CN106833653A - A kind of fast repairing method of heavy metal pollution - Google Patents
A kind of fast repairing method of heavy metal pollution Download PDFInfo
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- CN106833653A CN106833653A CN201710059351.3A CN201710059351A CN106833653A CN 106833653 A CN106833653 A CN 106833653A CN 201710059351 A CN201710059351 A CN 201710059351A CN 106833653 A CN106833653 A CN 106833653A
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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
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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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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Abstract
The invention discloses a kind of fast repairing method of heavy metal pollution, belong to heavy metal pollution of soil Treatment process field, include the raw material of following weight portion：Ethylenediamine tetra-acetic acid 30~40, tartaric acid 10~20, malic acid 3~10, citric acid 10~20, glutamic acid N, N oxalic acid 8~15, EDDS 3~10, sulfamic acid 2~10, consumption amounts to 10~20kg, the surfactant of 3~7 weight portions is added, then with 1:3000~20000 ratio mixes with water, heavy metal Polluted area is poured or sprayed, to promote the conversion of carbonate combine state in soil, organic matter combination state, ferrimanganic aluminum oxide combination state, residual form to available state, improve absorption, enrichment and the volatilization of plant heavy metal, so that more heavy metal ion in taking away soil in a short time, are a kind of a kind of methods for quickly, thoroughly solving heavy metal pollution.
Description
Technical field
The present invention relates to a kind of restorative procedure of heavy metal pollution, the quick reparation side of more particularly to a kind of heavy metal pollution
Method, belongs to heavy metal pollution of soil Treatment process field.
Background technology
With the acceleration of process of industrialization, the demand of all types of industries enterprise heavy metal is growing day by day, at the same time, by giving birth to
The heavy metal discarded object for producing and producing also gradually increases, the particularly improper exploitation and smelting of mineral resources, and three industrial wastes are not
Qualified discharge and the shortage of environmental consciousness, cause substantial amounts of heavy metal ion polluted surface water and underground water, eventually enter into soil
In environment so that heavy metal in soil pollution becoming serious, the ecological safety of mining area and surrounding area is have impact on, near
Resident health and living environment constitute a serious threat, cause cadmium, chromium, arsenic, lead in the foods such as many ground grains, veterinary antibiotics
It is exceeded or close to critical value Deng content of beary metal.And then the life and health of the mankind is endangered by food chain.Therefore, soil pollution has been
One of great environmental problem as global concern, the repairing and treating of heavy-metal contaminated soil has become environmental science and ecology
The focus of research is learned, causes concern both at home and abroad.
Due to heavy metal pollution toxicity, the complexity of biological effect and its stability in soil, heavy metal pollution
Reparation problem is always current difficult point.Among current remediation of heavy metal-contaminated soil, heavy metal pollution of soil, vitrification, electricity
The methods such as dynamic reparation, chemical leaching recovery technique all can be the means for thoroughly solving heavy metal pollution, but due to technology
The limitation of condition, it is difficult to large-scale to implement to administer；And quantities is big, high cost, only effective to the pollution of local land used, nothing
Method solves the problems, such as the Farmland contamination of large area；Chemistry and the maximum problem of biological passivation are no matter what to add, heavy metal
It is still present in soil, simply limits its activity, it is not removed.
In the means repaired in the original location, phytoremediation is a comparatively safe effective manner, is planted by using super enrichment
Organic pollution in thing removal soil in metal or soil, reduces content and bio-available Zn concentration of the heavy metal in soil, from
And reduce the harmfulness of heavy metal, it is current most study and most promising method.
From after eighties of last century the seventies, especially the eighties, external to begin to by this biological method, right
The soil of mine pollution, heavy metal pollution and Organic Pollution is repaired, and has many successful stories.Heavy metal-polluted soil is dirty
Dye is repaired used plant and is super enriching plant, and energy excess absorbs heavy metal and migrated to the plant of root and overground part
Thing position, the especially heavy metal ion of tolerance high content, adaptability are especially strong.Phytoremediation technology has rehabilitation cost low, suitable
Ying Xingguang, tolerance is strong, the advantages of do not destroy soil physico-chemical property；But because heavy metal is in soil, deposited with variform
It is that plant can only absorb the heavy metal of the ionic state and complex state that are dissolved in water in environment, therefore, most heavy metal ion
Can not be absorbed by plant, this has great difficulty for the pollution of quick rehabilitating soil, and general super enriching plant is repaiied
Multiple intermediate pollution cadmium, arsenic pollution farmland at least need more than 10 years, even up to decades supreme a century；Heavy metal is slightly dirty
Dye soil, is typically difficult to use phytoremediation.Phytoremediation is relatively adapted to heavy-metal contaminated soil high, but with the reparation time limit
Increase, remediation efficiency can also be gradually reduced, and influence repairing and treating effect, increase control expense.
Therefore it provides a kind of carbonate combine state that can be effectively facilitated in soil, organic matter combination state, ferrimanganic aluminum oxide
With reference to state, residual form to the conversion of available state, absorption, enrichment and the volatilization of plant heavy metal are improved, so as in short-term
It is interior to take away more heavy metal ion in soil, so that the quick heavy-metal contaminated soil for thoroughly solving heavy metal pollution
The activator of quick reparation and the method for quick restoration of soil polluted by heavy metal just turn into the skill that the technical field is badly in need of solving
Art problem.
The content of the invention
An object of the present invention is to provide a kind of carbonate combine state that can be effectively facilitated in soil, organic matter and combines
State, ferrimanganic aluminum oxide combination state, residual form improve absorption, enrichment and the volatilization of plant heavy metal to the conversion of available state
Effect, so that more heavy metal ion in taking away soil in a short time, so that quick thoroughly solve heavy metal pollution
The activator of the quick reparation of heavy-metal contaminated soil.
Above-mentioned purpose of the invention reaches by the following technical programs：
A kind of quick reparation activator of heavy-metal contaminated soil, its composition is as follows：Ethylenediamine tetra-acetic acid, tartaric acid,
Malic acid, citric acid, glutamic acid N, two or more arbitrary proportions in N- oxalic acid, EDDS or sulfamic acid
Mixing.
Preferably, the activator also surfactant including 3~7 weight %.
Preferably, its composition and proportioning are as follows：
Ethylenediamine tetra-acetic acid：Tartaric acid：Malic acid：Citric acid：Glutamic acid N, N- oxalic acid：EDDS：Ammonia
Base sulfonic acid, its weight portion is 30~40：10~20：3~10：10~20：8~15：3~10：2~10.
Preferably, the activator also surfactant including 3~7 weight portions.
Preferably, its composition and proportioning are as follows：
Ethylenediamine tetra-acetic acid：Tartaric acid：Malic acid：Citric acid：Glutamic acid N, N- oxalic acid：EDDS：Ammonia
Base sulfonic acid, its percentage by weight is 30~40%：10~20%：3~10%：10~20%：8~15%：3~10%：2~
10%.
Preferably, the activator also surfactant including 3~7 weight %.
Preferably, the surfactant is one or two in agriculture breast 1602 or Tween 80.
Combined it is a further object of the present invention to provide a kind of carbonate combine state that can be effectively facilitated in soil, organic matter
State, ferrimanganic aluminum oxide combination state, residual form improve absorption, enrichment and the volatilization of plant heavy metal to the conversion of available state
Effect, so that more heavy metal ion in taking away soil in a short time, so that quick thoroughly solve heavy metal pollution
The fast repairing method of heavy-metal contaminated soil.
Above-mentioned purpose of the invention reaches by the following technical programs：
A kind of fast repairing method of heavy-metal contaminated soil, its step is as follows：
(1) composite organic acid is mixed, is then watered, irrigate or spray by way of, in applying rehabilitating soil；
(2) in the soil after having used activator, super enriching plant is planted, the heavy metal ion to free state is carried out
Enrichment and absorption；
(3) in the whole growth cycle of enriching plant, it is watered using the composite organic acid in step (1), by irrigating
Or the mode of spray, in applying rehabilitating soil.
Preferably, the formula of composite organic acid is described in the step (1)：Ethylenediamine tetra-acetic acid, tartaric acid, apple
Acid, citric acid, glutamic acid N, two or more arbitrary proportions in N- oxalic acid, EDDS or sulfamic acid it is mixed
Close.
Preferably, the formula of composite organic acid is described in the step (1)：Ethylenediamine tetra-acetic acid, tartaric acid, apple
Acid, citric acid, glutamic acid N, N- oxalic acid, EDDS and sulfamic acid, its weight portion are 30~40：10~20：3
~10：10~20：8~15：3~10：2~10.
Preferably, the surfactant of 3~7 weight portions is added described in the step (1) in composite organic acid, is made sharp
Agent living.
Preferably, the formula of composite organic acid is described in the step (1)：Ethylenediamine tetra-acetic acid, tartaric acid, apple
Acid, citric acid, glutamic acid N, N- oxalic acid, EDDS and sulfamic acid, its percentage by weight are 30~40%：10
~20%：3~10%：10~20%：8~15%：3~10%：2~10%.
Preferably, the surfactant of 3~7 weight % is added described in the step (1) in composite organic acid, is made sharp
Agent living.
Preferably, surfactant described in the step (1) is one or two in agriculture breast 1602 or Tween 80；
Preferably, the ratio being watered described in the step (1) and step (3) is：Composite organic acid：Water ≈ 1:3000~
20000。
Preferably, super enriching plant is described in the step (2)：Sedum alfredii Hance, black nightshade, chenopodium ambrosiodies or nettle.
Preferably, the addition of composite organic acid described in the step (3) is divided into 2~3 times, respectively early stage, mid-term and
Later stage.
Preferably, the mu consumption of composite organic acid or activator described in the step (1) and step (3) for 10~
20kg/ times.
Of the invention being compared with conventional method has the advantage that
1st, the fast repairing method of heavy-metal contaminated soil of the invention can activate most of fixations or passive state
Heavy metal ion, makes its separate out；
2nd, shorten the time limit that phytoremediation is normally repaired, shorten reparation process；
3 and the repairing and treating of heavy metal pollution in the past, it is a kind of opposite effect mode, it is unnecessary in soil thoroughly to take away
Heavy metal.
The fast repairing method of heavy metal pollution of the invention is converted into effectively by the heavy metal ion in the soil that dissociates
The mode of state, in promoting pollutant in soil dissolving or move to soil layer water environment using organic acid, using super enriching plant
Root system draws heavy metal from soil, and is shifted, be stored to the aerial part of plant, then gathers in aerial part, continuously
Heavy metal in soil can be dropped to acceptable level by plantation hyperaccumulative plant.
Below by specific embodiment, the present invention is described in detail.It should be understood that described embodiment is only
It is related to the preferred embodiments of the invention, in the case of the spirit and scope of the present invention are not departed from, the change of various composition and content
It is all possible to change and improve.
Specific embodiment
Embodiment 1
The activation invalid state of heavy metal-polluted soil is converted into the available state that enriching plant is absorbed, and can refer to list below and is swashed
The preparation of agent living, wherein, the proportioning of composite organic acid is as shown in table 1 below：
Table 1
Embodiment 2
Guangdong heavy metal-polluted soil serious pollution area, place by sewage irrigation for many years, heavy metal in soil concentration over-standard,
Wherein topmost pollutant is Cd2+、Pb2+、Cu2+、Zn2+、The heavy metal ion such as As, gather soil sample, with the formula 1- in table 1
4 pairs of soil of formula are processed：The Compound-acid that 1- formulas 4 are formulated in table 1 is mixed and made into activator, 1 is then watered:10000,
By way of irrigating or spraying, apply in rehabilitating soil, compare the quantity of this several metal ion species available state.
Wherein, the measure of soil available cadmium, Pb, Cu, Zn, takes 5.0g and crosses in the soil of 20 mesh and 150ml conical flasks, plus
Enter the 0.005mol/L DTPA-0.1mol/L TEA-0.01mol/L CaCl of 25ml2, it is placed in level concussion shaking table 2h, rotating speed
It is 180r/min, stands filtering, Cd, Pb content is determined using flame atomic absorption spectrophotometer in filtrate.
Soil available As is determined：Take in soil and 150ml conical flasks that 5.0g crosses 20 mesh, add the 0.5mol/L of 50ml
NaHCO3, level concussion shaking table 2h is placed in, rotating speed is 180r/min, stands filtering, and As contents are using atomic fluorescence point in filtrate
Light photometric determination.
The quantity of heavy metal available state compares (mg.kg after the before processing of table 2-1)
| As | |||||
| Control | 2.79 | 203.57 | 1.41 | 2001.25 | 247.25 |
| Formula 1 | 3.35 | 423.26 | 2.34 | 3231.31 | 307.44 |
| Formula 2 | 4.43 | 506.73 | 2.21 | 4327.89 | 406.21 |
| Formula 3 | 3.78 | 601.22 | 1.87 | 3987.25 | 501.21 |
| Formula 4 | 5.11 | 479.25 | 3.04 | 4900.28 | 478.22 |
This explanation, by after organic acid treatment, the quantity of heavy metal available state substantially increases, increased super enriching plant suction
The chance of receipts, largely improves the efficiency of plants enriched absorption, shortens the time limit needed for phytoremediation.
Embodiment 3
Super enriching plant Sedum alfredii Hance is planted in experimental field selection, and soil uses composite organic acid+3% by the way of filling is drenched
Tween 80, wherein ethylenediamine tetra-acetic acid 40%, tartaric acid 15%, malic acid 5%, citric acid 10%, glutamic acid N, N- diethyls
Acid 10%, sulfamic acid 10%；According to above-mentioned ratio, before plantation, florescence and fruiting period pouring filling is carried out to soil, after drenching and filling,
After Sedum alfredii Hance harvesting, the total amount of Cd, Pb, Cu, Zn, Cr, the Hg in contaminated site soil is determined, found with organic composite acid
The ratio for the treatment of is not used the obvious differences of any Treatment with activating agent, and this explanation the method can reach significant soil with much money
Category control effect.
Each total metalses compare in soil after the before processing of table 3
Embodiment 4
Super enriching plant Sedum alfredii Hance, black nightshade, chenopodium ambrosiodies and nettle are planted in experimental field selection, and soil is by the way of filling is drenched
Using composite organic acid, wherein ethylenediamine tetra-acetic acid 34%, tartaric acid 20%, malic acid 8%, lemon 16% is sour, glutamic acid N,
N- oxalic acid 5%, sulfamic acid 5%；In whole growth cycle, spray 3 times, determine the content of heavy metal in plant.
Plant and pedotheque processing method：
Plant sample processing method：Plant sample cleans drying with distilled water, crushes, and makes all to cross 0.5mm nylon mesh, adopts
Dry ashing method is used, weigh 2.0g plant samples carries out pre- ashing in porcelain crucible on electric hot plate, after sample major part is carbonized,
High-temperature electric resistance furnace is moved into, 500 DEG C are progressively warming up to, ashing is (if after the charcoal of remaining is relatively more than cooling in ash content, add a few drop nitric acid
HNO3, after being evaporated to dryness, continue to be ashed completely in high-temperature electric resistance furnace), ashing time is 12h；3ml dissolving with hydrochloric acid ash contents are added,
If necessary, filter, with distilled water constant volume 50mL.
Pedotheque treatment：Pedotheque is air-dried, and crosses 0.25mm sieves, and 6h, plus 5mL volumes are ashed in 550 DEG C of high temperature
Ratio is 1:3HNO3The dense Mixed Acids Digestions of-HCl, ash content, filtering, constant volume are dissolved with HCl.
Rear enriching heavy metal compares (mg/kg) enriching plant of table 4 before treatment
From table 4 it can be seen that, in several super enriching plants, using heavy metal activator after, in vivo enrichment a huge sum of money
The content of category is significantly higher than the control treatment of unused heavy metal activator, and this explanation, soil uses rear heavy metal activator
Afterwards, super enriching plant can take away more heavy metal-polluted soils, and this will shorten the cycle of phytoremediation, accelerate reparation process.
In embodiment more than, it can be seen that the fast repairing method of heavy-metal contaminated soil of the invention, by swashing
Agent living, effectively facilitated carbonate combine state in soil, organic matter combination state, ferrimanganic aluminum oxide combination state, residual form to
The conversion of available state, improves absorption, enrichment and the volatilization of plant heavy metal, so that in taking away soil in a short time more
Many heavy metal ion, are a kind of a kind of methods for quickly, thoroughly solving heavy metal pollution.
The above, is only highly preferred embodiment of the present invention and control case study on implementation, not makees other forms to the present invention
Limitation, any those of ordinary skill in the art are changed or are modified as equivalent change using the technology contents of the disclosure above
The Equivalent embodiments of change.In every case it is, without departing from technical solution of the present invention content, to implement to more than according to technical spirit of the invention
Any modification, equivalent variations and remodeling that example is made, still fall within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of quick reparation activator of heavy-metal contaminated soil, its composition is as follows：Ethylenediamine tetra-acetic acid, tartaric acid, apple
Tartaric acid, citric acid, glutamic acid N, two or more arbitrary proportions in N- oxalic acid, EDDS or sulfamic acid it is mixed
Close.
2. the quick reparation activator of heavy-metal contaminated soil according to claim 1, it is characterised in that：The activation
The agent also surfactant including 3~7 weight %.
3. the quick reparation activator of heavy-metal contaminated soil according to claim 1, it is characterised in that：The surface
Activating agent is one or two in agriculture breast 1602 or Tween 80.
4. the quick reparation activator of heavy-metal contaminated soil according to claim 1, it is characterised in that：The activation
The formula of agent is：Ethylenediamine tetra-acetic acid, tartaric acid, malic acid, citric acid, glutamic acid N, N- oxalic acid, EDDS
And sulfamic acid, its weight portion is respectively 30~40：10~20：3~10：10~20：8~15：3~10：2~10.
5. the quick reparation activator of heavy-metal contaminated soil according to claim 4, it is characterised in that：The activation
The agent also surfactant including 3~7 weight portions.
6. the quick reparation activator of heavy-metal contaminated soil according to claim 5, it is characterised in that：The surface
Activating agent is one or two in agriculture breast 1602 or Tween 80.
7. a kind of fast repairing method of heavy-metal contaminated soil, its step is as follows：
(1) composite organic acid is mixed, is then watered, irrigate or spray by way of, in applying rehabilitating soil；
(2) in the soil after having used activator, super enriching plant is planted, the heavy metal ion to free state is enriched with
And absorption；
(3) in the whole growth cycle of enriching plant, it is watered using the composite organic acid in step (1), by irrigating or spraying
The mode of pouring, in applying rehabilitating soil.
8. the fast repairing method of heavy-metal contaminated soil according to claim 7, it is characterised in that：The step (1)
Described in the formula of composite organic acid be：Ethylenediamine tetra-acetic acid, tartaric acid, malic acid, citric acid, glutamic acid N, N- oxalic acid,
EDDS and sulfamic acid, its weight portion are respectively 30~40：10~20：3~10：10~20：8~15：3~
10：2~10.
9. the fast repairing method of heavy-metal contaminated soil according to claim 8, it is characterised in that：The step (1)
Described in the surfactant of 3~7 weight portions is added in composite organic acid, be made activator.
10. the fast repairing method of heavy-metal contaminated soil according to claim 7, it is characterised in that：The step (1)
It is with the ratio being watered described in step (3)：Composite organic acid：Water ≈ 1:3000~1:20000；Described in the step (2)
Super enriching plant is：Sedum alfredii Hance, black nightshade, chenopodium ambrosiodies or nettle；The addition of composite organic acid described in the step (3) is divided into
2~3 times, respectively early stage, mid-term and later stage；The mu of composite organic acid or activator described in the step (1) and step (3)
Consumption is 10~20kg/ times.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417471A (en) * | 2017-09-06 | 2017-12-01 | 汪建利 | Fertilizer saves half, the soil fertility activator and preparation method thereof of the crop not underproduction |
| CN107418583A (en) * | 2017-06-27 | 2017-12-01 | 浙江大学 | Preparation method for the plant source heavy metal-polluted soil activator of lead-contaminated soil |
| CN107916109A (en) * | 2017-10-16 | 2018-04-17 | 浙江大学 | A kind of method that Cadmium in Soil activator is prepared using active substance of plant |
| CN108517212A (en) * | 2018-02-02 | 2018-09-11 | 吴洪生 | A kind of soil heavy metal combined pollution eluant, eluent production method and application |
| CN108941177A (en) * | 2018-09-10 | 2018-12-07 | 江西夏氏春秋环境股份有限公司 | It is a kind of for repairing the eluent and its application method of Cu, Pb, As combined contamination soil |
| CN109365499A (en) * | 2018-10-26 | 2019-02-22 | 知合环境（北京）有限责任公司 | A kind of subsurface system, its laying method and purposes |
| CN109590326A (en) * | 2018-12-28 | 2019-04-09 | 安徽农业大学 | A kind of plant restoration method of heavy-metal contaminated soil |
| CN110305668A (en) * | 2019-04-11 | 2019-10-08 | 苏州市宏宇环境科技股份有限公司 | Heavy metals in paddy soils eluent and preparation method thereof |
| CN111085537A (en) * | 2019-12-07 | 2020-05-01 | 重庆市固体废物管理服务中心有限公司 | Method for restoring heavy metal contaminated soil by using organic phosphorus and inorganic phosphorus materials |
| CN112974505A (en) * | 2021-01-28 | 2021-06-18 | 中国电建集团江西省电力建设有限公司 | Method for restoring rice field soil cadmium pollution by using activator and nitrogen-fixing blue algae |
| CN113351640A (en) * | 2021-06-03 | 2021-09-07 | 西安理工大学 | Method for repairing cadmium and lead combined polluted soil by combining chelating agent with ryegrass |
| CN113751494A (en) * | 2021-09-01 | 2021-12-07 | 环保桥(湖南)生态环境工程股份有限公司 | Method capable of accelerating removal of heavy metals in soil and realizing safe production of crops |
| CN114160570A (en) * | 2021-12-08 | 2022-03-11 | 中国农业科学院农田灌溉研究所 | Remediation method for heavy metal cadmium contaminated soil |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418583B (en) * | 2017-06-27 | 2020-01-14 | 浙江大学 | Preparation method of plant-source soil heavy metal activator for lead-polluted soil |
| CN107418583A (en) * | 2017-06-27 | 2017-12-01 | 浙江大学 | Preparation method for the plant source heavy metal-polluted soil activator of lead-contaminated soil |
| CN107417471A (en) * | 2017-09-06 | 2017-12-01 | 汪建利 | Fertilizer saves half, the soil fertility activator and preparation method thereof of the crop not underproduction |
| CN107916109A (en) * | 2017-10-16 | 2018-04-17 | 浙江大学 | A kind of method that Cadmium in Soil activator is prepared using active substance of plant |
| CN107916109B (en) * | 2017-10-16 | 2020-02-18 | 浙江大学 | Method for preparing soil cadmium activator by using plant active substances |
| CN108517212A (en) * | 2018-02-02 | 2018-09-11 | 吴洪生 | A kind of soil heavy metal combined pollution eluant, eluent production method and application |
| CN108941177A (en) * | 2018-09-10 | 2018-12-07 | 江西夏氏春秋环境股份有限公司 | It is a kind of for repairing the eluent and its application method of Cu, Pb, As combined contamination soil |
| CN109365499A (en) * | 2018-10-26 | 2019-02-22 | 知合环境（北京）有限责任公司 | A kind of subsurface system, its laying method and purposes |
| CN109590326A (en) * | 2018-12-28 | 2019-04-09 | 安徽农业大学 | A kind of plant restoration method of heavy-metal contaminated soil |
| CN110305668A (en) * | 2019-04-11 | 2019-10-08 | 苏州市宏宇环境科技股份有限公司 | Heavy metals in paddy soils eluent and preparation method thereof |
| CN110305668B (en) * | 2019-04-11 | 2021-02-26 | 苏州市宏宇环境科技股份有限公司 | Rice soil heavy metal eluting agent and preparation method thereof |
| CN111085537A (en) * | 2019-12-07 | 2020-05-01 | 重庆市固体废物管理服务中心有限公司 | Method for restoring heavy metal contaminated soil by using organic phosphorus and inorganic phosphorus materials |
| CN112974505A (en) * | 2021-01-28 | 2021-06-18 | 中国电建集团江西省电力建设有限公司 | Method for restoring rice field soil cadmium pollution by using activator and nitrogen-fixing blue algae |
| CN112974505B (en) * | 2021-01-28 | 2021-12-24 | 中国电建集团江西省电力建设有限公司 | Method for restoring rice field soil cadmium pollution by using activator and nitrogen-fixing blue algae |
| CN113351640A (en) * | 2021-06-03 | 2021-09-07 | 西安理工大学 | Method for repairing cadmium and lead combined polluted soil by combining chelating agent with ryegrass |
| CN113751494A (en) * | 2021-09-01 | 2021-12-07 | 环保桥(湖南)生态环境工程股份有限公司 | Method capable of accelerating removal of heavy metals in soil and realizing safe production of crops |
| CN114160570A (en) * | 2021-12-08 | 2022-03-11 | 中国农业科学院农田灌溉研究所 | Remediation method for heavy metal cadmium contaminated soil |
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Application publication date: 20170613 |