CN109777424A - A kind of preparation method for the stabilizer being passivated heavy metal in soil - Google Patents
A kind of preparation method for the stabilizer being passivated heavy metal in soil Download PDFInfo
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- CN109777424A CN109777424A CN201910021420.0A CN201910021420A CN109777424A CN 109777424 A CN109777424 A CN 109777424A CN 201910021420 A CN201910021420 A CN 201910021420A CN 109777424 A CN109777424 A CN 109777424A
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- 239000002689 soil Substances 0.000 title claims abstract description 68
- 239000003381 stabilizer Substances 0.000 title claims abstract description 58
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 230000006641 stabilisation Effects 0.000 claims abstract description 12
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000011105 stabilization Methods 0.000 claims abstract description 9
- 239000002210 silicon-based material Substances 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004131 Bayer process Methods 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- 229910052725 zinc Inorganic materials 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 238000007711 solidification Methods 0.000 abstract description 6
- 230000008023 solidification Effects 0.000 abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- 229910052793 cadmium Inorganic materials 0.000 abstract description 3
- 229910052745 lead Inorganic materials 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- 239000011133 lead Substances 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- 230000035558 fertility Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000010564 aerobic fermentation Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 231100000704 bioconcentration Toxicity 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of preparation methods of stabilizer for being passivated heavy metal in soil, belong to the regeneration field of soil-stabilising material and contaminated soil.It is high for medicament price existing for conventional stabilizer, stabilize after soil solidification, be difficult to the problems such as reclaiming, the present invention uses raw material for from a wealth of sources, cheap and some is the alkali metal oxide and silicon-containing compound of industrial waste, with pollution treatment of giving up, have the characteristics that not destroy good soil texture, stabilization effect, supplement silicon source, promotion crop yield, can stable soil Heavy Metals, inhibit absorption of the crop to heavy metal, heavy metal-polluted soil bioavailability is reduced, and soil acidity can be improved.Operation of the present invention method is simple, practical, applied widely, has good stabilisation repairing effect for the Compound Heavy Metals soil such as Cu, Pb, Zn, Cd, Cr.
Description
Technical field
The present invention relates to a kind of preparation methods of stabilizer for being passivated heavy metal in soil, belong to soil-stabilising material and dirt
The regeneration field of the soil of dye.
Background technique
Heavy metal-polluted soil has generality, persistence, hidden or latency, refractory organics, irreversibility, indirect hazard
Property, property easy to migrate, bioconcentration and the characteristics of bio-toxicity, be important environment poisonous and harmful substance, to human health and
Ecological environment causes huge threat.
Heavy metal-polluted soil, which stabilizes to repair, refers to the addition heavy metal stabilization medicament in contaminated soil, by adsorbing, sinking
The series reactions such as shallow lake, complexing, ion exchange and redox change the existing forms of heavy metal contaminants in the soil, subtract
The Leaching of few harmful constituent, migration, biological effectiveness, to reach repairing effect.Stabilization technology is applied widely,
It is simple process, easy to operate, potentiality are also had a wide range of applications in heavy metal pollution site remediation field, with low to soil remediation
The demand of the widespread demand of cost technology, inexpensive stabilization technology is consequently increased.
Existing stabilization technology mainly uses the substances such as carbonate, phosphate, silicate, is formed not after adding stabilizer
Molten or sl. sol. heavy metal precipitation form exists, and 103834410 A of CN discloses a kind of heavy metal curing agent and uses the huge sum of money
Belong to the method for curing agent solidification and stabilization heavy metal-polluted soil, the heavy metal curing agent is by flyash, cement, carbide slag and modulus
2.0 sodium silicate preparation, using a part of trade waste, the treatment of wastes with processes of wastes against one another, solidification effect is preferable, in the hydration reaction of cement
Under effect, it is closed in the harmful substance in contaminated soil inside solidified body, thus reach innoxious, stabilized purpose,
But the soil being fully cured is difficult to planting plants；107955626 A of CN disclose stabilizer, stabilizer preparation method and repair
The method of multiple heavy-metal contaminated soil, stabilizer is by montmorillonite, diatomite, phosphate, potassium sulfide, magnesia, metal chelating agent
Be made, stable complexing encapsulating substances can be formed, reach good stablizing effect, but need to be added in montmorillonite sodium hydroxide into
Row is modified, and sodium hydroxide has strong basicity, is easy to appear burn seedlings, is reduced situations such as p fertilizer efficiency；107722987 A of CN is disclosed
A kind of metal ion stabilizer preparing and its controlling the mixing of sawdust, bean cake and chaff warm to the restorative procedure of arable soil
Degree, humidity, aerobic fermentation under the conditions of existing for the withered grass bacterium, obtain metal ion stabilizer, do not need special machinery or
The excessive labour of person implements extensive earth work, but as the operation as pesticide of peasant household's sowing fertilizers, but stabilizer
Amount of application is larger, and influences vulnerable to weather.
There is the soil hardening after stabilizing in existing stabilizer or solidification is serious, it is difficult to change plant growth or stabilizer
Become soil physico-chemical property, reduce soil fertility, treatment effect and treatment agent it is affected by environment it is big, additive amount of medicament is big etc. lacks
Point.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of stabilizer for being passivated heavy metal in soil, the stabilizer is logical
It crosses pyroreaction or compressive reaction is prepared, the raw material composition of the stabilizer are as follows: the alkali that mass percent is 20~40%
Metal oxide and 60~80% silicon-containing compound.
Preferably, alkali metal oxide described before pyroreaction of the present invention or compressive reaction is dried through 120~130 DEG C
It is dry, 90% is milled to by 150~100 meshes, and silicon-containing compound is milled to 90% by 150~100 meshes.
Preferably, pyroreaction of the present invention are as follows: raw material reacts at a temperature of 1300~1400 DEG C after weighing proportionally
10~15 min generate Pickering agent, and heating is dissolved in water and generates liquid stabilisers, and stabilizer and water are 1:25 in mass ratio.
Preferably, compressive reaction of the present invention are as follows: raw material reacts 10 ~ 15 under 2~3 atmospheric pressure after weighing proportionally
Min directly generates liquid stabilisers.
Preferably, alkali metal oxide of the present invention is Bayer process red mud, red mud from sintering process, combination method red mud, ammonia alkali
Several mixtures of one of waste residue, chlor-alkali waste residue, alkali blast furnace slag, steel slag or arbitrary proportion.
Preferably, silicon-containing compound of the present invention is ceramic polished waste residue, flyash, diamond slag, SILICA FUME, stone
Several mixtures of one of sand, silica gel, bentonite or arbitrary proportion.
Preferably, the stabilizer amount of application of the present invention is 10~15 kgs/acre, and when application need to use liquid stabilisers
Or the suspension that Pickering agent and water 1:25 in mass ratio are formed is applied.
The molecular formula of stabilizer of the present invention is R2O·nSiO2, the R in formula is alkali metal, and coefficient n is known as stabilizer mould
Number, is the molecular proportion (or molar ratio) of the oxide containing silicon and alkali metal oxide in stabilizer；Stabilizer modulus is generally 1.5
Between~3.5, n is bigger, and Pickering agent is more insoluble in water, and normal-temperature water can dissolve when n is 1, and n need to be heated when increasing could be molten
Solution needs the steam of 4 atmospheric pressure or more that could dissolve when n is greater than 3, and n is bigger, and Si oxide content is more, easily decomposes hardening,
Stabilizer viscosity increases, and is also easier to cause to solidify.
The principle of the present invention: what alkali metal oxide was selected in raw material of the invention is the higher industrial residue of alkalinity,
Alkaline environment required for stabilizer preparation process is provided, and can play the role of adjusting soil pH, these alkali metal oxides
, also there is preferable fixation performance in the surface-active site contained to heavy metal ions in soil Pb, Zn, Cd, Cu etc., makes it from can
Swap status is changed into bonding oxide state, to make the activity of the heavy metal ion in soil and reactivity reduce, no
Phosphorus, calcium, magnesium, potassium element can also be provided in same alkali metal oxide, is conducive to microbial activities and the growth of plant；Siliceous chemical combination
Silicate in object is dissolved and is released the anion of free state silicon under the conditions of alkaline environment, can with it is molten in soil
Heavy metal cation out reacts, and increases the adsorbance of heavy metal ion thus to reduce moving for heavy metal ions in soil
It moves and converts, so that the heavy metal in heavy-metal contaminated soil is obtained solidification and stabilization, also introduce element silicon for soil；Stabilizer
The presence of middle silicate can preferably adhere to and capture heavy metal ions in soil, so that heavy metal ion be made to be solidificated in gel
In matrix, to play the role of solidification and stabilization.
Beneficial effects of the present invention:
(1) heavy metal stabilizer of the invention prepares raw material sources than wide, and price is lower, for the common raw material of industry or
Solid waste, it is cheap and easily-available, it is not required to that basic agent is added, with pollution treatment of giving up, there is good economic benefit.It is unfavorable to soil after addition
Influence small, can increase soil fertility, supplement silicon source simultaneously promotes crop yield, can stable soil Heavy Metals, inhibit crop pair
The absorption of heavy metal reduces heavy metal-polluted soil bioavailability, and can improve soil acidity.
(2) heavy metal stabilizer of the invention stabilisation operating method is simple, practical, applied widely, by medicament
It mixes and is added in soil with water, and the curing time after dispensing is short；A huge sum of money may be implemented in heavy metal stabilizer of the invention
The high stable of category effectively prevents the anti-molten of heavy metal ion and exudation；Wide spectrum of the medicament obtained to target contaminant
Property, and have good stabilisation repairing effect for Compound Heavy Metals soil such as Cu, Pb, Zn, Cd, Cr.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
It is spare that Bayer process red mud is milled to 150 mesh after 130 DEG C of drying, weighs 40 kg of Bayer process red mud, and 150 mesh are ceramic polished useless
Slag 60 kg, it is levigate mix thoroughly after, 10 min are reacted at 1400 DEG C, reaction generates Pickering agent, and heating for dissolving is made in water
The mass ratio of liquid stabilisers, stabilizer and water is 1:25, and the stabilizer amount of application is 14 kgs/acre, is supported after imposing on soil
14 d are protected, heavy metal in soil content is detected, stablizing rate for examination Cadium In Polluted Soil, chromium, copper, lead and zinc is respectively
83.14%, 81.24%, 86.31%, 87.13% and 82.48%；Soil aciditiy weakens, and the crops of plantation can be made to increase
Produce 5.8%.
Embodiment 2
It is spare that ammonia alkali waste residue is milled to 150 mesh after 130 DEG C of drying, weighs 35 kg, 150 mesh flyash 65 kg, it is levigate mix thoroughly after,
React 10 min at 1350 DEG C, reaction generates Pickering agent, dissolve by heating and be made liquid stabilisers in water, stabilizer with
The mass ratio of water is 1:25.The stabilizer amount of application is 14 kgs/acre, conserves 14d after imposing on soil, detects a huge sum of money in soil
Belong to content, for examination Cadium In Polluted Soil, chromium, copper, lead and zinc stablize rate be respectively 82.60%, 83.35%, 87.12%,
89.38% and 81.84%；Soil aciditiy weakens, and can make the increasing crop yield 5.4% of plantation.
Embodiment 3
It is spare that chlor-alkali waste residue is milled to 150 mesh after 130 DEG C of drying, weighs 30 kg, 150 mesh SILICA FUME 70 kg, it is levigate mix thoroughly after,
React 15 min at 1350 DEG C, reaction generates Pickering agent, dissolve by heating and be made liquid stabilisers in water, stabilizer with
The mass ratio of water is 1:25, and the stabilizer amount of application is 13 kgs/acre, conserves 14d after imposing on soil, detects a huge sum of money in soil
Belong to content, for examination Cadium In Polluted Soil, chromium, copper, lead and zinc stablize rate be respectively 82.99%, 85.64%, 86.12%,
89.64% and 87.24%；Soil aciditiy weakens, and can make the increasing crop yield 5.7% of plantation.
Embodiment 4
It is spare that alkali blast furnace slag is milled to 150 mesh after 130 DEG C of drying, weighs 25 kg, 150 mesh diamond slag, 75 kg, grinds
After carefully mixing thoroughly, 15 min are reacted under 2 atmospheric pressure, and liquid stabilisers are made, the stabilizer amount of application is 15 kgs/acre,
14d is conserved after imposing on soil, detects heavy metal in soil content, stablizes rate for examination Cadium In Polluted Soil, chromium, copper, lead and zinc
Respectively 84.82%, 82.11%, 88.48%, 85.35% and 86.55%；Soil aciditiy weakens, and can make the agriculture of plantation
Crop yield 5.9%.
Embodiment 5
It is spare that steel slag is milled to 150 mesh after 130 DEG C of drying, weighs 20 kg, 150 mesh bentonite 80 kg, it is levigate mix thoroughly after, in 3
10 min are reacted under a atmospheric pressure, liquid stabilisers are made, and the stabilizer amount of application is 10 kgs/acre, is supported after imposing on soil
14d is protected, heavy metal in soil content is detected, stablizing rate for examination Cadium In Polluted Soil, chromium, copper, lead and zinc is respectively
85.34%, 80.38%, 86.84%, 82.95% and 89.27%；Soil aciditiy weakens, and can make the increasing crop yield of plantation
6.1%。
Claims (7)
1. a kind of preparation method for the stabilizer for being passivated heavy metal in soil, it is characterised in that: anti-by pyroreaction or pressurization
It should be prepared, the raw material of stabilizer composition are as follows: alkali metal oxide that mass percent is 20~40% and 60~
80% silicon-containing compound；The molecular formula of the stabilizer is R2O·nSiO2, the R in formula is alkali metal, and n is stabilizer modulus,
N is 1.5~3.5.
2. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 1, it is characterised in that: pyroreaction
Or the alkali metal oxide is dried through 120~130 DEG C before compressive reaction, is milled to 90% by 150~100 meshes, silicide-comprising
It closes object and is milled to 90% by 150~100 meshes.
3. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 2, it is characterised in that: the high temperature
Reaction are as follows: raw material reacts 10~15 min at a temperature of 1300~1400 DEG C after weighing proportionally and generates Pickering agent, heating
It is dissolved in water and generates liquid stabilisers, the mass ratio of stabilizer and water is 1:25.
4. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 2, it is characterised in that: the pressurization
Reaction are as follows: raw material reacts 10 ~ 15 min under 2~3 atmospheric pressure after weighing proportionally, directly generates liquid stabilisers.
5. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 1, it is characterised in that: the alkali gold
Category oxide is Bayer process red mud, red mud from sintering process, combination method red mud, ammonia alkali waste residue, chlor-alkali waste residue, alkali blast furnace slag, steel
Several mixtures of one of slag or arbitrary proportion.
6. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 1, it is characterised in that: described siliceous
Compound is one of ceramic polished waste residue, flyash, diamond slag, SILICA FUME, quartz sand, silica gel, bentonite or appoints
Several mixtures of meaning ratio.
7. being passivated the preparation method of the stabilizer of heavy metal in soil according to claim 3, it is characterised in that: the stabilization
Agent amount of application is 10~15 kgs/acre.
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| CN110343528A (en) * | 2019-07-12 | 2019-10-18 | 河南省明创环境科技有限公司 | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle |
| CN110436806A (en) * | 2019-08-13 | 2019-11-12 | 西安建筑科技大学 | A kind of additive enhancing heavy metals immobilization effect and its application and application method |
| CN111100648A (en) * | 2019-12-13 | 2020-05-05 | 广东环境保护工程职业学院 | Heavy metal composite stabilizer and preparation method and application thereof |
| CN111205872A (en) * | 2020-01-16 | 2020-05-29 | 招商局生态环保科技有限公司 | Lead-polluted soil stabilization composite reagent and use method thereof |
| CN114085673A (en) * | 2021-11-30 | 2022-02-25 | 山东大学 | Prevention and control material for treating underground sewage and/or polluted soil as well as preparation method and application thereof |
| CN114479874A (en) * | 2022-01-28 | 2022-05-13 | 山东大学 | Red mud-based heavy metal curing agent and preparation method and application thereof |
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| CN115651663B (en) * | 2022-10-10 | 2024-04-12 | 昆明理工大学 | Heavy metal contaminated soil restoration agent and preparation method and application thereof |
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