CN108372202A - A method of the reparation medicament for administering heavy-metal contaminated soil and its improvement heavy-metal contaminated soil - Google Patents
A method of the reparation medicament for administering heavy-metal contaminated soil and its improvement heavy-metal contaminated soil Download PDFInfo
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- CN108372202A CN108372202A CN201810290994.3A CN201810290994A CN108372202A CN 108372202 A CN108372202 A CN 108372202A CN 201810290994 A CN201810290994 A CN 201810290994A CN 108372202 A CN108372202 A CN 108372202A
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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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- 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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/10—Cements, e.g. Portland cement
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Abstract
The invention discloses a kind of method for repairing medicament and its administer heavy-metal contaminated soil for administering heavy-metal contaminated soil, the raw material repaired medicament and include following weight percent：Oxidant is 1 10%；Fe-base compound is 30 70%；Modified mineral materials are 10 60%；PH adjusting agent 10 40%.Each raw material is milled into granularity respectively, and in the material of 10 200 mesh, then mixing can be obtained in proportion.When the improvement for repairing medicament for counterweight contaminated soil, operating method is easy, and regulation effect is notable.The present invention repairs medicament and is enriched compared to the raw material sources of traditional medicament, cheap, is suitble to large-scale promotion application.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of reparation medicament for administering heavy-metal contaminated soil
And its method for administering heavy-metal contaminated soil.
Background technology
Arsenic is a kind of to be widely present and carcinogenic nonmetalloid in nature.The various activities of the mankind, such as dig up mine, smelt,
Apply fertilizer, stacked using insecticide, discharge of wastewater and waste residue etc., cause local soil arsenic, lead, nickel, cadmium content to increase.Arsenic is to agriculture
It is 3mg/L that crop, which generates toxic action minimum concentration, also very big to the toxicity of aquatile.Arsenic and arsenide can generally pass through
The approach such as water, air and food enter human body, cause damages.Thus, arsenic pollution has become the whole world and endangers extremely serious environment
One of problem.
With industrial or agricultural development and the chemical substance containing arsenic it is widely used, arsenic exploitation, processing, use, waste processing
Deng during, make in a large amount of arsenic residual to soil, causes in world wide arsenic pollution phenomenon generally existing in soil.Arsenic pair
The harm of human health is very big, and when high concentration can kill cell or even threat to life immediately.Therefore the improvement of As polluted soil
And it repairs and receives more and more attention.
The recovery technique of heavy-metal contaminated soil mainly has chemical leaching, plant absorption, stabilisation/solidification, electro reclamation
Deng.Wherein, chemical leaching operation difficulty is big, easy tos produce secondary pollution, and the phytoremediation period is long, electrokinetic remediation efficiency is low, at
This height, thus engineer application is fewer.In comparison, stabilisation/curing technology has at low cost, efficient, operability
The advantages that strong, is widely used in the reparation of heavy-metal contaminated soil.Stabilization/solidification method is the work for changing waste residue using additive
The process of journey characteristic (such as permeability, compressibility and intensity), even if waste is transformed into the process of not flowable solid.
Common stabilization/curing additive is calcium salt, molysite, magnesium salts, aluminium salt and sulfide etc., and reaction condition is usually in aqueous solution
In, generate relatively stable arsenic calcium slag, arsenic scum, arsenic magnesium slag etc..The stability of arsenic calcium slag is relatively low and dissolubility is higher, therefore single
It is solely bad using dearsenification effect.
Invention content
In order to solve the above technical problems, the present invention provides a kind of reparation medicaments for administering heavy-metal contaminated soil
And its method for administering heavy-metal contaminated soil.The raw material for repairing medicament is extensive, prepares simple, easy for operation, effect
Rate is high, regulation effect is good.
The technical solution that the present invention takes is：
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：
It is described repair medicament preparation method be：By each raw material be milled into respectively granularity be 10-200 mesh material, by than
Example is uniformly mixed.
The oxidant is any one in potassium ferrate, sodium hypochlorite, potassium hyperchlorate, potassium permanganate, ammonium persulfate
Or it is a variety of, it is preferably one or more in sodium hypochlorite, potassium permanganate, ammonium persulfate.
The Fe-base compound be ferric sulfate, iron chloride, ferric nitrate, frerrous chloride, in ferrous sulfate any one or
It is a variety of, preferably ferric sulfate and/or ferrous sulfate.
The modified mineral materials are iron-based modified mineral materials.
In the iron-based modified mineral materials, mineral material is portland cement, active pozzolans, bentonite, diatom
Any one or more of soil, kaolin, attapulgite, zeolite etc..
The preparation method of the iron-based modified mineral materials is：By mineral material with etc. quality 10~20% iron ions
Or ferrous ions soln mixing, 2~3h is impregnated, then carries out drying or naturally dry, you can obtain the iron-based modified mineral
Material.
The pH adjusting agent is any one or more in calcium oxide, calcium hydroxide, magnesium hydroxide, vulcanized sodium.
The pH adjusting agent is preferably calcium oxide and/or calcium hydroxide.
Provided by the present invention for administering in the formula of reparation medicament of heavy-metal contaminated soil, due to iron arsenite
Solubility is larger, and arsenous anion can be oxidized to arsenic acid radical ion, Fe-base compound and contaminated soil phase by the presence of oxidant
Unformed ferric arsenate (FeAsO is generated after interaction4·H2O) or scorodite (FeAsO42H is generated2) etc. O solubility are lower
Mineral are finally reached stable repairing effect to reduce the migration of As.As Fe/As molar ratios increase, ferric arsenate
Solubility reduce, the gradual reinforcement of stability.Similarly, the hydroxyl in Fe-base compound has preferable suction-operated to arsenic, especially
It is the arsenic of water-soluble state and ion-exchange state, it is suppressed that the migration of arsenic.It can not only promote arsenic acid in modified iron-based mineral material
Iron (FeAsO4·H2O) or the formation of scorodite is generated, and calcium, the magnesium plasma in mineral have the function of assisting into mine,
Promote arsenic to be adhering closely to mineral surfaces, further reduced the mobility of As；The addition that pH is adjusted is repaiied in progress soil remediation
When multiple, the metal ion in soil after handling can be stablized, ensure to leach pH between 6~9, to meet the row of GB8978-1996
Put standard.
The present invention also provides a kind of administering methods of heavy-metal contaminated soil, which is characterized in that includes the following steps：
(1) by heavy-metal contaminated soil and reparation medicament in mass ratio 20~50 described in claim 1:1 mixing, obtains
To mixed soil；
(2) water content of mixed soil is kept to be not less than 25%；
(3) moisturizing material is covered on the surface of mixed soil, conserved 1-3 days；
(4) it detects, if detection does not meet environmental requirement, the operation of step (1)~(3) is repeated, until testing result meets
Environmental requirement.
The moisturizing material is straw bag, gunnysack or other well known materials.
It is provided by the invention repair medicament carry out heavy-metal contaminated soil improvement when, can significantly reduce heavy metal from
The content of son, and administering method is easy to operate, regulation effect is preferable.
Description of the drawings
Fig. 1 is the process flow chart of the soil remediation of heavy metal pollution.
Specific implementation mode
The following describes the present invention in detail with reference to examples.
Embodiment 1
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：47.8% ferrous sulfate, 21.69% iron-based modified zeolite, 3.39% potassium permanganate, 27.12% calcium oxide, will be each
Raw material is milled into the material that granularity is 10-200 mesh respectively, mixes in proportion.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 3204mg/kg, lead content 297.3mg/kg, nickel content 745.8mg/kg, and cadmium content is
49mg/kg.The 1kg contaminated soils are taken, 3% above-mentioned reparation medicament is added, medicament and contaminated soil are mixed,
It keeps the water content of mixed soil to be not less than 25%, conserves 1-3 days after stirring, conserved 1-3 days after stirring, then by defined
The pollutant that national standard measures in leachate reaches《Integrated wastewater discharge standard》Level-one in (GB 8978-1996)
Discharge standard.It is 0.138mg/L by using arsenic leaching value after repairing chemical stabilization, nickel leaching value is 0.004mg/L, cadmium
Leaching value is 0.002mg/L, and lead leaching value is to reach the level-one row in integrated wastewater discharge standard less than 0.001mg/L
It puts.
Embodiment 2
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：40% ferrous sulfate, 10% ferric sulfate, 13% iron-based modified alta-mud, 2% potassium permanganate, 15% calcium oxide,
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by 20% magnesia respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 9300mg/kg, lead content 26.77mg/kg, nickel content 49.21mg/kg, and cadmium content is
16mg/kg.The 1kg contaminated soils are taken, 5% above-mentioned medicament is added, medicament and contaminated soil are mixed, are kept
The water content of mixed soil is not less than 25%, is conserved 1-3 days after stirring, then is measured in leachate by defined national standard
Pollutant reach《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using reparation
The leaching value of arsenic is 0.436mg/L after chemical stabilization, and nickel leaching value is 0.283mg/L, and lead leaching value is 0.028mg/L, cadmium
Leaching value is 0.029mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》In (GB 8978-1996)
First grade discharging.
Embodiment 3
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：40% ferrous sulfate, 10% ferric sulfate, 13% iron-based modified alta-mud, 2% potassium permanganate, 15% calcium oxide,
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by 15% magnesia, 5% vulcanized sodium respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 3227mg/kg, lead content 564mg/kg, nickel content 794mg/kg, and cadmium content is
0.2mg/kg.The 1kg contaminated soils are taken, 4% above-mentioned medicament is added, medicament and contaminated soil are mixed, are kept
The water content of mixed soil is not less than 25%, is conserved 1-3 days after stirring, then is measured in leachate by defined national standard
Pollutant reach《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using reparation
It is 0.23mg/L that the leaching value of arsenic, which is highest 0.16mg/L nickel leaching values, after chemical stabilization, and lead leaching value is 0.14mg/L,
Cadmium leaching value is 0.009mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》(GB 8978-1996)
In first grade discharging.
Embodiment 4
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：42% ferrous sulfate, 10% ferric sulfate, 23% iron-based modification infusorial earth, 2% potassium ferrate, 10% calcium oxide,
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by 10% magnesia, 3% vulcanized sodium respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 11300mg/kg, lead content 132mg/kg, nickel content 62mg/kg, and cadmium content is
4.7mg/kg.The 1kg contaminated soils are taken, 5% above-mentioned medicament is added, medicament and contaminated soil are mixed, are kept
The water content of mixed soil is not less than 25%, is conserved 1-3 days after stirring, then is measured in leachate by defined national standard
Pollutant reach《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using reparation
The leaching value of arsenic is 0.28mg/L after chemical stabilization, and nickel leaching value is 0.13mg/L, and lead leaching value is 0.14mg/L, cadmium leaching
It is 0.01mg/L to go out value.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》In (GB 8978-1996)
First grade discharging.
Embodiment 5
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：47% frerrous chloride, 22% calcium oxide, 9% magnesia, 3% potassium hyperchlorate, 4% vulcanized sodium, 15% iron-based are modified
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by zeolite respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 6340mg/kg, lead content 332mg/kg, nickel content 36mg/kg, cadmium content 5.6mg/
kg.The 1kg contaminated soils are taken, 5% above-mentioned medicament is added, medicament and contaminated soil are mixed, keep composite soil
The water content of earth is not less than 25%, is conserved 1-3 days after stirring, then measures the pollution in leachate by defined national standard
Object reaches《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using repairing, medicament is steady
It is 0.17mg/L that the leaching value of arsenic, which is 0.22mg/L nickel leaching values, after fixedization, and lead leaching value is 0.19mg/L, and cadmium leaching value is
0.05mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》Level-one row in (GB 8978-1996)
It puts.
Embodiment 6
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：56% ferrous sulfate, 24% calcium hydroxide, 5% potassium peroxydisulfate, 15% iron-based are attapulgite modified, by each raw material point
It is not milled into the material that granularity is 10-200 mesh, mixes in proportion.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 8326mg/kg, lead content 44mg/kg, nickel content 106mg/kg, cadmium content 9.4mg/
kg.The 1kg contaminated soils are taken, 5% above-mentioned medicament is added, medicament and contaminated soil are mixed, keep composite soil
The water content of earth is not less than 25%, is conserved 1-3 days after stirring, then measures the pollution in leachate by defined national standard
Object reaches《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using repairing, medicament is steady
It is 0.13mg/L that the leaching value of arsenic, which is 0.22mg/L nickel leaching values, after fixedization, and lead leaching value is 0.34mg/L, and cadmium leaching value is
0.017mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》Level-one row in (GB 8978-1996)
It puts.
Embodiment 7
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：40% ferrous sulfate, 10% ferric sulfate, 12% iron-based modified alta-mud, 3% potassium permanganate, 15% calcium oxide,
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by 20% magnesia respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 9560mg/kg, lead content 79mg/kg, nickel content 21mg/kg, cadmium content 3.1mg/
kg.The 1kg contaminated soils are taken, 4.5% above-mentioned medicament is added, medicament and contaminated soil are mixed, keep mixing
The water content of soil is not less than 25%, is conserved 1-3 days after stirring, then measures the dirt in leachate by defined national standard
Dye object reaches《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using reparation medicament
It is 0.27mg/L that the leaching value of arsenic, which is 0.35mg/L nickel leaching values, after stabilisation, and lead leaching value is 0.08mg/L, cadmium leaching value
For 0.008mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》Level-one in (GB 8978-1996)
Discharge.
Embodiment 8
A kind of reparation medicament for administering heavy-metal contaminated soil, the reparation medicament includes following weight percent
Raw material：35% ferrous sulfate, 13% iron-based modified alta-mud, 2% potassium permanganate, 15% calcium oxide, 30% magnesia, 5%
Each raw material is milled into the material that granularity is 10-200 mesh, mixed in proportion by vulcanized sodium respectively.
The soil of heavy metal pollution is administered using reparation medicament obtained above, takes a Jiangxi Province place huge sum of money
Belong to contaminated soil, uses《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) heavy metal specified in
Detection method measures the content of arsenic in pedotheque, and the contaminated soil is mainly based on arsenic pollution, and with lead, nickel, the dirt of cadmium
Dye, total Arsenic In Soil content are 4387mg/kg, lead content 332mg/kg, nickel content 162mg/kg, and cadmium content is
4.7mg/kg.The 1kg contaminated soils are taken, 3.5% above-mentioned medicament is added, medicament and contaminated soil are mixed, are protected
The water content for holding mixed soil is not less than 25%, is conserved 1-3 days after stirring, then measures leachate by defined national standard
In pollutant reach《Integrated wastewater discharge standard》First discharge standard in (GB 8978-1996).By using repairing
It is 0.13mg/L that the leaching value of arsenic, which is 0.28mg/L nickel leaching values, after multiple chemical stabilization, and lead leaching value is 0.14mg/L, cadmium
Leaching value is 0.01mg/L.Soil leaching value after reparation reaches《Integrated wastewater discharge standard》In (GB 8978-1996)
First grade discharging.
Comparative example 1
It is in place of this comparative example and the difference of embodiment 1：It repairs and is free of iron-based modified zeolite in the formula of medicament,
His component and preparation method are as described in Example 1.It is 0.338mg/L, nickel by using arsenic leaching value after repairing chemical stabilization
Leaching value is 0.004mg/L, and cadmium leaching value is 0.002mg/L, and lead leaching value is less than 0.001mg/L.
Comparative example 2
It is in place of this comparative example and the difference of embodiment 2：It repairs and is free of iron-based modified alta-mud in the formula of medicament,
Other components and preparation method are as described in Example 2.Leaching value by using arsenic after reparation chemical stabilization is 0.662mg/
L, nickel leaching value are 0.163mg/L, and lead leaching value is 0.061mg/L, and cadmium leaching value is 0.025mg/L.
Comparative example 3
It is in place of this comparative example and the difference of embodiment 4：It repairs and is free of iron-based modification infusorial earth in the formula of medicament,
Other components and preparation method are as described in Example 4.Leaching value by using arsenic after reparation chemical stabilization is 0.42mg/
L, nickel leaching value are 0.06mg/L, and lead leaching value is 0.11mg/L, and cadmium leaching value is 0.008mg/L.
Comparative example 4
It is in place of this comparative example and the difference of embodiment 4：It repairs and is free of calcium oxide and vulcanized sodium in the formula of medicament,
Other components and preparation method are as described in Example 4.Leaching value by using arsenic after reparation chemical stabilization is 0.21mg/
L, nickel leaching value are 0.43mg/L, and lead leaching value is 1.04mg/L, and cadmium leaching value is 0.09mg/L.
Comparative example 5
It is in place of this comparative example and the difference of embodiment 5：Repair medicament formula in without calcium oxide, magnesia and
Vulcanized sodium, the leaching value using arsenic after reparation chemical stabilization are 0.13mg/L, and nickel leaching value is 0.47mg/L, lead leaching value
For 3.24mg/L, cadmium leaching value is 0.08mg/L.
By comparative example 1, comparative example 2 and comparative example 3, compared respectively it is found that group with embodiment 1, embodiment 2 and embodiment 4
Iron-based modified zeolite, iron-based modified alta-mud and iron-based modification infusorial earth in point play the stabilisation of heavy metal ion
Certain effect.
By comparative example 4 and comparative example 5, calcium oxide, oxygen it is found that in component are compared with embodiment 4 and embodiment 5 respectively
Change magnesium and vulcanized sodium plays certain effect to the stabilisation of heavy metal ion.
It is above-mentioned to a kind of reparation medicament for administering heavy-metal contaminated soil and its to be administered heavy metal-polluted with reference to embodiment
The detailed description for contaminating the method progress of soil is illustrative without being restrictive, if can be enumerated according to limited range
A dry embodiment, therefore the change and modification in the case where not departing from present general inventive concept, should belong to protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of reparation medicament for administering heavy-metal contaminated soil, which is characterized in that the reparation medicament includes following heavy
Measure the raw material of percentage：
2. reparation medicament according to claim 1, which is characterized in that the oxidant is potassium ferrate, sodium hypochlorite, height
In potassium chlorate, potassium permanganate, ammonium persulfate any one or it is a variety of.
3. reparation medicament according to claim 1 or 2, which is characterized in that the Fe-base compound is ferric sulfate, chlorination
Any one or more in iron, ferric nitrate, frerrous chloride, ferrous sulfate.
4. reparation medicament according to claim 1, which is characterized in that the modified mineral materials are iron-based modified mineral material
Material.
5. reparation medicament according to claim 4, which is characterized in that in the iron-based modified mineral materials, mineral material
For any one or more of portland cement, active pozzolans, bentonite, diatomite, kaolin, attapulgite, zeolite.
6. reparation medicament according to claim 4 or 5, which is characterized in that the preparation side of the iron-based modified mineral materials
Method is：By mineral material with etc. quality 10~20% iron ions or ferrous ions soln mix, impregnate 2~3h, then carry out
Drying or naturally dry, you can obtain the iron-based modified mineral materials.
7. according to the reparation medicament described in claim 1-6 any one, which is characterized in that the pH adjusting agent be calcium oxide,
Any one or more in calcium hydroxide, magnesium hydroxide, vulcanized sodium.
8. reparation medicament according to claim 7, which is characterized in that the pH adjusting agent is calcium oxide and/or hydroxide
Calcium.
9. a kind of administering method of heavy-metal contaminated soil, which is characterized in that include the following steps：
(1) by heavy-metal contaminated soil and reparation medicament in mass ratio 20~50 described in claim 1:1 mixing, is mixed
Soil；
(2) water content of mixed soil is kept to be not less than 25%；
(3) moisturizing material is covered on the surface of mixed soil, conserved 1-3 days；
(4) it detects, if detection does not meet environmental requirement, the operation of step (1)~(3) is repeated, until testing result meets environmental protection
It is required that.
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| CN113337287A (en) * | 2021-08-05 | 2021-09-03 | 北京高能时代环境技术股份有限公司 | Composite reagent for treating chlorophenol-containing polluted soil and treatment method |
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