CN105567248A - Soil heavy metal passivator and preparation method and application thereof - Google Patents
Soil heavy metal passivator and preparation method and application thereof Download PDFInfo
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- CN105567248A CN105567248A CN201610081198.XA CN201610081198A CN105567248A CN 105567248 A CN105567248 A CN 105567248A CN 201610081198 A CN201610081198 A CN 201610081198A CN 105567248 A CN105567248 A CN 105567248A
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- 239000002689 soil Substances 0.000 title claims abstract description 97
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002028 Biomass Substances 0.000 claims abstract description 29
- 239000003610 charcoal Substances 0.000 claims abstract description 28
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 24
- 239000008103 glucose Substances 0.000 claims abstract description 24
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 24
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 23
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010457 zeolite Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 10
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 5
- 239000011701 zinc Substances 0.000 claims abstract description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 42
- 235000010265 sodium sulphite Nutrition 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 15
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 12
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 12
- 239000000292 calcium oxide Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- -1 alpha-cylodextrin Substances 0.000 claims description 9
- 238000007158 vacuum pyrolysis Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000197 pyrolysis Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 32
- 239000010949 copper Substances 0.000 abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- 239000011133 lead Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005067 remediation Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 229920001450 Alpha-Cyclodextrin Polymers 0.000 abstract 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000002386 leaching Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 12
- 239000003814 drug Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 7
- 239000002910 solid waste Substances 0.000 description 6
- 230000007306 turnover Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000011109 contamination Methods 0.000 description 5
- 238000003900 soil pollution Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000009418 renovation Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 3
- 229920000858 Cyclodextrin Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000274 adsorptive effect Effects 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
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005186 environmental transport Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011835 investigation 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
- 238000005065 mining Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- YVGGHNCTFXOJCH-UHFFFAOYSA-N DDT Chemical compound C1=CC(Cl)=CC=C1C(C(Cl)(Cl)Cl)C1=CC=C(Cl)C=C1 YVGGHNCTFXOJCH-UHFFFAOYSA-N 0.000 description 1
- 206010033307 Overweight Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 235000020825 overweight Nutrition 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a heavy metal polluted soil remediation agent which is prepared from, by weight, 30-50% of biomass charcoal, 10-30% of alpha-cyclodextrins, 10-20% of zeolite, 5-10% of polyacrylamide, 5-10% of glucose and 5-10% of sodium sulphide. The preparation method comprises the steps that the biomass charcoal, the alpha-cyclodextrins, the zeolite, the polyacrylamide, the glucose and the sodium sulphide are evenly mixed according to the mass ratio, and therefore the soil remediation agent is prepared. The obtained soil remediation agent has the good effect on remedying cadmium, lead, zinc and copper composite polluted soil, and has the advantages that the method is simple and feasible, and the treatment effect is good.
Description
Technical field:
The invention belongs to soil pollution recovery technique field, be specifically related to a kind of soil heavy metal passivant and preparation method thereof and application.
Technical background:
Heavy metal pollution of soil becomes the focal issue of public concern gradually.
" national Soil Pollution Investigation publication " display within 2014, is announced: national edatope situation totally allows of no optimist according to Environmental Protection Department and Ministry of Land and Resources; some areas soil pollution is heavier; arable soil environmental quality causes anxiety, industry and mining discarded ground edatope outstanding problem.The human activity such as industry and mining, agricultural and Environmental Background Values of Soils height are the major causes causing soil pollution or exceed standard.Soil total exceeding standard rate in the whole nation is 16.1%, and wherein slightly, slightly, moderate and serious pollution point position ratio be respectively 11.2%, 2.3%, 1.5% and 1.1%.Pollution type is based on inorganic type, and organic type takes second place, and compound pollution proportion is less, and an inorganic pollutant figure place that exceeds standard accounts for 82.8% of all super punctuation bits.
From pollution distribution situation, soils in south china pollutes and overweights the north; The subregion soil contamination problem such as Yangtze River Delta, the Delta of the Pearl River, Northeastern rust belt are comparatively outstanding, and southwest, variable charge soil heavy metals exceeding standard scope is larger; Cadmium, mercury, arsenic, plumbous 4 kinds of level of inorganic contaminants distribution present the situation raised gradually from northwest to the southeast, from northeast to southwestward.
Principal pollutant are cadmium, nickel, copper, arsenic, mercury, lead, dichlorodiphenyl trichloroethane and polycyclic aromatic hydrocarbons.If be as the criterion with second national land investigation result, China's arable land latest data is 2,030,770,000 mu and calculates, and the cultivated area of middle serious pollution accounts for 2.9%, has reached 5,889 ten thousand mu.
Administering method at present for heavy metal pollution of soil mainly contains immobilization/stabilization, drip-rinsing process, washes local method, electromotion repairing technique method, chemical reduction method, phytoremediation, microorganism remediation, totally there is the problems such as remediation efficiency is low, processing cost is high.Traditional restorative procedure is as large in quantities such as landfill, drip washing, electrochemistry, and cost is high and usually cause Soil structure to destroy and some nutritive element loss.Therefore, develop a kind of low cost, simple, efficient, eco-friendly soil passivation medicament is significant.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of soil heavy metal passivant and preparation method thereof and application, the present invention adopts biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite to be mixed in proportion, make soil heavy metal passivant, add to by a certain percentage in heavy-metal contaminated soil according to pollution level, reacted by the heavy metal in the synergy such as absorption, precipitation, chelating and soil, heavy metal is made to form stable chemical form, stop its environmental transport and transfer and diffusion, reduce heavy metal murder by poisoning degree in the environment.
For solving the problems of the technologies described above, the invention provides a kind of soil heavy metal passivant, its raw material is made up of biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite, and the weight percent of each raw material of described soil-repairing agent is:
Biomass charcoal 30-50%;
Alpha-cylodextrin 10-30%;
Zeolite 10-20%;
Polyacrylamide 5-10%
Glucose 5-10%;
Sodium sulphite 5-10%;
The mass percent sum of each raw material is 100%;
Described biomass charcoal is for raw material with the mixture of stalk and calcium oxide, the mass ratio of described stalk and calcium oxide is 20:1, system pressure be 20kPa, pyrolysis temperature be the condition of 500 DEG C under vacuum pyrolysis 30min, the particle diameter obtained by milled processed is the pressed powder of below 3mm;
Further, in described renovation agent, the mass percent of each raw material is:
Biomass charcoal 40%;
Alpha-cylodextrin 20%;
Zeolite 10%;
Polyacrylamide 10%
Glucose 10%;
Sodium sulphite 10%;
Described alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite are respectively the pressed powder of below 2mm;
A kind of soil heavy metal passivant of the present invention, by biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite being mixed according to the above ratio, stirs, and namely obtains repairing medicament.
A kind of heavy-metal contaminated soil renovation agent of the present invention, after obtaining mixture by said process, add in heavy-metal contaminated soil, the reparation pharmaceutical quantities of adding is the 1-10% of contaminated soil weight, then sprays a small amount of water and make Soil conservation moistening.
This medicament may be used for the improvement of single heavy metal contaminated soil, also the improvement of Compound Heavy Metals is applicable to, be applicable to the reparation of big area heavy-metal contaminated soil, comprise the mine reparation of heavy metal contamination and the reparation of heavy metal use manufacturing enterprise contaminated site.Compared with prior art, reparation medicament of the present invention has the advantage that preparation method is simple, feasible, regulation effect is good.
Relative to prior art, beneficial effect of the present invention is:
Biomass charcoal in renovation agent is obtained by vacuum pyrolysis biomass, and biomass charcoal porosity obtained is under vacuum high, and adsorptive value is high; With biomass such as stalks for raw material, make full use of resource, avoid causing environmental pollution because of its burning.Promote that the output of stalk charcoal in the process of vacuum pyrolysis increases by adding calcium oxide, the biomass charcoal obtained by vacuum pyrolysis, has specific surface area large, and duct is enriched, and easily all kinds of heavy metal ion of absorption, reduces the concentration of transport property heavy metal ion in soil; Calcium oxide self in obtained biomass charcoal can make soil pH value improve soil surface negative charge to be increased, thus the affinity of soil heavy metal increases; On the other hand pH value raises, and is also conducive to the existence of MOH+ and improves the adsorptive capacity of heavy metal ion, impels heavy metal in soil to form oxyhydroxide or combined precipitation or co-precipitation simultaneously.
Polyacrylamide is high molecular polymer, has good water-soluble, nontoxic, non-corrosiveness, can improve the physicals of soil, increase soil macro aggregate number, improve soil hydraulic and water content, slow down depletion, soil can be allowed fully to contact with passivator; In addition, polyacrylamide has carboxyl and amide group isoreactivity group, by forming coordinate bond with the metal ion on soil particle surface, has the synergy making stable chromium ion;
Glucose is a kind of natural high moleculer eompound, and be the abundantest renewable material of one in nature source, degradable, can not to environment.The hydroxyl and glycosidic link that can react in a large number is there is, adsorbable a large amount of heavy metal ion in its molecular chain;
Sodium sulphite can react with exchangeable species heavy metal ion and form stable chemical form, stops its environmental transport and transfer and diffusion, reduces heavy metal murder by poisoning degree in the environment.
Alpha-cylodextrin is the cone tubular molecule be made up of glucose ring, is made up of six glucose glycan molecules.Be hydrophobic region in cyclodextrin cylinder, drum diameter is about 0.6nm, has the molecule or group that hold the lyophobic dust that other shapes and size are applicable to and embeds in hole, the characteristic of formation inclusion compound.Cyclodextrin Adsorption of Heavy Metal Ions and organic pollutant, undertaken by tetra-inclusion complex substantially.Alpha-cylodextrin can directly and heavy metal ion coordination generate multi-nuclear metal compound.
Except said components absorption separately, inclusion, precipitation, sequestering action, zeolite and adding of biomass charcoal can improve soil physico-chemical property well, greatly strengthen the permeability of soil, in the edatope having water, each component synergy of passivator, to greatest extent with soil contact reacts.
Play synergy by said components, the leaching yield of heavy metal in soil is reduced greatly, reach and be better than the primary standard of country " standard of soil environment quality " (GB15618-1995).
Embodiment:
Contaminated soil in following embodiment is taken from the same area and is polluted plot, and pollution level is identical.
Embodiment 1
Test soil collecting is from certain heavy metal contamination region, and the heavy metal content in this regional soil top layer is higher than the grade III Standard of " standard of soil environment quality " (GB15618-1995).Practical situation according to polluting are repaired:
(a), sample from soil, detect and adopt turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect preprosthetic heavy metal-polluted soil concentration;
B prepared by (), soil-repairing agent: with the mixture of stalk and calcium oxide for raw material, the mass ratio of described stalk and calcium oxide is 20:1, system pressure be 20kPa, pyrolysis temperature be the condition of 500 DEG C under vacuum pyrolysis 30min, the particle diameter obtained by milled processed is the biomass charcoal powder of below 3mm; Be retrieved as the pulverous alpha-cylodextrin of below 2mm, zeolite, polyacrylamide, glucose, sodium sulphite.By biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite ratio is as following weight percent mixed:
Biomass charcoal 40%;
Alpha-cylodextrin 20%;
Zeolite 10%;
Polyacrylamide 10%
Glucose 10%;
Sodium sulphite 10%;
Stir, namely complete preparation, obtain repairing medicament.
(c), heavy-metal contaminated soil is dug out, send into crusher in crushing, through Belt Conveying to mixing tank, reparation medicament for soil quality 10% is fully mixed with contaminated soil, in mixing process, spraying a small amount of water makes Soil conservation moistening, leaves standstill 10 days, namely complete reparation after mixing.
(d), effect detection: sample from the soil after reparation, detecting adopts turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect the heavy metal-polluted soil concentration after repairing, result is as shown in table 1:
Table 1
| Embodiment 1 | Cadmium (Cd) | Plumbous (Pb) | Zinc (Zn) | Copper (Cu) |
| Before process (mg/kg) | 31.3 | 632.1 | 320.2 | 136.3 |
| After process (mg/kg) | 0.0072 | 0.0108 | 0.0926 | 0.0156 |
Cadmium in Soil after reparation, lead, zinc, copper content meet the primary standard of " standard of soil environment quality " (GB15618-1995).
Embodiment 2
Test soil collecting is from certain heavy metal contamination region, and the heavy metal content in this regional soil top layer is higher than the grade III Standard of " standard of soil environment quality " (GB15618-1995).Practical situation according to polluting are repaired:
(a), sample from soil, detect and adopt turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect preprosthetic heavy metal-polluted soil concentration;
B prepared by (), soil-repairing agent: with the mixture of stalk and calcium oxide for raw material, the mass ratio of described stalk and calcium oxide is 20:1, system pressure be 20kPa, pyrolysis temperature be the condition of 500 DEG C under vacuum pyrolysis 30min, the particle diameter obtained by milled processed is the biomass charcoal powder of below 3mm; Be retrieved as the pulverous alpha-cylodextrin of below 2mm, zeolite, polyacrylamide, glucose, sodium sulphite.By biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite ratio is as following weight percent mixed:
Biomass charcoal 50%;
Alpha-cylodextrin 10%;
Zeolite 20%;
Polyacrylamide 10%
Glucose 5%;
Sodium sulphite 5%;
Stir, namely complete preparation, obtain repairing medicament.
(c), heavy-metal contaminated soil is dug out, send into crusher in crushing, through Belt Conveying to mixing tank, reparation medicament for soil quality 10% is fully mixed with contaminated soil, in mixing process, spraying a small amount of water makes Soil conservation moistening, leaves standstill 10 days, namely complete reparation after mixing.
(d), effect detection: sample from the soil after reparation, detecting adopts turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect the heavy metal-polluted soil concentration after repairing, result is as shown in table 2:
Table 2
| Embodiment 2 | Cadmium (Cd) | Plumbous (Pb) | Zinc (Zn) | Copper (Cu) |
| Before process (mg/kg) | 31.3 | 632.1 | 320.2 | 136.3 |
| After process (mg/kg) | 0.0131 | 0.0212 | 0.135 | 0.0253 |
Cadmium in Soil after reparation, lead, zinc, copper content meet the primary standard of " standard of soil environment quality " (GB15618-1995).
Embodiment 3
Test soil collecting is from certain heavy metal contamination region, and the heavy metal content in this regional soil top layer is higher than the grade III Standard of " standard of soil environment quality " (GB15618-1995).Practical situation according to polluting are repaired:
(a), sample from soil, detect and adopt turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect preprosthetic heavy metal-polluted soil concentration;
B prepared by (), soil-repairing agent: with the mixture of stalk and calcium oxide for raw material, the mass ratio of described stalk and calcium oxide is 20:1, system pressure be 20kPa, pyrolysis temperature be the condition of 500 DEG C under vacuum pyrolysis 30min, the particle diameter obtained by milled processed is the biomass charcoal powder of below 3mm; Be retrieved as the pulverous alpha-cylodextrin of below 2mm, zeolite, polyacrylamide, glucose, sodium sulphite.By biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite ratio is as following weight percent mixed:
Biomass charcoal 50%;
Alpha-cylodextrin 10%;
Zeolite 20%;
Polyacrylamide 10%
Glucose 5%;
Sodium sulphite 5%;
Stir, namely complete preparation, obtain repairing medicament.
(c), heavy-metal contaminated soil is dug out, send into crusher in crushing, through Belt Conveying to mixing tank, reparation medicament for soil quality 10% is fully mixed with contaminated soil, in mixing process, spraying a small amount of water makes Soil conservation moistening, leaves standstill 10 days, namely complete reparation after mixing.
(d), effect detection: sample from the soil after reparation, detecting adopts turnover oscillator to carry out leaching test to soil according to solid waste " Leaching leaching method sulfonitric method " (HJ/T299-2007), detect the heavy metal-polluted soil concentration after repairing, result is as shown in table 3:
Table 3
| Embodiment 3 | Cadmium (Cd) | Plumbous (Pb) | Zinc (Zn) | Copper (Cu) |
| Before process (mg/kg) | 31.3 | 632.1 | 320.2 | 136.3 |
| After process (mg/kg) | 0.0220 | 0.0311 | 0.0831 | 0.0359 |
Cadmium in Soil after reparation, lead, zinc, copper content meet the primary standard of " standard of soil environment quality " (GB15618-1995).
Claims (5)
1. a soil heavy metal passivant, is characterized in that: raw material is made up of biomass charcoal, alpha-cylodextrin, zeolite, polyacrylamide, glucose, sodium sulphite, and the weight percent of each raw material of described soil-repairing agent is:
Biomass charcoal 30-50%;
Alpha-cylodextrin 10-30%;
Zeolite 10-20%;
Polyacrylamide 5-10%
Glucose 5-10%;
Sodium sulphite 5-10%;
The mass percent sum of each raw material is 100%;
Described biomass charcoal is for raw material with the mixture of stalk and calcium oxide, the mass ratio of described stalk and calcium oxide is 20:1, system pressure be 20kPa, pyrolysis temperature be the condition of 500 DEG C under vacuum pyrolysis 30min, the particle diameter obtained by milled processed is the pressed powder of below 3mm.
2. a kind of soil heavy metal passivant according to claim 1, is characterized in that: the mass percent of each raw material of described soil-repairing agent is:
Biomass charcoal 40%;
Alpha-cylodextrin 20%;
Zeolite 10%;
Polyacrylamide 10%
Glucose 10%;
Sodium sulphite 10%.
3. a kind of soil heavy metal passivant according to claim 1 and 2, is characterized in that: the alpha-cylodextrin in described soil-repairing agent, zeolite, polyacrylamide, glucose, sodium sulphite are respectively the pressed powder that particle diameter is less than 2mm.
4. the preparation method of a kind of soil heavy metal passivant described in claims 1 to 3 any one, it is characterized in that: by described raw material in mass ratio example for biomass charcoal: alpha-cylodextrin: zeolite: polyacrylamide: glucose: sodium sulphite=30-50%:10-30%:10-20%:5-10%:5-10%:5-10% Homogeneous phase mixing, namely obtains soil heavy metal passivant.
5. a kind of soil heavy metal passivant according to claims 1 to 3 any one is repairing the application in cadmium, lead, zinc, cuprum compound polluted soil.
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| CN106433662A (en) * | 2016-08-26 | 2017-02-22 | 黄建辉 | Efficient soil remediator |
| CN106433663A (en) * | 2016-08-26 | 2017-02-22 | 黄建辉 | Soil remediation agent for treating heavy metal pollution |
| CN106590673A (en) * | 2016-11-22 | 2017-04-26 | 浙江科技学院 | Soil conditioner for repairing heavy metal polluted farmland and production method of same |
| CN108440207A (en) * | 2018-05-17 | 2018-08-24 | 辽宁大学 | A kind of composite soil conditioner and preparation method thereof suitable for Coal Mine soil |
| CN109382402A (en) * | 2017-08-03 | 2019-02-26 | 中国石油化工股份有限公司 | The method and its application of petroleum hydrocarbon in a kind of removal soil |
| CN110523762A (en) * | 2019-08-20 | 2019-12-03 | 北京上水环境科技发展有限公司 | A kind of administering method of alkaline land soil heavy metal pollution |
| CN111659361A (en) * | 2020-03-04 | 2020-09-15 | 湖北大学 | Peptide calcium salt foam adsorbent and application thereof |
| CN112779018A (en) * | 2020-08-19 | 2021-05-11 | 甘肃省地质矿产勘查开发局第三地质矿产勘查院 | Soil pollution remediation reagent |
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| CN108440207A (en) * | 2018-05-17 | 2018-08-24 | 辽宁大学 | A kind of composite soil conditioner and preparation method thereof suitable for Coal Mine soil |
| CN110523762A (en) * | 2019-08-20 | 2019-12-03 | 北京上水环境科技发展有限公司 | A kind of administering method of alkaline land soil heavy metal pollution |
| CN111659361A (en) * | 2020-03-04 | 2020-09-15 | 湖北大学 | Peptide calcium salt foam adsorbent and application thereof |
| CN112779018A (en) * | 2020-08-19 | 2021-05-11 | 甘肃省地质矿产勘查开发局第三地质矿产勘查院 | Soil pollution remediation reagent |
| CN114276816A (en) * | 2021-12-16 | 2022-04-05 | 佛山市铁人环保科技有限公司 | Site soil heavy metal passivator and preparation method thereof |
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