CN107699251A - The fluorite cream base passivator and preparation method of a kind of heavy metal pollution agricultural land soil - Google Patents
The fluorite cream base passivator and preparation method of a kind of heavy metal pollution agricultural land soil Download PDFInfo
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- CN107699251A CN107699251A CN201711047766.5A CN201711047766A CN107699251A CN 107699251 A CN107699251 A CN 107699251A CN 201711047766 A CN201711047766 A CN 201711047766A CN 107699251 A CN107699251 A CN 107699251A
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- cream base
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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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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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
- C09K2101/00—Agricultural use
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of fluorite cream base passivator of heavy metal pollution agricultural land soil, the raw material based on fluorgypsum, 30 ~ 45min is mixed after adding blast furnace manganese mud, slag, white clay, phosphorus mine tailing, shelving adds additive after 24 hours, compound is entered into ball mill grinding 40min again, is prepared into fluorite cream base passivator.Application of the present invention by above-mentioned fluorite cream base passivator on heavy metal pollution agricultural land soil, a kind of described fluorite cream base passivator is according in every mu of polluted agricultural land solid, water：Solid masses ratio carries out being mixed into slurries for 0.65, contaminated soil surface uniformly will be sprayed to, then using rotary cultivator rotary tillage to contaminated soil depth bottom, rotary tillage pass is no less than 6 times, ensure that fluorite cream base passivator and contaminated soil are well mixed, overlay film is closed again, and curing at moisture-retention and heat-insulation samples after many 14 days carries out repairing effect detection.Raw material is mainly discarded object, to environment non-secondary pollution, improves the utilization rate of the industrial residues such as fluorgypsum.
Description
Technical field
Patent of the present invention is related to a kind of fluorite cream base passivator, based on fluorgypsum, admixture certain proportion ground blast furnace manganese
The grindings such as slag, ground steel slag, phosphorus mine tailing, white clay, additive mix, can efficient repairing heavy metal pollution farmland obtained by preparing
The fluorite cream base passivator of soil.
Background technology
Heavy metal pollution of soil refer to due to mankind's activity or naturally caused by activity toxic heavy metal element in soil
Content exceedes soil background value itself, too high levels caused by excess deposition, and accumulates to a certain extent, destroys soil oneself
Right poised state, the phenomenon for causing soil quality to deteriorate or fail.It, which pollutes, has that scope is wide, the time is long, disguised, stably
Property, not irreversibility, biodegradable, not only result in the drastically drop of the serious degeneration of soil, crop products and quality
It is low, and be easy to be enriched with vivo and enter food chain, finally it is absorbed by the body and endangers health.Environmental Protection in China portion
The national Soil Pollution Investigation publication of 2014 shows that soil quality overall state allows of no optimist, which part Pb,
The heavy metal pollutions such as zinc, chromium, mercury protrude, and there is an urgent need to carry out the work of these Polluted area soil remediations.It is heavy metal-polluted both at home and abroad
It is many to contaminate soil restoring technology, is generally divided into physical restoration, chemical restoration, biological restoration and agricultural engineering technology reparation
Etc. several classes, this few class restorative procedure respectively has its pros and cons, and the research and development of wherein heavy-metal contaminated soil repair materials are recovery techniques
It is crucial.
Fluorgypsum is caused trade waste in Acid of Hydrofluoric Acid Production, China's newly-increased 3,760,000 tons of fluorgypsum in 2010, is added
Upper fluorgypsum discarded over the years, total amount does not only take up a large amount of soils more than 30,000,000 tons, due to containing remaining hydrofluoric acid and sulfuric acid, corruption
Corrosion is strong, especially institute's fluoride ion, easily into water body, severe environments can be caused to endanger after excessive buildup.Plus fluorgypsum
Middle impurity is more, complicated component and main component are the reasons such as the extremely slow anhydrous gypsum of aquation, causes it to have a strong impact on environment and profit
Big with difficulty, only the traditional field such as plastering gupsum, cement retarder part is studied at present, and its utilization ways and utilization rate are very
It is low.
Certain Acid of Hydrofluoric Acid Production company is derived from, outward appearance is light gray, and below grain diameter 0.38mm accounts for 63%, 0.38mm and arrived
1mm accounts for 28%, and maximum particle diameter 30mmpH values 2.10, its chemical composition and mineral composition analysis etc. are as follows：
The fluorgypsum chemical composition (mass percent) of table 1
The content of the invention
It is an object of the invention to raw material based on being by fluorgypsum, stirred after addition blast furnace manganese mud, slag, white clay mixed
Close, it is levigate fully excite compound activity, add a kind of fluorite cream base passivator that additive is prepared, raw material is fluorgypsum
Trade waste, have the characteristics that consumption it is discarded object amount is big, cost is cheap, repairs that speed is fast, repairing effect is good, be a kind of sexual valence
Than high heavy-metal contaminated soil renovation agent.
The present invention is realized in above-mentioned purpose：A kind of fluorite cream base passivator, its component include fluorgypsum, Blast Furnace Manganese
Slag, slag, phosphorus mine tailing, white clay and additive, by weight percentage, fluorgypsum are 30~60%, and blast furnace manganese mud is 15
~25%, slag 15~25%, phosphorus mine tailing 5~15%, white clay 3.0~5.0%, additive 1%~3%.
Through further preferably proportioning：By weight percentage, fluorgypsum 45%, blast furnace manganese mud are 20%, slag
18%, phosphorus mine tailing 10%, white clay 4.0%, additive 3%.
Described original state fluorgypsum particle diameter is less than 1.25mm, and it is CaO, SO that its composition, which mainly includes,3, CaF2。
Described blast furnace manganese mud is residue caused by smelting manganese-series ferroalloy, and grinding to specific surface area is more than after drying
200m2/ kg, its composition mainly include CaO, Al2O3, SiO2。
Described slag is the waste residue discharged in steelmaking process, and grinding to specific surface area is more than 200m after drying2/ kg,
It is CaO, Fe that its composition, which mainly includes,2O3, Al2O3, SiO2,MgO。
Trade waste, original state phosphorus mine tailing grain are selected in the subdivision that described phosphorus mine tailing is discharged when being levigate phosphorus ore, flotation concentrate
Footpath is less than 1.25mm, and it is CaO, MgO, P that its composition, which mainly includes,2O5, Al2O3, SiO2。
Described white clay is chemical pulping black liquor using caused a kind of solid waste during combustion method recovery caustic soda
Thing, particle diameter is crushed after drying and is less than 1.25mm, it is CaO, SiO that its composition, which mainly includes,2。
Additive is by 10%~25% carboxymethyl cellulose, 6%~10% neopelex, 5%~9% 12
Alcohol, 16%~45% acetyl lauryl amine, 30%~40% melamine are combined.
The present invention also provides a kind of preparation method of fluorite cream base passivator, and the preparation method of fluorite cream base passivator is：
The raw material based on fluorgypsum, 30~45min, shelving 24 are mixed after adding blast furnace manganese mud, slag, white clay, phosphorus mine tailing
Additive is added after hour, then compound is entered into ball mill grinding 40min, is prepared into fluorite cream base passivator.
Application of the fluorite cream base passivator obtained using above-mentioned preparation method on heavy metal pollution agricultural land soil, tool
Body method is according to every mu of polluted agricultural land 400kg~1500kg solids, water by fluorite cream base passivator：Solid masses ratio is 0.65
Mixed and quickly stirred 10~30 minutes and be prepared into slurries, uniformly contaminated soil surface will be sprayed to, then using rotary tillage
Machine rotary tillage to contaminated soil depth bottom, rotary tillage pass is no less than 6 times, ensures that fluorite cream base passivator and contaminated soil mixing are equal
It is even, then overlay film closing, curing at moisture-retention and heat-insulation samples after many 14 days carries out repairing effect detection.
Original state fluorgypsum main component is anhydrous gypsum, a small amount of residual fluorite and sulfuric acid etc., and wherein anhydrous gypsum is to belong to
For γ variants, lateral reactivity is very high, and blast furnace manganese mud, slag, phosphorus mine tailing etc. are rich in the component of sial base, slag and white clay etc.
Contain the strong alkaline substances such as calcium oxide.Original state fluorgypsum grinding after being stirred with blast furnace manganese mud, slag, phosphorus mine tailing etc.,
The reaction such as neutralization, a certain amount of complicated mineral disaggregation occurs, improves release sial base in blast furnace manganese mud, slag, phosphorus mine tailing
Active mineral content, the fracture of Si-O and Al-O keys and structural rearrangement occur after slurry is prepared into, vitreum depolymerization, can produce
Largely there is the hydrated products such as the hydrated calcium silicates, entringite, zeolites of gelling adsorption capacity, the free state remained in phosphorus mine tailing
P2O5Chemical reaction occurs in the presence of water with calcic alkaline matter into materials such as brushites；Plus containing in phosphorus mine tailing
Residual apatite, residual sulfuric acid calcium etc. after the calcium carbonate and hydration reaction that remain in white clay, be that heavy-metal contaminated soil mixes
After conjunction, the sediment with high stability is formed because dissolubility difference heavy metal ion is easy to replacement wherein calcium ion, water
Change calcium silicates, entringite, zeolites, the hydrated product such as brushite can also occur with heavy metal ion strong absorption, surface complexation,
Lattice ion such as exchanges at the complicated physical-chemical reaction, and heavy metal ion is securely fixed and wraps up, adsorb in hydrated product
Portion, while also release produces a certain amount of bubble to additive in aquation in fluorite cream base passivator, and farmland is distributed in by stirring
Between soil particle, interstices of soil rate is improved, is reduced because hydration and sclerosis brings the hardened phenomenon of soil.
Advantages of the present invention：(1) fluorite cream base passivator heavy metal pollution agricultural land soil, the range of decrease under heavy metal-polluted soil concentration
Degree is big, without it is hardened, the time is short, quality is recovered；(2)) raw material is mainly that the small power consumption of discarded object, cost is low, to environment without secondary
Pollution；(3) utilization rate of the industrial residues such as fluorgypsum is improved, the new of high performance-price ratio is provided for fluorgypsum recycling
Approach.(4) present invention process is simple, easy to operate, is adapted to extensive use.
Brief description of the drawings
Fig. 1 original state fluorgypsum SEM spectrums.
Fig. 2 original state fluorgypsum XRD spectrums.
Fig. 3 original state fluorgypsum FTIR collection of illustrative plates.
Embodiment
Embodiment 1：
Fluorite cream base passivator matches：Based on 30% fluorgypsum, addition 24% blast furnace manganese mud, 25% slag,
30~45min is mixed after 15% phosphorus mine tailing, 3.0% white clay, shelving adds 3% additive (25% carboxymethyl after 24 hours
Cellulose, 10% neopelex, 9% lauryl alcohol, 16% acetyl lauryl amine, 40% melamine are combined), then
Compound is entered into ball mill grinding 40min, is prepared into fluorite cream base passivator.
Certain polluted farmland soil content of beary metal such as following table, add in contaminated soil and carry out according to every mu of 1100kg passivator
Repair, the OH under water dissolution such as slag and white clay-Meeting dissolution, the basicity of solution improve rapidly, promote nothing in fluorgypsum
H 2 O calcium sulphate dissolving, Ca2+And SO4 2-Into solution, at the same also promote the blast furnace manganese mud of partial activation in grinding, slag and
Largely the vitreous structure rich in siulica-alumina mineral destroys in phosphorus mine tailing, makes moisture be easier to cause into inside infiltration particle
It occurs the hydrated mineral of continuous mineral disaggregation, more silicon, aluminium and iron and enters solution, accelerates network-like hydrated calcium silicate to coagulate
The formation of the mineral such as glue, tip-like ettringite and honeycomb-shaped zeolite class, while also have more sheet brushite etc.
Hydrated product generates, and heavy metal ion adsorb its surface by force and occurs that lattice ion exchange etc. is physico by these materials occur
Reaction is learned, heavy metal ion is securely fixed and wrapped up, is adsorbed inside hydrated product, at the same it is additional in fluorite cream base passivator
The complex superposition such as carboxymethyl cellulose, lauryl alcohol, melamine also forms the larger stable bubble of mobility in aquation in agent,
Soil particle is uniformly distributed, improves soil fine pore density.Take maintenance after predetermined age reparation sample according to《Solid waste
Leaching leaching method》(GB5086-1997) and《Solid waste Leaching assay method》(GB/T15555-1995) etc.
The concentration of heavy metal in standard test leachate, and be converted into soil lead tolerance (mg/kg), then basis《Soil environment quality
Standard》(GB15618-2008) carry out discriminating and be satisfied by the limit value requirement of corresponding heavy metal paddy field and nonirrigated farmland.
As a result it is as follows：
Embodiment 2：
Fluorite cream base passivator matches：Based on 50% fluorgypsum, 16% blast furnace manganese mud of addition, 22% slag, 6%
30~45min is mixed after phosphorus mine tailing, 5.0% white clay, shelving adds 1% additive (15% carboxymethyl cellulose after 24 hours
Element, 8% neopelex, 5% lauryl alcohol, 40% acetyl lauryl amine, 32% melamine are combined), then will be mixed
Conjunction expects, into ball mill grinding 40min, to be prepared into fluorite cream base passivator.
Certain polluted farmland soil content of beary metal such as following table, add in contaminated soil and carry out according to every mu of 980kg passivator
Repair, the OH under water dissolution such as slag and white clay-Meeting dissolution, the basicity of solution improve rapidly, promote nothing in fluorgypsum
H 2 O calcium sulphate dissolving, Ca2+And SO4 2-Into solution, at the same also promote the blast furnace manganese mud of partial activation in grinding, slag and
Largely the vitreous structure rich in siulica-alumina mineral destroys in phosphorus mine tailing, makes moisture be easier to cause into inside infiltration particle
It occurs the hydrated mineral of continuous mineral disaggregation, more silicon, aluminium and iron and enters solution, accelerate thread hydrated calcium silicate gel,
The formation of the mineral such as long bar-shaped ettringite and honeycomb-shaped zeolite class, while also have the aquations such as more sheet brushite
Product generates, and heavy metal ion adsorb its surface by force and occurs that the physical chemistry such as lattice ion exchange are anti-by these materials occur
, heavy metal ion should be securely fixed and wrapped up, adsorbed inside hydrated product, a large amount of excessive middle dead plasters are also formed
Long bar-shaped calcium sulphate dihydrate crystal absorption heavy metal ion or directly and heavy metal ion such as lead ion occur displacement react, by its
It is directly translated into indissoluble material, while carboxymethyl cellulose, lauryl alcohol, melamine etc. in additive in fluorite cream base passivator
Complex superposition also forms the stable bubble of good fluidity in aquation, is uniformly distributed soil particle, improves soil fine pore
Density.
Take maintenance after predetermined age reparation sample according to《Solid waste Leaching leaching method》(GB5086-1997)
And《Solid waste Leaching assay method》Etc. (GB/T15555-1995) in standard test leachate heavy metal concentration, and
Soil lead tolerance (mg/kg) is converted into, then basis《Standard of soil environment quality》(GB15618-2008) differentiated full
The corresponding heavy metal paddy field of foot and the requirement of nonirrigated farmland limit value.As a result it is as follows：
Embodiment 3：
Fluorite cream base passivator matches：Based on 45% fluorgypsum, addition 20% blast furnace manganese mud, 18% slag,
30~45min is mixed after 10% phosphorus mine tailing, 4.0% white clay, shelving adds 3% additive (by 20% carboxylic first after 24 hours
Base cellulose, 7% neopelex, 6% lauryl alcohol, 33% acetyl lauryl amine, 34% melamine are combined),
Compound is entered into ball mill grinding 40min again, is prepared into fluorite cream base passivator.
Certain polluted farmland soil content of beary metal such as following table, add in contaminated soil and carry out according to every mu of 850kg passivator
Repair, the OH under water dissolution such as slag and white clay-Meeting dissolution, the basicity of solution improve rapidly, promote nothing in fluorgypsum
H 2 O calcium sulphate dissolving, Ca2+And SO4 2-Into solution, at the same also promote the blast furnace manganese mud of partial activation in grinding, slag and
Largely the vitreous structure rich in siulica-alumina mineral destroys in phosphorus mine tailing, makes moisture be easier to cause into inside infiltration particle
It occurs the hydrated mineral of continuous mineral disaggregation, more silicon, aluminium and iron and enters solution, accelerate thread hydrated calcium silicate gel,
The formation of the mineral such as long bar-shaped ettringite and honeycomb-shaped zeolite class, while also have the aquations such as more sheet brushite
Product generates, and heavy metal ion adsorb its surface by force and occurs that the physical chemistry such as lattice ion exchange are anti-by these materials occur
, heavy metal ion should be securely fixed and wrapped up, adsorbed inside hydrated product, excessive middle dead plaster also forms long rod
Shape calcium sulphate dihydrate crystal adsorbs heavy metal ion or directly displacement occurs and reacts, its is direct with heavy metal ion such as lead ion
Indissoluble material is changed into, a small amount of excessive middle dead plaster also forms long bar-shaped calcium sulphate dihydrate crystal absorption heavy metal ion
Or directly displacement reaction occurs, is directly translated into indissoluble material with heavy metal ion such as lead ion.Fluorite cream base is blunt simultaneously
Also formation mobility is larger in aquation for the complex superposition such as carboxymethyl cellulose, lauryl alcohol, melamine in additive in agent
Stable bubble, be uniformly distributed soil particle, improve soil fine pore density.Take maintenance after predetermined age reparation sample by
According to《Solid waste Leaching leaching method》(GB5086-1997) and《Solid waste Leaching assay method》(GB/
) etc. T15555-1995 in standard test leachate heavy metal concentration, and be converted into soil lead tolerance (mg/kg), then basis
《Standard of soil environment quality》(GB15618-2008) carry out discriminating and be satisfied by the limit value requirement of corresponding heavy metal paddy field and nonirrigated farmland.Knot
Fruit is as follows：
Embodiment 4：
Fluorite cream base passivator matches：Based on 60% fluorgypsum, 15% blast furnace manganese mud of addition, 15% slag, 5%
30~45min is mixed after phosphorus mine tailing, 3.0% white clay, shelving adds 2% additive after 24 hours (fine by 10% carboxymethyl
Dimension element, 6% neopelex, 9% lauryl alcohol, 45% acetyl lauryl amine, 30% melamine are combined), then will
Compound enters ball mill grinding 40min, is prepared into fluorite cream base passivator.
Certain polluted farmland soil content of beary metal such as following table, add in contaminated soil and carry out according to every mu of 1200kg passivator
Repair, the OH under water dissolution such as slag and white clay-Meeting dissolution, the basicity of solution improve rapidly, promote nothing in fluorgypsum
H 2 O calcium sulphate dissolving, Ca2+And SO4 2-Into solution, at the same also promote the blast furnace manganese mud of partial activation in grinding, slag and
Largely the vitreous structure rich in siulica-alumina mineral destroys in phosphorus mine tailing, makes moisture be easier to cause into inside infiltration particle
It occurs the hydrated mineral of continuous mineral disaggregation, more silicon, aluminium and iron and enters solution, accelerate thread hydrated calcium silicate gel,
The formation of the mineral such as long bar-shaped ettringite and honeycomb-shaped zeolite class, while also have the aquations such as more sheet brushite
Product generates, and heavy metal ion adsorb its surface by force and occurs that the physical chemistry such as lattice ion exchange are anti-by these materials occur
, heavy metal ion should be securely fixed and wrapped up, adsorbed inside hydrated product, a large amount of excessive middle dead plasters are also formed
Long bar-shaped calcium sulphate dihydrate crystal absorption heavy metal ion or directly and heavy metal ion such as lead ion occur displacement react, by its
It is directly translated into indissoluble material, while carboxymethyl cellulose, lauryl alcohol, melamine etc. in additive in fluorite cream base passivator
Complex superposition also forms the stable bubble of good fluidity in aquation, is uniformly distributed soil particle, improves soil fine pore
Density.Take maintenance after predetermined age reparation sample according to《Solid waste Leaching leaching method》(GB5086-1997) and
《Solid waste Leaching assay method》Etc. (GB/T15555-1995) in standard test leachate heavy metal concentration, and change
Soil lead tolerance (mg/kg) is counted as, then basis《Standard of soil environment quality》(GB15618-2008) discriminating is carried out to be satisfied by
Corresponding heavy metal paddy field and the requirement of nonirrigated farmland limit value.As a result it is as follows：
Claims (10)
- A kind of 1. fluorite cream base passivator of heavy metal pollution agricultural land soil, it is characterised in that：By weight percentage, fluorgypsum For 30 ~ 60%, blast furnace manganese mud is 15 ~ 25%, slag 15 ~ 25%, phosphorus mine tailing 5 ~ 15%, white clay 3.0 ~ 5.0%, additive 1% ~ 3%.
- 2. fluorite cream base passivator according to claim 1, it is characterised in that：Each raw materials by weight meter, fluorite Cream is 45%, and blast furnace manganese mud is 20%, slag 18%, phosphorus mine tailing 10%, white clay 4.0%, additive 3%.
- 3. fluorite cream base passivator according to claim 1, it is characterised in that：Original state fluorgypsum particle diameter is less than 1.25mm, It is CaO, SO that its composition, which mainly includes,3, CaF2。
- 4. fluorite cream base passivator according to claim 1, it is characterised in that：Described blast furnace manganese mud is smelting manganese-series Residue caused by ferroalloy, grinding to specific surface area is more than 200m after drying2/ kg, its composition mainly include CaO, Al2O3, SiO2。
- 5. fluorite cream base passivator according to claim 1, it is characterised in that：Described slag in steelmaking process by arranging The waste residue gone out, grinding to specific surface area is more than 200m after drying2/ kg, it is CaO, Fe that its composition, which mainly includes,2O3, Al2O3, SiO2, MgO。
- 6. fluorite cream base passivator according to claim 1, it is characterised in that：Described phosphorus mine tailing is that phosphorus ore is levigate, floating Trade waste is selected in the subdivision discharged during concentrate selection, and original state phosphorus taillings particle size is less than 1.25mm, and it is CaO that its composition, which mainly includes, MgO, P2O5, Al2O3, SiO2。
- 7. fluorite cream base passivator according to claim 1, it is characterised in that：Described white clay is chemical pulping black liquor Using caused a kind of solid waste during combustion method recovery caustic soda, particle diameter is crushed after drying and is less than 1.25mm, its composition It is main to include being CaO, SiO2。
- 8. fluorite cream base passivator according to claim 1, it is characterised in that：Additive is by 10% ~ 25% carboxymethyl cellulose Element, 6% ~ 10% neopelex, 5% ~ 9% lauryl alcohol, 16% ~ 45% acetyl lauryl amine, 30% ~ 40% melamine it is compound and Into.
- 9. a kind of preparation method of fluorite cream base passivator, it is characterised in that the preparation method of fluorite cream base passivator is：With fluorine Raw material based on gypsum, 30 ~ 45min is mixed after adding blast furnace manganese mud, slag, white clay, phosphorus mine tailing, shelving is after 24 hours Additive is added, then compound is entered into ball mill grinding 40min, is prepared into fluorite cream base passivator.
- A kind of 10. application of fluorite cream base passivator on heavy metal pollution agricultural land soil, it is characterised in that：A kind of described fluorine Gypsum base passivator is according to every mu of polluted agricultural land 400kg ~ 1500kg solids, water：Solid masses ratio for 0.65 mix simultaneously fast Speed stirring is prepared into slurries in 10 ~ 30 minutes, uniformly contaminated soil surface will be sprayed to, then using rotary cultivator rotary tillage to Polluted Soil Earth depth bottom, rotary tillage pass are no less than 6 times, ensure that fluorite cream base passivator and contaminated soil are well mixed, then overlay film closing, Curing at moisture-retention and heat-insulation samples after many 14 days carries out repairing effect detection.
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| CN111517618A (en) * | 2020-02-01 | 2020-08-11 | 广东泉兴生态科技有限公司 | Method for quickly using town sludge as backfill soil for construction land |
| CN114832792A (en) * | 2022-04-27 | 2022-08-02 | 山东微观生态研究中心有限公司 | Heavy metal trapping agent, preparation method and application thereof in industrial sewage treatment |
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