CN108480378A - It is a kind of eliminate soil heavy metal combined pollution method and application - Google Patents
It is a kind of eliminate soil heavy metal combined pollution method and application Download PDFInfo
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- CN108480378A CN108480378A CN201810125517.1A CN201810125517A CN108480378A CN 108480378 A CN108480378 A CN 108480378A CN 201810125517 A CN201810125517 A CN 201810125517A CN 108480378 A CN108480378 A CN 108480378A
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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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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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
It is a kind of eliminate soil heavy metal combined pollution method and application, the technology belong to field of environment protection.The technology is realized by following steps：Two ortho-hydroxyphenyl acetic acid sodium of ethylenediamine, 2 phosphonobutane, 1,2,4 tricarboxylic acids, polyepoxy sodium succinate, sodium metasilicate, poly (sodium aspartate) are added in distilled water; stirring, makes dissolving, appropriate to heat; make to be completely dissolved, add hydrochloric acid and Sodium Polyacrylate, stirs evenly; the mixture is added in the soil of pollution various heavy; various heavy in soil can be eluted and be removed, to eliminate the pollution of heavy metal-polluted soil, soil protection; underground water is protected, is ensured food safety.
Description
Technical field
The invention belongs to field of environment protection, more particularly to a kind of method for administering soil heavy metal combined pollution and answer
With.
Background technology
The heavy metal of nature is mainly distributed in air, water body and soil, and the heavy metal distribution in different systems is different,
Source is divided into natural source and artificial source.
Pass through the analysis and comparison to multiple provincial capital's major functions area surface dust heavy metal data, the results showed that,
Industrial area surface dust content of beary metal highest, commuter zone surface dust content of beary metal is minimum, shopping centre and resident cultural district
Surface dust content of beary metal is in medium level.The different larger element of surface dust heavy metal level point between 4 kinds of functional areas
It is Zn and Pb, the content difference of Cu and Cd in different function area surface dust is smaller.
Industrial area surface dust heavy metal largely derives from industrial production associated therewith.Such as steel production, vapour
Vehicle manufacture is smelted and is machined, plating.Commuter zone surface dust mainly by traffic activity influenced include locomotive brake block,
The abrasion of tire and other parts, the discharge of tail gas and dust on the roads are raised and are deposited repeatedly.Shopping centre surface dust comes
Source is relatively various and complicated, not only derives from soil, air bells laid, but also part was influenced by traffic activity, and also and skin
Weathering, the falling off of urban facilities surface paint chipping, the carrying of dust caused by the abrasion of commodity and the aggregation of crowd
It is related with migration.Resident cultural district is similar to shopping centre surface dust sources of heavy metal part, but in the unique source room having
The input of dust.
In April, 2005 in December, 2013, Environmental Protection Department can carry out national soil pollution for the first time with Ministry of Land and Resources
Status investigation is announced《National Soil Pollution Investigation bulletin》.Investigation result shows that national soil environment situation is not allowed totally
Optimism, some areas soil pollution is heavier, and arable soil environmental quality causes anxiety, industry and mining discarded ground soil environment outstanding problem.
Pollution situation：The total point exceeding standard rate of national soil is 16.1%, wherein slightly, slightly, moderate and serious pollution
Point ratio is respectively 11.2%, 2.3%, 1.5% and 1.1%.
In terms of land use pattern, arable land, forest land, grassland soil point exceeding standard rate be respectively 19.4%, 10.0%,
10.4%.In terms of pollution type, based on inorganic type, organic type takes second place, and compound pollution proportion is smaller, and inorganic pollution is exceeded
Point digit accounts for the 82.8% of all exceeded points.
In terms of the exceeded situation of pollutant, 8 kinds of cadmium, mercury, arsenic, copper, lead, chromium, zinc, nickel inorganic pollution point exceeding standard rate difference
It is 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, 4.8%；Six six six, DDT, 3 class of polycyclic aromatic hydrocarbon
Organic pollution point exceeding standard rate is respectively 0.5%, 1.9%, 1.4%.
In terms of pollution distribution situation, soils in south china pollution overweights the north；Yangtze River Delta, the Delta of the Pearl River, the old work in northeast
The subregions such as industry base soil contamination problem is more prominent, and southwest, variable charge soil heavy metals exceeding standard range are larger；Cadmium,
The situation gradually risen from northwest to the southeast, from northeast to southwestward is presented in 4 kinds of mercury, arsenic, lead level of inorganic contaminants distributions.
Heavy metal pollution of soil in addition to having outside the Pass with human activities such as industrial production, rural activities, also with matrix weathering
Cheng Youguan.Therefore, Heavy Metal Pollution In Cultivated Land source can be divided into external source pollution and endogenous pollution two major classes.Wherein atmospheric sedimentation
It is the main external source import factor of heavy metal-polluted soil.In addition sewage irrigation and chemical fertilizer application are its of Heavy Metal Pollution In Cultivated Land
His external source pollution source.
There are metal mine exploitation smelting, chemical industry production, heavy metal pesticide, sewage irrigation in heavy metal pollution of soil source
With chemical fertilizer application and high geology background value etc., wherein Non Ferrous Mineral Industry picks up and smelts the exhaust gas containing heavy metal discharged and sinks
The solid wastes corrosions such as drop, waste water irrigation and waste residue diffuse into the main path that soil etc. is heavy metal pollution.
As a whole, the detection device for multi metallic elements combined pollution based on cadmium-copper, arsenic-cadmium-lead etc., represents China
Main heavy metal pollution of soil type.Mainly there are two aspects in the source of heavy metal-polluted soil, and one is derived from soil parent material, different
Matrix, soil-forming process be formed by soil, content of beary metal difference is apparent.Two are derived from mankind's activity：Industrial and mining area with
Solid waste, industry (three wastes) discharge and the air and acid rain depositions of factory floor, long-term dirty filling, traffic pollution, automotive wheels
Tire is worn and the tail gas of discharge, organic fertilizer！A large amount of applications of chemical fertilizer and pesticide.By the comparison with background value, the enrichment of Cd is most
To be serious, followed by Pb, exceeded phenomenon is in national generally existing.On the whole, Southwest China heavy metal-polluted soil is enriched with
Value is higher, followed by Guangdong and Guangxi Provinces and Liaoning Area.Heavy metal contained by soil can enter water body through a variety of ways, can also be with
Airborne dust is that carrier is propagated in the world.
Chinese city heavy metal content in soil has been more than that soil background, especially Cd and Pb are seriously polluted.Chinese city
There are apparent regional disparity, the urban soil content of beary metal differences of east, middle part and west area for the content of heavy metal-polluted soil
Larger, the pollution level of provincial capital and prefecture-level city differs, and there is also significant differences between the different function area of city.
2016, national environmental protection portion approved《Soil Pollution Control action plan》,《Soil Pollution Control row
Dynamic plan》It is a huge engineering of scale of investment, also will will be a long-term engineering, will just have step, and gradually implement stage by stage.
With implementing for 6 soil protections and the emphasis demonstration area project of pollution control, the acceleration of China's soil pollution reparation will be promoted
Development.It should say soil remediation wide market, although future market space is huge, due to soil remediation correlation skill
The many difficulties that the soil remediations such as the shortage of art standard and basic data are implemented, interior in recent years, China's Soil Pollution Control also needs
It first passes through pilot demonstration and part is carried out, then realize the process of scale development.Basic data and repair experience accumulation with
And the deposit of recovery technique by be China's current stage soil remediation vital task.
The Treatment process of soil mainly has physics Treatment process, chemical harnessing technology, microbial treatment technology, plant in treating
Technology etc. is several.Soil antibiotic and pollution by pesticides technology is common has：Phytoremediation, microorganism remediation, rhizosphere microorganism joint
It repairs, physical chemistry reparation, chemical remediation etc..
These methods respectively have advantage and disadvantage, are mostly used in water pollution control, and the remediation contaminated soil for large area is also not
It is more, because cost is too high, there is secondary pollution, while being clearly not thorough.
This technology synthesis administers the heavy metal in soil using single heavy metal-polluted soil passivation, curing, still
Active Heavy Metals are converted the words nonabsorbable form of plant by solidification and passivation only temporary makeshift, but with when
Between, the change of weather and geological conditions and soil physical and chemical property variation, the heavy metal of solidification or passivation can release, become
Viability ion；It is single that heavy metal in soil pollution can be handled using chelating agent, but efficiency is low, the time is long, uses
The composite highly effective heavy metal-polluted soil eluent treatment effeciency of this law production is high, and environment friendly is high, easy to operate, easy to implement big
Technical scale application.
Invention content
The technical issues of solution：The present invention is for heavy metal pollution of soil, especially Metallurgical Factory, metal stope and chemical industry
Factory's contaminated sites invent a kind of high-efficiency metal eluent, within a short period of time soil Fl heavy metal portion big absolutely
Divide and chelate and dissolve, through pure water elution, to remove harm of the heavy metal-polluted soil to environment and the mankind.
Technical solution：It is a kind of eliminate soil heavy metal combined pollution method and application, step be：A. in 50 liters of distilled water
The middle two ortho-hydroxyphenyl acetic acid sodium (EDDHA-Na) of ethylenediamine for being added 1000-20000 grams, 500-1500 grams of phosphonobutane -1 2-,
2,4- tricarboxylic acids (PBTCA), 500-250 grams of 0 polyepoxy sodium succinate (PESA), slowly dissolve by heating, slowly stir, wait for whole
500-3500 grams of sodium metasilicate, 500-1000 grams of poly (sodium aspartate) are added after dissolving, slowly stirs, it is cooling after most of dissolving
Afterwards, 200-1000 milliliters of concentrated hydrochloric acids are added, stir evenly.B. by above-mentioned a, treated that 2000-4000 milliliters of product is added to
In earth pillar equipped with 50 kilograms of soil, the heavy metal in earth pillar is eluted, before above-mentioned mixing leacheate is added, is first added in earth pillar
Enter 8000-20000 milliliters of distilled water, is sufficiently humidified so as to earth pillar.C. it is slowly added to 2000- in batches in earth pillar after above-mentioned b processing
The mixing leacheate that 4000 milliliters of above-mentioned a are eventually fabricated places collector collection earth pillar leacheate, the leaching of outflow below earth pillar
Washing lotion continuously adds in earth pillar, while starting the stirring rod in earth pillar, continuously stirs in earth pillar soil 5-12 minutes, continues to elute
Heavy metal in earth pillar 5-12 times repeatedly, is then added 5000-20000 milliliters of distilled water in earth pillar upper end again and continues to elute,
It is 5-12 times continuous；Leacheate is adjusted from the lower end rate of outflow, is controlled in 10-50 ml/mins.
A kind of any elimination heavy metal pollution of soil technology and its life area, refuse landfill, municipal sludge,
Gas station, paper mill, stope, petrochemical plant, oil plant, electroplate factory, electrolysis plant, metallurgical works, Fine Chemical Works, farmland,
Contaminated sites and farm's application that nearby the related place polluted heavy metals dye such as soil is repaired.
Advantageous effect：The present invention can eliminate Compound Heavy Metals object in soil to greatest extent, eliminate to greatest extent
Heavy metal pollution of soil and its destruction to environment and the harm to the mankind, are conducive to Ecological Sustainable Development.
The present invention is compared with prior art：
1) the heavy metal pollution of soil removal leacheate researched and developed in the present invention, production method is easy, it is technically simple it is easy, can
It is strong operability, of low cost, highly practical；
2) the high-efficiency multi-function removal heavy metal pollution of soil technology that the present invention uses, can remove in soil to the maximum extent
The heavy metal of pollution reduces the residual of the harmful substance after soil treatment, with currently used single solidification hair/deactivation method or
The single chemical leaching liquid phase ratio of person, removal efficiency is high, and speed is fast, and residue and secondary pollution are seldom, and residue is mostly
Organic substance simple in structure is easy by environment and Soil Microorganism degradation removal, is environmentally friendly heavy metal eluant, eluent.
Description of the drawings
Fig. 1 is using this technology processing heavy metal-polluted soil process comparison.
Specific implementation mode
Below in conjunction with example, the invention will be further described：
Embodiment 1：
1. 1000-20000 grams of two ortho-hydroxyphenyl acetic acid sodium of ethylenediamine, 500 grams of 2- phosphonic acids are added in 50 liters of distilled water
Butane -1,2,4- tricarboxylic acids, 500 grams of polyepoxy sodium succinates are slowly dissolved by heating, are slowly stirred, and are added after all dissolving
500 grams of sodium metasilicate, 500 grams of poly (sodium aspartate)s, are slowly stirred, and after most of dissolving, after cooling, 200 milliliters of concentrated hydrochloric acids are added,
It stirs evenly.
2. by above-mentioned 1, treated that 2000 milliliters of product is added in the earth pillar equipped with 50 kilograms of soil, elutes in earth pillar
Heavy metal 8000 milliliters of distilled water are first added in earth pillar, are sufficiently humidified so as to earth pillar before above-mentioned mixing leacheate is added.
3. it is slowly added to the 2000 milliliters above-mentioned 1 mixing leacheates being eventually fabricated in batches in earth pillar after above-mentioned 2 processing,
Collector is placed below earth pillar and collects earth pillar leacheate, and the leacheate of outflow continuously adds in earth pillar, while starting in earth pillar
Stirring rod continuously stirs soil 5 minutes in earth pillar, continue elute earth pillar in heavy metal, 5 times repeatedly, then again on earth pillar
End is added 5000 milliliters of distilled water and continues to elute, continuous 5 times；Leacheate is adjusted from the lower end rate of outflow, control 10 milliliters/
Minute.Whole water-soluble state heavy metals, most exchange states and ADSORPTION STATE heavy metal, an iron and manganese oxides package huge sum of money in soil
Belong to, carbonate combine state heavy metal and organically combine state heavy metal are removed.
Embodiment 2：
1. 10000 grams of two ortho-hydroxyphenyl acetic acid sodium of ethylenediamine, 800 grams of 2- phosphonobutanes-are added in 50 liters of distilled water
1,2,4- tricarboxylic acids, 1500 grams of polyepoxy sodium succinates, slowly dissolves by heating, slowly stirs, and 1500 are added after all dissolving
Gram sodium metasilicate, 800 grams of poly (sodium aspartate)s, are slowly stirred, and after most of dissolving, after cooling, 500 milliliters of concentrated hydrochloric acids are added, stir
It mixes uniformly.
2. by above-mentioned 1, treated that 3000 milliliters of product is added in the earth pillar equipped with 50 kilograms of soil, elutes in earth pillar
Heavy metal 10000 milliliters of distilled water are first added in earth pillar, are sufficiently humidified so as to earth pillar before above-mentioned mixing leacheate is added.
3. it is slowly added to the 3000 milliliters above-mentioned 1 mixing leacheates being eventually fabricated in batches in earth pillar after above-mentioned 2 processing,
Collector is placed below earth pillar and collects earth pillar leacheate, and the leacheate of outflow continuously adds in earth pillar, while starting in earth pillar
Stirring rod continuously stirs soil 8 minutes in earth pillar, continue elute earth pillar in heavy metal, 8 times repeatedly, then again on earth pillar
End is added 10000 milliliters of distilled water and continues to elute, continuous 8 times；Leacheate is adjusted from the lower end rate of outflow, control 20 milliliters/
Minute.Whole water-soluble state heavy metals, most exchange states and ADSORPTION STATE heavy metal, an iron and manganese oxides package huge sum of money in soil
Belong to, carbonate combine state heavy metal and organically combine state heavy metal are removed.
Embodiment 3
1. 20000 grams of two ortho-hydroxyphenyl acetic acid sodium of ethylenediamine, 1500 grams of 2- phosphonobutanes-are added in 50 liters of distilled water
1,2,4- tricarboxylic acids, 2500 grams of polyepoxy sodium succinates, slowly dissolves by heating, slowly stirs, and 3500 are added after all dissolving
Gram sodium metasilicate, 1000 grams of poly (sodium aspartate)s, are slowly stirred, and after most of dissolving, after cooling, 1000 milliliters of concentrated hydrochloric acids are added,
It stirs evenly.
2. by above-mentioned 1, treated that 4000 milliliters of product is added in the earth pillar equipped with 50 kilograms of soil, elutes in earth pillar
Heavy metal 20000 milliliters of distilled water are first added in earth pillar, are sufficiently humidified so as to earth pillar before above-mentioned mixing leacheate is added.
3. it is slowly added to the 4000 milliliters above-mentioned 1 mixing leacheates being eventually fabricated in batches in earth pillar after above-mentioned 2 processing,
Collector is placed below earth pillar and collects earth pillar leacheate, and the leacheate of outflow continuously adds in earth pillar, while starting in earth pillar
Stirring rod continuously stirs soil 12 minutes in earth pillar, continue elute earth pillar in heavy metal, 12 times repeatedly, then again in earth pillar
Upper end is added 20000 milliliters of distilled water and continues to elute, continuous 10 times；Leacheate is adjusted from the lower end rate of outflow, control is in 50 millis
Liter/min.Whole water-soluble state heavy metals, most exchange states and ADSORPTION STATE heavy metal, iron and manganese oxides package weight in soil
Metal, carbonate combine state heavy metal and organically combine state heavy metal are removed.
The application example of the present invention：
The technology of the present invention is used to pollute the application of various heavy soil remediation.
1, it with reference to embodiment 1, is handled containing heavy metal Cd, Pb, Cr and Hg contaminated soil using this technology, by processing
Afterwards, Cd is remained with the control soil of this technology not being used to compare, in soil reduces 93%, Pb reduction 85%, Cr reductions
93%, Hg reduce 75%, (Fig. 1)；
2, it is handled using this technology and is polluted containing heavy metal Cd, Pb, Cr and Hg with reference to embodiment 1 with reference to embodiment 2
Soil remains Cd with the control soil of this technology not being used to compare, in soil and reduces 96%, Pb reductions after treatment
92%, Cr reduce by 97%, Hg and reduce 83%,；
3, it is handled using this technology and is polluted containing heavy metal Cd, Pb, Cr and Hg with reference to embodiment 1 with reference to embodiment 3
Soil remains Cd with the control soil of this technology not being used to compare, in soil and reduces 96%, Pb reductions after treatment
94%, Cr reduce by 99%, Hg and reduce 95%.
Claims (5)
1. a kind of method for eliminating soil heavy metal combined pollution and application, it is characterised in that step is：
A. 1000-20000 grams of two ortho-hydroxyphenyl acetic acid sodium (EDDHA-Na) of ethylenediamine, 500- are added in 50 liters of distilled water
1500 grams of 2- phosphonobutanes -1,2,4- tricarboxylic acids (PBTCA), 500-2500 grams of polyepoxy sodium succinate (PESA) are slowly heated
Dissolving, is slowly stirred, and 500-3500 grams of sodium metasilicate, 500-1000 grams of poly (sodium aspartate) are added after all dissolving, slowly stirs
It mixes, after most of dissolving, after cooling, 200-1000 milliliters of concentrated hydrochloric acids is added, stir evenly.
B. by above-mentioned a, treated that 2000-4000 milliliters of product is added in the earth pillar equipped with 50 kilograms of soil, elutes in earth pillar
Heavy metal 8000-20000 milliliters of distilled water are first added in earth pillar, are sufficiently humidified so as to soil before above-mentioned mixing leacheate is added
Column.
C. it is slowly added to the mixing leacheate that 2000-4000 milliliters of above-mentioned a are eventually fabricated in earth pillar in batches after above-mentioned b processing,
Collector is placed below earth pillar and collects earth pillar leacheate, and the leacheate of outflow continuously adds in earth pillar, while starting in earth pillar
Stirring rod, continuously stir in earth pillar soil 5-12 minutes, continue elute earth pillar in heavy metal, 5-12 times repeatedly, then again
5000-20000 milliliters of distilled water are added in earth pillar upper end to continue to elute, it is 5-1 times continuous；It adjusts leacheate and flows out speed from lower end
Degree is controlled in 10-50 ml/mins.
2. a kind of method for eliminating soil heavy metal combined pollution and application according to claim 1, it is characterised in that described
Method is the two ortho-hydroxyphenyl acetic acid sodium (EDDHA-Na) of ethylenediamine that 1000-20000 grams is added in 50 liters of distilled water, 500-
1500 grams of 2- phosphonobutanes -1,2,4- tricarboxylic acids (PBTCA), 500-2500 grams of polyepoxy sodium succinate (PESA) are slowly heated
Dissolving, is slowly stirred, and 500-3500 grams of sodium metasilicate, 500-100 grams of 0 poly (sodium aspartate) are added after all dissolving, slowly stirs
It mixes, after most of dissolving, after cooling, 200-1000 milliliters of concentrated hydrochloric acids is added, stir evenly.
3. a kind of method for eliminating soil heavy metal combined pollution and application according to claim 1, it is characterised in that described
In method, by above-mentioned a, treated that 2000-4000 milliliters of product is added in the earth pillar equipped with 50 kilograms of soil, elutes earth pillar
In heavy metal 8000-20000 milliliters of distilled water are first added in earth pillar, are sufficiently humidified so as to before above-mentioned mixing leacheate is added
Earth pillar.
4. a kind of method for eliminating soil heavy metal combined pollution and application according to claim 1, it is characterised in that described
Method is slowly added to the mixing leacheate that 2000-4000 milliliters of above-mentioned a are eventually fabricated in earth pillar in batches after above-mentioned b processing,
Collector is placed below earth pillar and collects earth pillar leacheate, and the leacheate of outflow continuously adds in earth pillar, while starting in earth pillar
Stirring rod continuously stirs in earth pillar soil 5-12 minutes, continues to elute the heavy metal in earth pillar, 5-12 times repeatedly, then exist again
Earth pillar upper end is added 5000-20000 milliliters of distilled water and continues to elute, 5-12 times continuous；Leacheate is adjusted from the lower end rate of outflow,
Control is in 10-50 ml/mins.
5. any a kind of elimination heavy metal pollution of soil technology of Claims 1 to 4 and its in life area, garbage loading embeading
Field, municipal sludge, gas station, paper mill, stope, petrochemical plant, oil plant, electroplate factory, it is electrolysis plant, metallurgical works, fine
The application that nearby the related place polluted heavy metals dye such as soil is repaired of chemical plant, farmland, contaminated sites and farm.
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| CN201810125517.1A CN108480378A (en) | 2018-02-02 | 2018-02-02 | It is a kind of eliminate soil heavy metal combined pollution method and application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521950A (en) * | 2019-09-17 | 2021-03-19 | 中国石油化工股份有限公司 | Soil washing composition containing phosphono carboxylic acid, application thereof and method for repairing heavy metal soil |
| CN112792114A (en) * | 2020-12-28 | 2021-05-14 | 四川蓝本数字建造科技有限公司 | Method for removing heavy metal pollutants in soil by using PBTCA and application |
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| CN103894395A (en) * | 2014-03-24 | 2014-07-02 | 华南理工大学 | Two-level remediation method of heavy metal contaminated soil |
| CN104174639A (en) * | 2014-07-28 | 2014-12-03 | 中国科学院南京土壤研究所 | Chemical elution-plant combined remediation method of polybrominated diphenyl ether and heavy metal compound contaminated soil |
| CN106085440A (en) * | 2016-05-31 | 2016-11-09 | 汪立刚 | A kind of heavy-metal contaminated soil is combined eluent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102225425A (en) * | 2011-04-29 | 2011-10-26 | 沈阳大学 | Leaching method for remedying heavy metal-polluted soil |
| CN103894395A (en) * | 2014-03-24 | 2014-07-02 | 华南理工大学 | Two-level remediation method of heavy metal contaminated soil |
| CN104174639A (en) * | 2014-07-28 | 2014-12-03 | 中国科学院南京土壤研究所 | Chemical elution-plant combined remediation method of polybrominated diphenyl ether and heavy metal compound contaminated soil |
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| CN112521950A (en) * | 2019-09-17 | 2021-03-19 | 中国石油化工股份有限公司 | Soil washing composition containing phosphono carboxylic acid, application thereof and method for repairing heavy metal soil |
| CN112792114A (en) * | 2020-12-28 | 2021-05-14 | 四川蓝本数字建造科技有限公司 | Method for removing heavy metal pollutants in soil by using PBTCA and application |
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Application publication date: 20180904 |