CN102319725A - Method for removing heavy metal in soil - Google Patents
Method for removing heavy metal in soil Download PDFInfo
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- CN102319725A CN102319725A CN201110139461A CN201110139461A CN102319725A CN 102319725 A CN102319725 A CN 102319725A CN 201110139461 A CN201110139461 A CN 201110139461A CN 201110139461 A CN201110139461 A CN 201110139461A CN 102319725 A CN102319725 A CN 102319725A
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- 239000002689 soil Substances 0.000 title claims abstract description 172
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 53
- 230000000274 adsorptive effect Effects 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 238000007885 magnetic separation Methods 0.000 claims description 14
- 230000005415 magnetization Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 230000003442 weekly effect Effects 0.000 claims description 4
- MAQAUGBCWORAAB-UHFFFAOYSA-N [C+4].[O-2].[Fe+2].[O-2].[O-2] Chemical compound [C+4].[O-2].[Fe+2].[O-2].[O-2] MAQAUGBCWORAAB-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000006148 magnetic separator Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- RLJMLMKIBZAXJO-UHFFFAOYSA-N lead nitrate Chemical compound [O-][N+](=O)O[Pb]O[N+]([O-])=O RLJMLMKIBZAXJO-UHFFFAOYSA-N 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010187 selection method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 208000030527 Minamata disease Diseases 0.000 description 1
- 208000009507 Nervous System Mercury Poisoning Diseases 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000120 microwave digestion Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- KZDMWVBUOTWRDX-UHFFFAOYSA-J sodium cerium(3+) tetrahydroxide Chemical compound [OH-].[Na+].[Ce+3].[OH-].[OH-].[OH-] KZDMWVBUOTWRDX-UHFFFAOYSA-J 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
本发明公开了一种去除土壤中重金属的方法，属污染土壤治理领域。该方法包括以下步骤：调节所处理土壤的含水率为8％～12％；向调节含水率后的土壤中均匀投加磁性吸附材料，磁性吸附材料的投加量为每1kg土壤中投加10～50g；对投加磁性吸附材料后的土壤定期调节其含水率，保持土壤的含水率为8％～12％，并定期对土壤进行一次搅拌均匀；对经过上述处理一定周期后的土壤以磁选的方式收集出土壤中的磁性吸附材料，即完成去除土壤中的重金属。该方法操作简单，对重金属污染后的土壤可实现高效、低成本的处理，具有低耗能及环境友好的优点，并且该方法可以常用的植物修复重金属污染土壤技术相结合使用，具有良好的推广应用价值。The invention discloses a method for removing heavy metals in soil, belonging to the field of contaminated soil treatment. The method comprises the following steps: adjusting the moisture content of the treated soil to 8% to 12%; uniformly adding magnetic adsorption materials to the soil after adjusting the moisture content, and the dosage of the magnetic adsorption materials is 10 per kg of soil. ~50g; regularly adjust the moisture content of the soil after adding magnetic adsorption materials, keep the moisture content of the soil at 8% to 12%, and stir the soil once regularly; The selected method collects the magnetic adsorption material in the soil, that is, completes the removal of heavy metals in the soil. The method is simple to operate, can achieve high-efficiency and low-cost treatment of heavy metal-contaminated soil, has the advantages of low energy consumption and environmental friendliness, and this method can be used in combination with commonly used phytoremediation of heavy metal-contaminated soil technology, and has good promotion Value.
Description
Technical field
The present invention relates to contaminated soil and administer the field, particularly relate to a kind of method of removing heavy metal in soil.
Background technology
Heavy metal pollution of soil is the typical pollutant type of soil environment; Its typical case representative as cadmium, mercury, lead, arsenic etc. generally have and distribute wide, by force disguised and endanger serious characteristics; Relevant heavy metal-polluted soil poisoning takes place time and again, like itai-itai, minamata disease etc.Therefore, it being administered and removes is paying close attention to and research contents of ambient soil field in recent years.Heavy-metal contaminated soil recovery technique commonly used at present mainly contains phytoremediation technology, electric repairing technique and chemical leaching technology; With the phytoremediation technology is example; Generally only about 10%～15%, still there is certain problem in the application of other recovery techniques to the removal efficiency of heavy metals in one of which year generally.Therefore, development of new is efficient, the contaminated soil heavy metal of low consumption is administered technology, especially is conceived to have great importance and be worth applying of scale.
Summary of the invention
The purpose of embodiment of the present invention provides a kind of method of removing heavy metal in soil; It is a kind of efficient, quick, easy to operate, easy heavy-metal contaminated soil restorative procedure of promoting; Can with other heavy-metal contaminated soil recovery techniques associatings such as phytoremediation, reach and take into account environment friendly and further reduce cost.
The objective of the invention is to realize through following technical scheme:
Embodiment of the present invention provides a kind of method of removing heavy metal in soil, and this method may further comprise the steps:
The moisture content of regulating the soil of handling is 8%～12%;
Evenly add magnetic adsorptive material in the soil after regulating moisture content, the dosage of magnetic adsorptive material is that every 1kg soil adds 10～50g;
To adding its moisture content of soil periodic adjustment behind the magnetic adsorptive material, keeping the moisture content of soil is 8%～12%, and regularly soil is once stirred;
To collecting out the magnetic adsorptive material in the soil with the mode of magnetic separation, promptly accomplish the heavy metal of removing in the soil through the soil behind the above-mentioned processing some cycles.
In the said method, said is after 8%～12% at the moisture content of regulating the soil of handling, also comprises:
Institute is handled pH in soil be adjusted to 5～6.
In the said method, said after the soil behind the above-mentioned processing some cycles of process is collected out the magnetic adsorptive material in the soil with the mode of magnetic separation, also comprise the step of confirming heavy metal-polluted soil is removed efficient in the following manner:
According to the content of beary metal of repairing in the forward and backward soil, with the removal efficient of computes heavy metal-polluted soil:
E is the removal efficient of heavy metal in soil in the formula, the % of unit;
C
0Be the concentration of original heavy metal in the soil, the mg/kg of unit;
C is the concentration of original heavy metal in the soil, the mg/kg of unit;
100 is conversion coefficient.
In the said method, the magnetic adsorptive material that evenly adds in the said soil after regulating moisture content adopts:
Magnetization active carbon, magnetization sorbing material CuFe
2O
4, any or any several kinds in the active carbon iron oxide composite adsorbing material.
In the said method, saidly be: regulate the moisture content of soil 1～2 time weekly to its moisture content of soil periodic adjustment that adds behind the magnetic adsorptive material.
In the said method, said regularly soil once being stirred is: soil was once stirred in per 3 days.
In the said method, in the said method, be to the magnetic adsorptive material of collecting out in the soil with the mode of magnetic separation through the soil behind the above-mentioned processing some cycles:
Soil to through 1 to 3 cycle of above-mentioned processing (each cycle is 2 time-of-weeks) carries out collecting out the magnetic adsorptive material in the soil with the mode of magnetic separation again.
In the said method, the magnetic adsorptive material that said mode with magnetic separation is collected out in the soil is: adopt cylinder magnetic separator to collect out the magnetic adsorptive material in the soil.
Technical scheme by the invention described above provides can be found out; Behind the moisture content through the adjusting soil of handling in the embodiment of the present invention; In soil, add the heavy metal in the magnetic adsorptive material absorption soil; And regularly soil is carried out moisture content adjusting, even stir process, improved the effect of the heavy metal in the magnetic adsorptive material absorption soil, most effective the reaching about 24.6% of removal after 2 weeks of processing; Can effectively reclaim magnetic adsorptive material through the magnetic separation mode, reach the purpose of magnetic adsorptive material recycling.This method is simple to operate; Can realize efficiently, handle cheaply the soil after the heavy metal pollution; Have low power consuming and eco-friendly advantage, and the use that combines of the phytoremediation heavy-metal contaminated soil technology that can use always of this method, good application value had.
The specific embodiment
Below in conjunction with specific embodiment the technical scheme among the present invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that is obtained under the creative work prerequisite.
Main points of the present invention are: through high magnetic adsorptive materials such as magnetization active carbons the heavy metal contaminants in the soil is adsorbed and enrichment; Utilize the method for magnetic separation to collect the magnetization active carbon again; With heavy-metal movement outside soil system; Realize removing the heavy metal in the soil, reach the purpose that purifies soil.This method can be used for the removal of various heavy such as cadmium in the soil system, arsenic, mercury, lead.
Below in conjunction with specific embodiment the present invention is described further.
Present embodiment provides a kind of method of removing heavy metal in soil, is a kind of improvement method to heavy-metal contaminated soil, and this method may further comprise the steps:
A, soil property are regulated: the moisture content of regulating the soil of handling is 8%～12%;
Because the activity of heavy metal in soil and dissolubility require suitable moisture condition; So should be adjusted to soil moisture content about 10%; Regulate moisture content simultaneously and help soil particle appropriateness and disperse, that can strengthen heavy metal element and charcoal absorption material fully contacts the increase adsorption area; On the other hand, most of heavy metal more is prone to dissolving and migration under acid condition, so should be to the characteristics of target heavy metal contaminants;
Optional, also can regulate the processing pH in soil, generally soil pH value is transferred to 5～6;
B, add magnetic adsorptive material (being the magnetic material of high-adsorption-capacity): steps A is regulated in the soil of mixing, add the magnetic adsorptive material of high-adsorption-capacity, the dosage of magnetic adsorptive material is that every 1kg soil adds 10～50g; Magnetic adsorptive material can adopt magnetization active carbon, magnetization sorbing material CuFe
2O
4, any or any several kinds in the active carbon iron oxide composite adsorbing material etc.As being example with the magnetization active carbon as magnetic adsorptive material, dosage is the magnetization active carbon that every 1kg soil can add 20g.
The absorption of the heavy metal in C, the soil and enrichment: to adding the soil system of active carbon magnetic adsorptive material, regularly (1-2 time weekly) adjusting moisture content makes its maintenance basicly stable 8～12%, and at per 3 days soil is stirred once;
The collection of magnetic adsorptive material behind D, the absorption heavy metal: use magnetic selection method (as using the cylinder magnetic separator magnetic separation), the soil system after processing 1-3 cycle (each cycle is 2 time-of-weeks) is carried out the collection of adsorbent; Basically accomplish removal after collecting magnetic adsorptive material to heavy metal in soil.
After said method, can confirm removal efficient through following step to heavy metal-polluted soil, comprising:
Heavy metal-polluted soil is removed efficiency rating: according to the content of beary metal in the soil before and after repairing, with the removal effect of computes heavy metal-polluted soil.
E is the removal efficient of heavy metal in soil in the formula, %;
C0 is the concentration of original heavy metal in the soil, mg/kg;
C is the concentration of original heavy metal in the soil, mg/kg;
100 is conversion coefficient.
In the said method, the content of beary metal of repairing forward and backward soil micro-wave digestion capable of using-ICP method is measured.
The magnetic adsorptive material that said method step B adds can adopt the dipping absorption method to prepare, and as being example with dipping absorption method preparation magnetization active carbon, its concrete grammar is following:
With Fe
3+: Fe
2+Mol ratio be that 2.0: 1.1 ratio is with FeSO
4And FeCl
3Carry out quick stirring and dissolving, slowly be warmed up to 80～90 ℃, keep 40min, to form nanoscale Fe
3O
4Solids precipitation.The back slowly drips an amount of oleic acid in above-mentioned mixed system, keep temperature 30min.Separate with magnet afterwards, clean repeatedly, obtain the block magnetic Fe of black through ammoniacal liquor, deionized water
3O
4Gel.With the block magnetic Fe of above-mentioned black
3O
4Gel 5g evenly spreads to and forms n-hexane base magnetic solution in the 100mL n-hexane, and the 10g granular active carbon is flooded absorption 40～60min in 100mL magnetic solution.Active carbon after the load is immersed in supersound washing under the power of 500W with n-hexane, removes surface and the unstable magnetic component of inner absorption.Collect activated carbon granule, slowly dry down at 40 ℃ and vapor away unnecessary n-hexane.At this moment, for making the magnetic component steady load of absorption, with above-mentioned product at N
2In the atmosphere under 400～500 ℃ in Muffle furnace sintering 40～60min, take out constant temperature and be cooled to room temperature, be the magnetization active carbon.
Through removal process, said method is described further below heavy metal in soil.
The reagent preparation
(1) salpeter solution: will analyze pure red fuming nitric acid (RFNA) dilution and be the salpeter solution of 0.5mol/L.
(2) sodium hydroxide solution: will analyze pure cerium hydroxide sodium powder dissolution in deionized water, and be made into the sodium hydroxide solution of 0.5mol/L.
(3) lead nitrate solution: will analyze pure plumbi nitras powder and be dissolved in the lead nitrate solution that is made into 0.5mol/L in the deionized water.
Operating procedure
1) the soil basic physical and chemical is measured: get clean pedotheque, measure its moisture content and pH value, the result is a soil moisture content 5.2%, and the pH value is 7.1;
2) the soil fundamental property is regulated: get the clean soil of 4kg for every part; Be respectively charged in the Stainless steel basin; With the sodium hydroxide solution of the salpeter solution of the 0.5mol/L of above-mentioned preparation, 0.5mol/L the pH value of 2 parts of pedotheques is transferred to 6 and 9.0 respectively; Another pedotheque is that former pH value is constant, and moisture content transfers to 10%;
3) heavy metal lead adds: lead nitrate solution is evenly added above-mentioned soil system; The concentration of lead is adjusted to 500mg/kg dry ground and 900mg/kg respectively; 2 heavy metal concentration scopes of 3 kinds of pH values; Totally 6 kinds of processing, wherein lead concentration 500mg/kg acid ground is that No. 1, lead concentration 900mg/kg acid ground are that No. 2, lead concentration 500mg/kg neutral soil are that No. 3, lead concentration 900mg/kg neutral soil are that No. 4, lead concentration 500mg/kg basic soil are that No. 5, lead concentration 900mg/kg basic soil are No. 6;
4) add the magnetic adsorptive material of high-adsorption-capacity: be acid, neutral and alkaline soil system to above-mentioned 3 kinds, the amount that adds 20g magnetization active carbon by every 1kg soil respectively adds, and every basin soil quality is 2kg, and promptly every basin adds 40g magnetization active carbon.
5) absorption of the heavy metal in the soil and enrichment: to adding the soil system of active carbon magnetic adsorptive material, regularly regulate moisture content 2 times weekly, make its maintenance basicly stable 10%; Soil stirred once in per 3 days, active carbon can evenly be contacted with soil and heavy metal, process continued for 2 weeks;
6) collection of magnetic adsorptive material behind the absorption heavy metal: use magnetic selection method, to handling the soil system after 2 weeks, reclaim magnetic adsorptive material, accomplish heavy-metal movement is removed out soil system with magnet.
7) heavy metal-polluted soil is measured: utilize micro-wave digestion-ICP method that (representing with mg/kg) measured and analyzed to the lead content before and after the soil remediation, the result is as shown in the table:
8) the heavy metal-polluted soil removal effect is estimated: according to the content of beary metal in the soil before and after repairing, with the removal effect of computes heavy metal-polluted soil.The result of calculation of different disposal is as shown in the table.
E is the removal efficient of heavy metal in soil in the formula, %;
C0 is the concentration of original heavy metal in the soil, mg/kg;
C is the concentration of original heavy metal in the soil, mg/kg;
100 is conversion coefficient.
Effect assessment: according to the content of beary metal in the soil before and after repairing, with the removal effect of computes heavy metal-polluted soil.The result of calculation of different disposal is as shown in table 1.
9) heavy metal pollution of soil is removed second evaluation: repeat above-mentioned steps 4) to 8), carry out after-treatment to removing the soil system of going over heavy metal, estimate effect and the possibility repeatedly handled.The result is also as shown in table 1.
The removal effect of lead in the table 1 different disposal heavy-metal contaminated soil
Visible by data in above-mentioned research and the table; Heavy metal efficient with in high magnetic adsorptive material absorption and the removal soil is higher; Under acid condition, the plumbous clearances of the soil in 2 weeks can reach 24.6%, and to compare its removal effect obvious with traditional removal method such as phytoremediation.Along with the rising of soil pH value, the removal efficient of heavy metal in soil descends to some extent, and neutrallty condition is 18%-20% down, and (the pH value of this research is transferred to 9.0) removal rate of heavy metal is then lower under the strong alkaline condition.
The data of contrast after-treatment are visible, can continue repeatedly to handle to heavy-metal contaminated soil with this kind method, and its handling rate can guarantee basically, can reach 21%-22% under the acid condition.But because the reduction of active heavy metal ratio, possible overall treatment efficiency may descend to some extent.
To sum up; What the present invention carried out adsorbs and can make things convenient for, remove efficiently the heavy metal pollution in the soil with the heavy metal-polluted soil processing method that magnetic selection method removes out soil system with high magnetic adsorptive material (active carbon); And its operating equipment is simple, and efficient is high, cost is low, can be by Processes and apparatus such as magnetic separation; Can fast, efficiently remove the heavy metal contaminants in the soil, have good popularizing application prospect.
The above; Be merely the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. a method of removing heavy metal in soil is characterized in that, this method may further comprise the steps:
The moisture content of regulating the soil of handling is 8%～12%;
Evenly add magnetic adsorptive material in the soil after regulating moisture content, the dosage of magnetic adsorptive material is that every 1kg soil adds 10～50g;
To adding its moisture content of soil periodic adjustment behind the magnetic adsorptive material, keeping the moisture content of soil is 8%～12%, and regularly soil is once stirred;
To collecting out the magnetic adsorptive material in the soil with the mode of magnetic separation, promptly accomplish the heavy metal of removing in the soil through the soil behind the above-mentioned processing some cycles.
2. the method for removal heavy metal in soil according to claim 1 is characterized in that, said is after 8%～12% at the moisture content of regulating the soil of handling, also comprises:
Institute is handled pH in soil be adjusted to 5～6.
3. the method for removal heavy metal in soil according to claim 1; It is characterized in that; Said after the soil behind the above-mentioned processing some cycles of process is collected out the magnetic adsorptive material in the soil with the mode of magnetic separation, also comprise the step of confirming heavy metal-polluted soil is removed efficient in the following manner:
According to the content of beary metal of repairing in the forward and backward soil, with the removal efficient of computes heavy metal-polluted soil:
E is the removal efficient of heavy metal in soil in the formula, the % of unit;
C
0Be the concentration of original heavy metal in the soil, the mg/kg of unit;
C is the concentration of original heavy metal in the soil, the mg/kg of unit;
100 is conversion coefficient.
4. the method for removal heavy metal in soil according to claim 1 is characterized in that, the magnetic adsorptive material that evenly adds in the said soil after regulating moisture content adopts:
Magnetization active carbon, magnetization sorbing material CuFe
2O
4, any or any several kinds in the active carbon iron oxide composite adsorbing material.
5. according to the method for claim 1,2 or 3 described removal heavy metal in soil, it is characterized in that, saidly be: regulate the moisture content of soil 1～2 time weekly its moisture content of soil periodic adjustment that adds behind the magnetic adsorptive material.
6. according to the method for claim 1,2 or 3 described removal heavy metal in soil, it is characterized in that said regularly soil once being stirred is: soil was once stirred in per 3 days.
7. according to the method for claim 1,2 or 3 described removal heavy metal in soil, it is characterized in that, in the said method, be the magnetic adsorptive material of collecting out in the soil with the mode of magnetic separation through the soil behind the above-mentioned processing some cycles:
Soil to through above-mentioned 1 to 3 cycle of processing carries out collecting out the magnetic adsorptive material in the soil with the mode of magnetic separation again; Wherein each cycle was 2 weeks.
8. according to the method for claim 1,2 or 3 described removal heavy metal in soil, it is characterized in that the magnetic adsorptive material that said mode with magnetic separation is collected out in the soil is: adopt cylinder magnetic separator to collect out the magnetic adsorptive material in the soil.
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|---|---|---|---|
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755879A (en) * | 2012-08-13 | 2012-10-31 | 常州大学 | Preparation method of magnetic mineralized refuse for water treatment |
| CN103962371A (en) * | 2014-05-12 | 2014-08-06 | 福建工程学院 | Nondestructive restoration method for polluted soil |
| CN104043646A (en) * | 2014-06-24 | 2014-09-17 | 齐绍武 | Method for separating harmful heavy metals in paddy field |
| CN104889148A (en) * | 2015-05-21 | 2015-09-09 | 桂林理工大学 | Static passivation and adsorption repair method for heavy metal contaminated soil/tailing sand of tailing sand reservoir |
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| CN109332370A (en) * | 2018-11-22 | 2019-02-15 | 东北石油大学 | In situ remediation method for heavy metal chromium ion-contaminated soil |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3743130A1 (en) * | 1987-03-14 | 1988-09-22 | Siemens Ag | Process for the extraction from heavy metals from polluted soils, and appliance for countercurrent extraction in such a process |
| JPH1071387A (en) * | 1996-08-30 | 1998-03-17 | Dowa Mining Co Ltd | Remediation of soil |
| CN101016588A (en) * | 2007-03-08 | 2007-08-15 | 北京化工大学 | Method of eliminating and reclaiming metal form petroleum |
| CN101502789A (en) * | 2009-01-22 | 2009-08-12 | 上海交通大学 | Method for preparing magnetic active carbon composite material for water processing |
-
2011
- 2011-05-26 CN CN201110139461A patent/CN102319725A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3743130A1 (en) * | 1987-03-14 | 1988-09-22 | Siemens Ag | Process for the extraction from heavy metals from polluted soils, and appliance for countercurrent extraction in such a process |
| JPH1071387A (en) * | 1996-08-30 | 1998-03-17 | Dowa Mining Co Ltd | Remediation of soil |
| CN101016588A (en) * | 2007-03-08 | 2007-08-15 | 北京化工大学 | Method of eliminating and reclaiming metal form petroleum |
| CN101502789A (en) * | 2009-01-22 | 2009-08-12 | 上海交通大学 | Method for preparing magnetic active carbon composite material for water processing |
Non-Patent Citations (1)
| Title |
|---|
| CÍNTHIA S. ET AL: "Activated carboniron oxide composites for the removal of atrazine from aqueous medium", 《JOURNAL OF HAZARDOUS MATERIALS》, vol. 164, no. 23, 30 May 2009 (2009-05-30), pages 609 - 614, XP026028028, DOI: doi:10.1016/j.jhazmat.2008.08.066 * |
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| CN107321298B (en) * | 2017-07-03 | 2019-07-12 | 浙江大学 | Preparation method of modified magnet and its application in remediation of heavy metal pollution |
| CN107722991A (en) * | 2017-10-31 | 2018-02-23 | 中国环境科学研究院 | A kind of heavy metal-polluted soil pollution of chromium repair materials and preparation method and application |
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| CN111530909B (en) * | 2020-05-09 | 2021-11-16 | 益阳生力材料科技股份有限公司 | Pre-buried formula soil heavy metal adsorbs transfer device |
| CN112170475A (en) * | 2020-09-08 | 2021-01-05 | 吉林省林业科学研究院 | Heavy metal contaminated soil remediation agent and remediation method |
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| CN113245357B (en) * | 2021-04-16 | 2022-08-05 | 浙江工业大学 | Method for adsorbing heavy metals in soil by using propiconazole and geomembrane source micro-plastic |
| CN114431053A (en) * | 2022-01-13 | 2022-05-06 | 重庆市奉节县多品农业发展有限公司 | A soil remediation method for green and high-yield navel oranges in old orchards |
| CN115990610A (en) * | 2023-01-30 | 2023-04-21 | 中科鼎实环境工程有限公司 | Farmland heavy metal pollution treatment and restoration equipment |
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