CN107737579A - A kind of biomass carbon buffer and preparation method thereof - Google Patents
A kind of biomass carbon buffer and preparation method thereof Download PDFInfo
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- CN107737579A CN107737579A CN201711068822.3A CN201711068822A CN107737579A CN 107737579 A CN107737579 A CN 107737579A CN 201711068822 A CN201711068822 A CN 201711068822A CN 107737579 A CN107737579 A CN 107737579A
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- biomass carbon
- biological charcoal
- carbon buffer
- maize straw
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 58
- 239000002028 Biomass Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003610 charcoal Substances 0.000 claims abstract description 77
- 239000010902 straw Substances 0.000 claims abstract description 74
- 240000008042 Zea mays Species 0.000 claims abstract description 73
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 73
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 claims abstract description 69
- 235000009973 maize Nutrition 0.000 claims abstract description 69
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 22
- 239000001509 sodium citrate Substances 0.000 claims abstract description 20
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 34
- 238000001035 drying Methods 0.000 claims description 34
- 239000012298 atmosphere Substances 0.000 claims description 33
- 238000010521 absorption reaction Methods 0.000 claims description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- 239000001301 oxygen Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000009514 concussion Effects 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 13
- 229910021641 deionized water Inorganic materials 0.000 claims description 13
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 4
- 235000005822 corn Nutrition 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000010977 jade Substances 0.000 claims 1
- 239000003463 adsorbent Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003763 carbonization Methods 0.000 abstract description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 16
- 239000012299 nitrogen atmosphere Substances 0.000 description 14
- 206010010254 Concussion Diseases 0.000 description 13
- 230000008859 change Effects 0.000 description 8
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- 229910052738 indium Inorganic materials 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 238000001994 activation Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 244000105624 Arachis hypogaea Species 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
- 235000018262 Arachis monticola Nutrition 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000037356 lipid metabolism Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a kind of charcoal buffer and preparation method thereof, the charcoal buffer includes：100~600 parts of acidifying cornstalk biological charcoal；100 parts of citric acid；550~650 parts of sodium citrate；And other inevitable impurity.The preparation method of charcoal buffer, including at least following steps：A, after the removal of impurities of discarded maize straw, cleaning, air-dry, cutting, carbonization, cornstalk biological charcoal is made；B, the acidifying of cornstalk biological charcoal will be made in step a, obtains being acidified cornstalk biological charcoal；C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1~6:1:5.5~6.5 ratio is well mixed, and the biomass carbon buffer is made.The beneficial effects of the invention are as follows：The Cr (VI) in underground water can be effectively removed, application method is simple, and adsorbent is easily separated and does not introduce other metal ions.
Description
Technical field
The present invention relates to present invention relates particularly to biomass carbon sewage treatment area, more particularly to biomass carbon buffer and
Its preparation method.
Background technology
In China《Heavy metal pollution integrated control " 12 " is planned》In, chromium is listed in the heavy metal element of emphasis prevention and control
One of.Chromium is mainly derived from the industrial wastewaters such as dyeing, plating, process hides, pigment and photographic material, mainly with Cr (III) and Cr
(VI) valence state is present.Chromium is the essential trace elements of the human body, during it has substantial connection with lipid metabolism, but chromium can excessively cause
Poison.It is generally acknowledged that Cr (III) toxicity is little, and easily forms alkaline sedimentation in water and reduces migration in the environment, institute
It is smaller to endanger.And Cr (VI) toxicity is strong, and there is strong oxidizing property, there is violent corrosivity to skin, mucous membrane, in Yi Shui
Dissolving is present, and migration is strong in the environment etc., and harm is larger.Done therefore, it is necessary to work out a kind of processing for removing Cr (VI)
Method.
The main side that absorption method is handled by its efficient, easy and selectivity the advantages of good as current heavy metal water pollution
One of method, but the adsorbent price industrially used at present is costly, adds the cost of absorption method popularization.Develop honest and clean
Valency, efficient and non-secondary pollution water treatment absorbent turn into an important side of absorption research and heavy metal water pollution control
To.
Because raw material is cheap and easy to get, and with reference area is big, porosity is high, it is alkaline, easily adsorb SOM
The features such as, charcoal is increasingly becoming the study hotspot of absorption method in recent years, a kind of adsorbent can be used as to reduce transportable in water
The content of heavy metal ion.Have some researchs at present to show to utilize the lifes such as the preparation such as peanut shell, rice straw and maize straw
Thing charcoal has good adsorption effect to the heavy metal in water body, and can by charcoal is modified or surface modification come
Improve its suction-operated.
China is large agricultural country, can produce more than 800,000,000 tons of stalk every year.All kinds of agricultural crop straw yield are every year in Liaoning Province
32000000 tons, wherein maize straw accounts for 60%.Maize straw can be widely applied to raise as a kind of important natural resources
The many aspects such as material, the energy, returning to the field, but its scale of construction is big, is distributed the features such as wide brings difficulty to recycling.It is superfluous at present
Deng maize straw more burn fish field or it is at random be stacked in village, turn into an important factor for causing haze and rural environmental pollution.
Therefore, the Ministry of Agriculture in 2017 " the Northeast's stalk comprehensive utilization action will be carried out " and be classified as " agriculture Green Development five is taken action greatly " it
One.
Therefore, one kind can not only fast and efficiently Cr (VI) in Adsorption water, and will not being caused to wastewater pH larger
The biomass carbon of influence turns into the key solved the problems, such as.
The content of the invention
As the result of various extensive and careful research and experiment, present inventors have found that：By what is discarded
Maize straw can improve the unit structure of biological carbon surface, so as to improve Cr in water water body after carbonization, activation process
(VI) adsorption capacity, it is best to Cr (VI) treatment effect when pH is 5~6.
One object of the present invention provides a kind of charcoal buffer, and it has good energy of adsorption to the Cr (VI) in water
Power.
One object of the present invention provides a kind of preparation of charcoal charcoal buffer, does not introduce other polluters,
Cr (VI) can be efficiently separated, after reaction terminates and is easy to remove.
To achieve the above object, the present invention provides a kind of biomass carbon buffer, including：
100~600 parts of acidifying cornstalk biological charcoal；
100 parts of citric acid；
550~650 parts of sodium citrate；
And other inevitable impurity.
Preferably, including：
100 parts of acidifying cornstalk biological charcoal；
100 parts of citric acid；
600 parts of sodium citrate；
And other inevitable impurity.
A kind of preparation method of biomass carbon buffer described in any one as described above, comprises the following steps：
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 8~12cm maize straw section is cut into, then by corn stalk
Stalk section is placed in drying box in 55~65 DEG C, dries 22~26h；The maize straw section after drying is put into tube-type atmosphere furnace again
In, at the uniform velocity heat up, at 400~800 DEG C, 100~140min is carbonized under oxygen free condition, be cooled to room temperature taking-up, pulverize and sieve, make
Obtain cornstalk biological charcoal；
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：In 8~12 sulfuric acid solutions being added to, 50~70
DEG C modified 3~5h of concussion, is washed with deionized water to neutrality after heating, is dried to constant weight, be put into tube-type atmosphere furnace, at the uniform velocity
Heating, at 400~800 DEG C, 25~35min is activated under oxygen free condition, be cooled to room temperature taking-up, obtain being acidified cornstalk biological
Charcoal；
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1~6:1:5.5~6.5 ratio is mixed
Close uniform, the obtained biomass carbon buffer；
Wherein, wherein, the programming rate at the uniform velocity to be heated up described in the step a and step b is 8~12 DEG C/min；
The volume fraction of sulfuric acid solution described in step b is 5%~30%.
Preferably, maize straw section is placed in drying box again in step a and dries 24h in 60 DEG C；The carbon in step a
The temperature of change is 700 DEG C, time 120min.
Preferably, in stepb, the solid-to-liquid ratio 1 of the cornstalk biological charcoal and sulfuric acid solution：10.
Preferably, in stepb, the modified temperature of the concussion is 60 DEG C, time 4h.
Preferably, in stepb, activation temperature is 600 DEG C, time 30min.
Preferably, in step a, the sieving was 100 mesh sieves.
Preferably, in step a, the atmosphere in the tube-type atmosphere furnace is nitrogen.
Preferably, in addition to：Biomass carbon buffer packing is put into non-woven bag, seals, absorption is made
Wrap standby.
The beneficial effects of the invention are as follows：The Cr (VI) in underground water can be effectively removed, application method is simple；Adsorb
Cheng Hou, absorption bag is pulled out, it is easily separated and do not introduce other metal ions；It is cheap to be acidified cornstalk biological carbon feedstock, prepares
Technique is simple, and can repeatedly recycle.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, to make those skilled in the art's reference say
Bright book word can be implemented according to this.
Embodiment 1
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：10 volume fractions being added to 10% sulfuric acid
In solution, the modified 4h of 60 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 10 DEG C/in speed, 30min is activated under 700 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:6 ratio is well mixed, system
Obtain the biomass carbon buffer.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 2
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 8cm maize straw section is cut into, then by maize straw section
It is placed in drying box and dries 22h in 65 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 12 DEG C/min's
Speed is at the uniform velocity heated up, and at 800 DEG C, under oxygen free condition, 100min is carbonized in nitrogen atmosphere, is cooled to room temperature taking-up, is pulverized and sieved,
Cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：8 volume fractions being added to 5% sulfuric acid it is molten
In liquid, the modified 3h of 70 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace,
At the uniform velocity heated up with 12 DEG C/in speed, 25min is activated under 800 DEG C, oxygen free condition, be cooled to room temperature taking-up, it is beautiful to obtain acidifying
Rice straw biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:6.5 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 3
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 12cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 26h in 55 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 8 DEG C/min
Speed at the uniform velocity heat up, at 400 DEG C, under oxygen free condition, 140min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：12 volume fractions being added to 30% sulfuric acid
In solution, the modified 5h of 50 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 8 DEG C/in speed, 35min is activated under 400 DEG C, oxygen free condition, be cooled to room temperature taking-up, be acidified
Cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:5.5 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 4
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 9cm maize straw section is cut into, then by maize straw section
It is placed in drying box and dries 23h in 58 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 11 DEG C/min's
Speed is at the uniform velocity heated up, and at 500 DEG C, under oxygen free condition, 130min is carbonized in nitrogen atmosphere, is cooled to room temperature taking-up, is pulverized and sieved,
Cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：9 volume fractions being added to 20% sulfuric acid
In solution, the modified 4.5h of 55 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tubular type atmosphere
In stove, at the uniform velocity heated up with 11 DEG C/in speed, 28min is activated under 500 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain
It is acidified cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 3:1:6.1 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 5
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 11cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 25h in 62 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 9 DEG C/min
Speed at the uniform velocity heat up, at 650 DEG C, under oxygen free condition, 110min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：11 volume fractions being added to 15% sulfuric acid
In solution, the modified 4.8h of 65 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tubular type atmosphere
In stove, at the uniform velocity heated up with 9 DEG C/in speed, 32min is activated under 650 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 2:1:5.9 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 6
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10.5cm maize straw section is cut into, then by corn stalk
Stalk section is placed in drying box dries 22.5h in 60.5 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with
9.5 DEG C/min speed is at the uniform velocity heated up, and at 750 DEG C, under oxygen free condition, 125min is carbonized in nitrogen atmosphere, room temperature is cooled to and takes
Go out, pulverize and sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：10 volume fractions being added to 25% sulfuric acid
In solution, the modified 4.6h of 58 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tubular type atmosphere
In stove, at the uniform velocity heated up with 9.5 DEG C/in speed, 31min is activated under 750 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain
It is acidified cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 4:1:5.9 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.
Embodiment 7
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 9.5cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24.5h in 62.5 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 11.5
DEG C/min speed at the uniform velocity heats up, at 680 DEG C, under oxygen free condition, 128min is carbonized in nitrogen atmosphere, is cooled to room temperature taking-up,
Pulverize and sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：8.5 volume fractions being added to 8% sulfuric acid
In solution, the modified 4.4h of 59 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tubular type atmosphere
In stove, at the uniform velocity heated up with 11.5 DEG C/in speed, 33min is activated under 680 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain
To acidifying cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 3:1:5.9 ratio is well mixed,
The biomass carbon buffer is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 1
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 2
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 20cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 12h in 80 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 20 DEG C/min
Speed at the uniform velocity heat up, at 300 DEG C, under oxygen free condition, 50min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 3
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 5cm maize straw section is cut into, then by maize straw section
It is placed in drying box and dries 30h in 50 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 5 DEG C/min's
Speed is at the uniform velocity heated up, and at 850 DEG C, under oxygen free condition, 150min is carbonized in nitrogen atmosphere, is cooled to room temperature taking-up, is pulverized and sieved,
Cornstalk biological charcoal is made.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 4
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：7 volume fractions being added to 40% sulfuric acid
In solution, the modified 2h of 40 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 10 DEG C/in speed, 20min is activated under 850 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:6 ratio is well mixed, system
Obtain the biomass carbon buffer.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 5
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：15 volume fractions being added to 3% sulfuric acid
In solution, the modified 6h of 80 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 10 DEG C/in speed, 40min is activated under 350 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:6 ratio is well mixed, system
Obtain the biomass carbon buffer.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 6
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：10 volume fractions being added to 10% sulfuric acid
In solution, the modified 4h of 60 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 10 DEG C/in speed, 30min is activated under 700 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:1:3 ratio is well mixed, system
Obtain the biomass carbon buffer.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Comparative example 7
A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 10cm maize straw section is cut into, then by maize straw
Section is placed in drying box dries 24h in 60 DEG C；The maize straw section after drying is put into tube-type atmosphere furnace again, with 10 DEG C/min
Speed at the uniform velocity heat up, at 700 DEG C, under oxygen free condition, 120min is carbonized in nitrogen atmosphere, be cooled to room temperature taking-up, crushed
Sieve, cornstalk biological charcoal is made.
B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：10 volume fractions being added to 10% sulfuric acid
In solution, the modified 4h of 60 DEG C of concussions, it is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace
In, at the uniform velocity heated up with 10 DEG C/in speed, 30min is activated under 700 DEG C, oxygen free condition, be cooled to room temperature taking-up, obtain acid
Change cornstalk biological charcoal.
C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1:3:3 ratio is well mixed, system
Obtain the biomass carbon buffer.
D, biomass carbon buffer packing is put into non-woven bag, sealed, it is standby that absorption bag is made.Test data
The biomass carbon buffer as made from embodiment 1-7 and comparative example 1-7 is removed according to charcoal liquor ratio 1：160 ratio adds
In pending underground water, adsorb 24 hours, the pH and Cr (VI) of the underground water after detection absorption clearance are (known to treat respectively
The initial concentration for handling Cr (VI) in underground water is 50mg/L).
Table 1
| Project | PH value after absorption | Absorptivity % |
| Embodiment 1 | 6.2 | 95.28 |
| Embodiment 2 | 5.8 | 90.01 |
| Embodiment 3 | 5.5 | 85.16 |
| Embodiment 4 | 5.8 | 88.17 |
| Embodiment 5 | 5.9 | 93.49 |
| Embodiment 6 | 6.0 | 94.11 |
| Embodiment 7 | 5.7 | 91.78 |
| Comparative example 1 | 6.8 | 45.68 |
| Comparative example 2 | 6.8 | 38.32 |
| Comparative example 3 | 6.8 | 39.21 |
| Comparative example 4 | 6.5 | 73.20 |
| Comparative example 5 | 6.5 | 63.93 |
| Comparative example 6 | 4.8 | 98.57 |
| Comparative example 7 | 3.3 | 99.65 |
It has been investigated that when the pH value of water body is in the range of 3.0~6.0, the Cr (VI) in water body turns to Cr (III)
Change, and pH is lower, and conversion ratio is higher, but low pH adsorption conditionses can cause absorption to terminate rear water environment acidifying, cause environment and
The secondary pollution of ecology.When the ratio of citric acid and sodium citrate is 1：When in the range of 5.5~6.5, make Cr (VI) to Cr (III)
Conversion ratio maintain higher level, pH is returned to 5.5~6.5 after absorption, maintains the stability of Water pH.
It can be seen that the absorption property of the biomass carbon after acidified activation process significantly increases by comparative example 1-3.
Boehm titration results show the biomass carbon surface oxyacid group content increase after acidifying, and specific surface area and pore analysis show
Show the biomass carbon porosity increase of acidifying activation process, specific surface area increase, these can promote biomass carbon to Cr
(III) absorption.The Cr (III) that Cr (VI) is converted into constantly is adsorbed by biomass carbon, causes Cr in water (III) content to drop
It is low, conversion reaction is continued positive progress, so as to improve Cr (VI) clearance.
By table one, it can be seen that, the biomass carbon buffer prepared according to the inventive method has good suction to Cr (VI)
Attached effect.
As described above, a kind of biomass carbon buffer of the present invention, can effectively remove Cr in underground water (VI)；Adsorption bar
Part is gentle, and will not introduce other heavy metal ion, causes secondary pollution；Pulling absorption bag after the completion of absorption out can be by adsorbent
Separated from water body, be adapted to the in-situ treatment of water body；Acidifying cornstalk biological carbon feedstock is cheap, and preparation technology is simple,
And can repeatedly it recycle
Although embodiment of the present invention is disclosed as above, it is not restricted to listed fortune in bright book and embodiment
With it can be applied to various suitable the field of the invention completely, can be easily real for those skilled in the art
Now other modification, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited to
Specific details.
Claims (10)
- A kind of 1. biomass carbon buffer, it is characterised in that including：100~600 parts of acidifying cornstalk biological charcoal；100 parts of citric acid；550~650 parts of sodium citrate；And other inevitable impurity.
- 2. biomass carbon buffer as claimed in claim 1, it is characterised in that including：100 parts of acidifying cornstalk biological charcoal；100 parts of citric acid；600 parts of sodium citrate；And other inevitable impurity.
- 3. the preparation method of a kind of biomass carbon buffer as any one of claim 1-2, it is characterised in that described Method comprises the following steps：A, after the removal of impurities of discarded maize straw, cleaning, air-dry, 8~12cm maize straw section is cut into, then by maize straw section It is placed in drying box in 55~65 DEG C, dries 22~26h；The maize straw section after drying is put into tube-type atmosphere furnace again, it is even Speed heating, at 400~800 DEG C, 100~140min is carbonized under oxygen free condition, be cooled to room temperature taking-up, pulverize and sieve, jade is made Rice straw biological charcoal；B, cornstalk biological charcoal will be made in step a with solid-to-liquid ratio 1：In 8~12 sulfuric acid solutions being added to, 50~70 DEG C of shakes Modified 3~5h is swung, is washed with deionized water after heating to neutrality, is dried to constant weight, be put into tube-type atmosphere furnace, at the uniform velocity risen Temperature, at 400~800 DEG C, 25~35min is activated under oxygen free condition, be cooled to room temperature taking-up, obtain being acidified cornstalk biological Charcoal；C, cornstalk biological charcoal will be first acidified with citric acid and sodium citrate according to 1~6:1:5.5~6.5 ratio mixing is equal It is even, the biomass carbon buffer is made；Wherein, the programming rate at the uniform velocity to be heated up described in the step a and step b is 8~12 DEG C/min；Institute in stepb The volume fraction for stating sulfuric acid solution is 5%~30%.
- 4. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：Again by corn in step a Stalk section is placed in drying box dries 24h in 60 DEG C；The temperature being carbonized in step a is 700 DEG C, time 120min.
- 5. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：In stepb, the corn The solid-to-liquid ratio 1 of straw biological charcoal and sulfuric acid solution：10.
- 6. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：In stepb, the concussion Modified temperature is 60 DEG C, time 4h.
- 7. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：In stepb, activation temperature For 600 DEG C, time 30min.
- 8. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：In step a, the sieving To cross 100 mesh sieves.
- 9. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：In step a, the tubular type Atmosphere in atmosphere furnace is nitrogen.
- 10. the preparation method of biomass carbon buffer as claimed in claim 3, it is characterised in that：Also include：By the biology The packing of matter charcoal buffer is put into non-woven bag, is sealed, and it is standby that absorption bag is made.
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| CN108751390A (en) * | 2018-07-17 | 2018-11-06 | 江苏嘉泽环境发展有限公司 | A kind of algal control formula biologic packing material, preparation method and its application |
| CN109534430A (en) * | 2018-11-28 | 2019-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilize the method for modified walnut shell charcoal processing heavy metal waste liquid |
| CN112239259A (en) * | 2020-08-24 | 2021-01-19 | 中南大学 | A kind of chemical remover for heavy metal pollution wastewater treatment and preparation method and application thereof |
| CN114477355A (en) * | 2022-01-06 | 2022-05-13 | 中国电建集团华东勘测设计研究院有限公司 | An infiltration reaction wall coupled with oxygenation and adsorption that can improve the purification ability of river banks and its application |
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| CN108751390A (en) * | 2018-07-17 | 2018-11-06 | 江苏嘉泽环境发展有限公司 | A kind of algal control formula biologic packing material, preparation method and its application |
| CN109534430A (en) * | 2018-11-28 | 2019-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilize the method for modified walnut shell charcoal processing heavy metal waste liquid |
| CN112239259A (en) * | 2020-08-24 | 2021-01-19 | 中南大学 | A kind of chemical remover for heavy metal pollution wastewater treatment and preparation method and application thereof |
| CN112239259B (en) * | 2020-08-24 | 2021-12-21 | 中南大学 | A kind of chemical remover for heavy metal pollution wastewater treatment and preparation method and application thereof |
| CN114477355A (en) * | 2022-01-06 | 2022-05-13 | 中国电建集团华东勘测设计研究院有限公司 | An infiltration reaction wall coupled with oxygenation and adsorption that can improve the purification ability of river banks and its application |
| CN114477355B (en) * | 2022-01-06 | 2023-12-29 | 中国电建集团华东勘测设计研究院有限公司 | Oxygenation and adsorption coupled permeation reaction wall capable of improving river bank pollution cleaning capacity and application |
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Application publication date: 20180227 |