079004A (en) * | 1992-05-16 | 1993-12-01 | 中国科学院化工冶金研究所 | Remove and reclaim the technology of orpiment in the difficult metallurgical ore deposit of self-contained arsenic |
| US20140017152A1 (en) * | 2010-10-20 | 2014-01-16 | David Nako | Method for treating arsenic containing materials |
| WO2015079116A1 (en) * | 2013-11-29 | 2015-06-04 | Outotec (Finland) Oy | Method and arrangement of separating arsenic from starting materials |
| CN208757582U (en) * | 2018-08-07 | 2019-04-19 | 昆山市精细化工研究所有限公司 | A kind of dearsenification device for petrochemical industry dearsenification |
| CN208883950U (en) * | 2018-09-28 | 2019-05-21 | 昆明学院 | A Heap Leach-Adsorption Device for Laboratory Multi-parameter Monitoring |
-
2021
- 2021-08-06 CN CN202110899901.9A patent/CN113549777A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB888297A (en) * | 1957-03-14 | 1962-01-31 | Dorr Oliver Inc | Method for removing arsenic from arsenopyrite ores |
| CA1067627A (en) * | 1976-08-20 | 1979-12-04 | Gerald D. Lutwick | Removal of arsenic from water |
| CN1079004A (en) * | 1992-05-16 | 1993-12-01 | 中国科学院化工冶金研究所 | Remove and reclaim the technology of orpiment in the difficult metallurgical ore deposit of self-contained arsenic |
| US20140017152A1 (en) * | 2010-10-20 | 2014-01-16 | David Nako | Method for treating arsenic containing materials |
| WO2015079116A1 (en) * | 2013-11-29 | 2015-06-04 | Outotec (Finland) Oy | Method and arrangement of separating arsenic from starting materials |
| CN208757582U (en) * | 2018-08-07 | 2019-04-19 | 昆山市精细化工研究所有限公司 | A kind of dearsenification device for petrochemical industry dearsenification |
| CN208883950U (en) * | 2018-09-28 | 2019-05-21 | 昆明学院 | A Heap Leach-Adsorption Device for Laboratory Multi-parameter Monitoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102092870B (en) | Sewage treatment equipment and process for concentration/chemical oxidation regeneration of absorbent | |
| Twidwell et al. | Technologies and potential technologies for removing selenium from process and mine wastewater | |
| CN101348297B (en) | Processing method for heavy metal ion-containing waste water | |
| CN104129850B (en) | A kind of method of azotate pollution in in-situ remediation of underground water | |
| CN101163530A (en) | Compositions and methods for removing arsenic in water | |
| CN101544434A (en) | Sewage treatment method and device thereof | |
| CN101333026A (en) | A method and device for removing excessive iron and manganese in underground seawater | |
| CN111804304A (en) | Core-shell structure composite filter material, preparation method and application thereof, ammonia nitrogen wastewater treatment method and device | |
| CN104998612B (en) | A kind of uranium-containing waste water detergent and the method for handling uranium-containing waste water | |
| EP2580168B1 (en) | Method for removal of radionuclides from ferrous ground water | |
| CN207013439U (en) | A kind of system of repairing heavy metal in soil pollution | |
| CN116161834A (en) | Heavy metal wastewater treatment method based on zero-valent iron packed bed system | |
| CN101959804B (en) | Water treatment equipment and method of water treatment | |
| CN113549777A (en) | Device and method for reducing arsenic content of rock | |
| CN1142109C (en) | Decontamination process for cyanogen-contained solution and its method for recovering valence component | |
| CN203946974U (en) | A kind for the treatment of system containing vanadium and arsenic waste water | |
| Yusof et al. | Adsorption of some toxic elements from water samples on modified activated carbon, activated carbon and red soil using neutron activation analysis | |
| CN109317089A (en) | A kind of magnetic adsorption material and its preparation and method for treating thallium-containing wastewater | |
| CN115626733A (en) | Method for purification and regeneration of aquaculture wastewater | |
| Nleya | Removal of toxic metals and recovery of acid from acid mine drainage using acid retardation and adsorption processes | |
| JP5931534B2 (en) | Wastewater treatment system with amorphous calcium silicate hydrate. | |
| CA3022776A1 (en) | Method and process arrangement of removing cations from water | |
| Yoshizuka et al. | Arsenic and boron in geothermal water and their removal | |
| CN109665652A (en) | A kind of integrated intelligent landfill leachate treatment device and method | |
| CN117886488B (en) | Thallium-containing wastewater treatment device and treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |