CN104498047A - Conditioner and method for remedying heavy metal soil pollution - Google Patents
Conditioner and method for remedying heavy metal soil pollution Download PDFInfo
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- CN104498047A CN104498047A CN201410707571.9A CN201410707571A CN104498047A CN 104498047 A CN104498047 A CN 104498047A CN 201410707571 A CN201410707571 A CN 201410707571A CN 104498047 A CN104498047 A CN 104498047A
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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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- 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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- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a conditioner and method for remedying heavy metal soil pollution. The conditioner is prepared from the following components in parts by weight: 20-30 parts of alkaline preparation, 2-10 parts of calcium oxide, 2-6 parts of phosphate compound, 5-15 parts of sulfur compound, 10-15 parts of metal chelator and 10-15 parts of water retention agent. The conditioner and method for remedying heavy metal soil pollution can effectively reduce multiple heavy metal pollutants in polluted soil at the same time, realize remediation and control on the heavy metal polluted soil, and are favorable in conditioning effect and simple to operate; and after remediation, the heavy metal content in the soil is lower than the national standard, thus being suitable for popularization.
Description
Technical field:
The present invention relates to soil remediation field, particularly for adjusting agent and the restorative procedure of soil pollution by heavy metal reparation.
Background technology:
Along with industrialized development, the soil contamination problem of China is day by day serious, and various trade effluent, fertilizer and pesticide all cause the heavy metal contamination of soil.The soil of these heavy metal contaminations can cause the heavy metal content of farm crop to exceed standard, and threatens food safety.The pollution problem of heavy metal-polluted soil hinders the development in city.
Research relevant at present focuses mostly at acid sulphate soils, and also comparatively scattered for the research of the improvement of this soil.And for being subject to the soil of acidifying pollution and heavy metal contamination simultaneously, have that pH is extremely low, nutritive element is deficient, heavy metal content in soil and bio-toxicity is high etc. that problem does not still have effective solution.
Summary of the invention
The object of the present invention is to provide and the invention provides a kind of adjusting agent of repairing for soil pollution by heavy metal and restorative procedure, can heavy metal effectively in stable curing contaminated soil, make the heavy metal content of contaminated soil reach leaching standard.
For the adjusting agent that soil pollution by heavy metal is repaired, obtained by the component of following weight part: alkali agents 20 ~ 30 parts, 2 ~ 10 parts, calcium oxide, phosphoric acid salt 2 ~ 6 parts, sulfocompound 5 ~ 15 parts, metal chelator 10 ~ 15 parts and water-holding agent 10 ~ 15 parts.
Described alkali agents is one in unslaked lime or white lime or two kinds.
Described phosphate compound is potassium hydrogen phosphate, secondary calcium phosphate, potassium primary phosphate wherein one or more.
Described sulfocompound is sulphur or sodium sulphite.
Described metal chelator is ethylenediamine tetraacetic acid (EDTA) an alkali metal salt.
For the restorative procedure that soil pollution by heavy metal is repaired, comprise the steps:
(1) heavy-metal contaminated soil excavation, transfer: first to needing the soil repaired to excavate, be transported to the special place of specific soil remediation;
(2) configuration of heavy-metal contaminated soil renovation agent: carry out alkali agents, calcium oxide, phosphoric acid salt, sulfocompound, metal chelator and water-holding agent to mix according to weight ratio according to claim 1 the adjusting agent obtaining and be used for soil pollution by heavy metal and repair;
(3) adjusting agent that soil pollution by heavy metal is repaired applies: polluted soil is carried out fragmentation, mixing tank is sent to after fragmentation, meanwhile according to soil: the weight ratio mixing of renovation agent=15 ~ 25:1, then be delivered to stacking place, obtain the soil after having added adjusting agent;
(4) repair: through mixed heavy metal soil after 2 ~ 5 months, the heavy metal in heavy-metal contaminated soil is reduced to immobilized heavy metal at a low price, thus loses its biological effectiveness, realizes the reparation of soil;
(5) landfill: the heavy metal soil after reparation carries out security landfill.
Beneficial effect of the present invention is: provide a kind of adjusting agent for soil pollution by heavy metal reparation and restorative procedure, effectively can reduce the various heavy pollutent in contaminated soil simultaneously, realize the repairing and treating of heavy metal contaminated soil, Adjustment effect is good, simple to operate, after repairing, heavy metal in soil content is lower than national standard, is applicable to applying.
Embodiment:
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
One, measure sample Heavy Metals from Polluted Soils with Heavy Metals content
| Pollutent | Pollutent leaching concentration (mg/L) | Leaching concentration limit value (mg/L) |
| Cadmium | 380.62 | 5 |
| Arsenic | 210.45 | 5 |
| Plumbous | 204.89 | 5 |
| Mercury | 489.12 | 5 |
Prepared by the adjusting agent of two, repairing for soil pollution by heavy metal
Embodiment one:
For the adjusting agent that soil pollution by heavy metal is repaired, obtained by the component of following weight part: alkali agents 20 parts, 2 parts, calcium oxide, phosphoric acid salt 2 parts, sulfocompound 5 parts, metal chelator 10 parts and water-holding agent 10 parts.
Described alkali agents is unslaked lime.
Described phosphate compound is potassium hydrogen phosphate and secondary calcium phosphate mixture.
Described sulfocompound is sulphur.
Described metal chelator is ethylenediamine tetraacetic acid (EDTA) an alkali metal salt.
For the restorative procedure that soil pollution by heavy metal is repaired, comprise the steps:
(1) heavy-metal contaminated soil excavation, transfer: first to needing the soil repaired to excavate, be transported to the special place of specific soil remediation;
(2) configuration of heavy-metal contaminated soil renovation agent: carry out alkali agents, calcium oxide, phosphoric acid salt, sulfocompound, metal chelator and water-holding agent to mix according to weight ratio according to claim 1 the adjusting agent obtaining and be used for soil pollution by heavy metal and repair;
(3) adjusting agent that soil pollution by heavy metal is repaired applies: polluted soil is carried out fragmentation, mixing tank is sent to after fragmentation, meanwhile according to soil: the weight ratio mixing of renovation agent=15:1, then be delivered to stacking place, obtain the soil after having added adjusting agent;
(4) repair: through mixed heavy metal soil after 2 ~ 5 months, the heavy metal in heavy-metal contaminated soil is reduced to immobilized heavy metal at a low price, thus loses its biological effectiveness, realizes the reparation of soil;
(5) landfill: the heavy metal soil after reparation carries out security landfill.
Embodiment two:
For the adjusting agent that soil pollution by heavy metal is repaired, obtained by the component of following weight part: alkali agents 25 parts, 6 parts, calcium oxide, phosphoric acid salt 4 parts, sulfocompound 10 parts, metal chelator 12 parts and water-holding agent 12 parts.
Described alkali agents is white lime.
Described phosphate compound is potassium hydrogen phosphate and potassium primary phosphate mixture.
Described sulfocompound is sulphur.
Described metal chelator is ethylenediamine tetraacetic acid (EDTA) an alkali metal salt.
For the restorative procedure that soil pollution by heavy metal is repaired, comprise the steps:
(1) heavy-metal contaminated soil excavation, transfer: first to needing the soil repaired to excavate, be transported to the special place of specific soil remediation;
(2) configuration of heavy-metal contaminated soil renovation agent: carry out alkali agents, calcium oxide, phosphoric acid salt, sulfocompound, metal chelator and water-holding agent to mix according to weight ratio according to claim 1 the adjusting agent obtaining and be used for soil pollution by heavy metal and repair;
(3) adjusting agent that soil pollution by heavy metal is repaired applies: polluted soil is carried out fragmentation, mixing tank is sent to after fragmentation, meanwhile according to soil: the weight ratio mixing of renovation agent=20:1, then be delivered to stacking place, obtain the soil after having added adjusting agent;
(4) repair: through mixed heavy metal soil after 2-5 month, the heavy metal in heavy-metal contaminated soil is reduced to immobilized heavy metal at a low price, thus loses its biological effectiveness, realizes the reparation of soil;
(5) landfill: the heavy metal soil after reparation carries out security landfill.
Embodiment three:
For the adjusting agent that soil pollution by heavy metal is repaired, obtained by the component of following weight part: alkali agents 30 parts, 10 parts, calcium oxide, phosphoric acid salt 6 parts, sulfocompound 15 parts, metal chelator 15 parts and water-holding agent 15 parts.
Described alkali agents is white lime.
Described phosphate compound is secondary calcium phosphate and potassium primary phosphate mixture.
Described sulfocompound is sodium sulphite.
Described metal chelator is ethylenediamine tetraacetic acid (EDTA) an alkali metal salt.
For the restorative procedure that soil pollution by heavy metal is repaired, comprise the steps:
(1) heavy-metal contaminated soil excavation, transfer: first to needing the soil repaired to excavate, be transported to the special place of specific soil remediation;
(2) configuration of heavy-metal contaminated soil renovation agent: carry out alkali agents, calcium oxide, phosphoric acid salt, sulfocompound, metal chelator and water-holding agent to mix according to weight ratio according to claim 1 the adjusting agent obtaining and be used for soil pollution by heavy metal and repair;
(3) adjusting agent that soil pollution by heavy metal is repaired applies: polluted soil is carried out fragmentation, mixing tank is sent to after fragmentation, meanwhile according to soil: the weight ratio mixing of renovation agent=25:1, then be delivered to stacking place, obtain the soil after having added adjusting agent;
(4) repair: through mixed heavy metal soil after 2 ~ 5 months, the heavy metal in heavy-metal contaminated soil is reduced to immobilized heavy metal at a low price, thus loses its biological effectiveness, realizes the reparation of soil;
(5) landfill: the heavy metal soil after reparation carries out security landfill.
Three, embodiment two is for after the soil of heavy metal contamination, measure sample heavy metal in soil content
| Pollutent | Pollutent leaching concentration (mg/L) | Leaching concentration limit value (mg/L) |
| Cadmium | 0.02 | 5 |
| Arsenic | 2.13 | 5 |
| Plumbous | 0.84 | 5 |
| Mercury | 1.27 | 5 |
Above-mentioned experimental result shows, conditioning agent of the present invention obviously can reduce the content of 5 heavy metal species in contaminated soil, 4 kinds of Pollutant levels in embodiment are all lower than national standard limit value, so the present invention can reduce the leaching concentration of the heavy metal in contaminated soil fast and efficiently, can be used for the improvement reparation of heavy-metal contaminated soil.
Claims (6)
1. an adjusting agent of repairing for soil pollution by heavy metal, it is characterized in that, obtained by the component of following weight part: alkali agents 20 ~ 30 parts, 2 ~ 10 parts, calcium oxide, phosphoric acid salt 2 ~ 6 parts, sulfocompound 5 ~ 15 parts, metal chelator 10 ~ 15 parts and water-holding agent 10 ~ 15 parts.
2. the reparation adjusting agent for heavy-metal contaminated soil according to claim 1, is characterized in that: described alkali agents is one in unslaked lime or white lime or two kinds.
3. adjusting agent of repairing for soil pollution by heavy metal according to claim 1, is characterized in that: described phosphate compound is potassium hydrogen phosphate, secondary calcium phosphate, potassium primary phosphate wherein one or more.
4. adjusting agent of repairing for soil pollution by heavy metal according to claim 1, is characterized in that: described sulfocompound is sulphur or sodium sulphite.
5. adjusting agent of repairing for soil pollution by heavy metal according to claim 1, is characterized in that: described metal chelator is ethylenediamine tetraacetic acid (EDTA) an alkali metal salt.
6., for the restorative procedure that soil pollution by heavy metal is repaired, it is characterized in that: comprise the steps:
(1) heavy-metal contaminated soil excavation, transfer: first to needing the soil repaired to excavate, be transported to the special place of specific soil remediation;
(2) configuration of heavy-metal contaminated soil renovation agent: carry out alkali agents, calcium oxide, phosphoric acid salt, sulfocompound, metal chelator and water-holding agent to mix according to weight ratio according to claim 1 the adjusting agent obtaining and be used for soil pollution by heavy metal and repair;
(3) adjusting agent that soil pollution by heavy metal is repaired applies: polluted soil is carried out fragmentation, mixing tank is sent to after fragmentation, meanwhile according to soil: the weight ratio mixing of renovation agent=15 ~ 25:1, then be delivered to stacking place, obtain the soil after having added adjusting agent;
(4) repair: through mixed heavy metal soil after 2 ~ 5 months, the heavy metal in heavy-metal contaminated soil is reduced to immobilized heavy metal at a low price, thus loses its biological effectiveness, realizes the reparation of soil;
(5) landfill: the heavy metal soil after reparation carries out security landfill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410707571.9A CN104498047A (en) | 2014-11-27 | 2014-11-27 | Conditioner and method for remedying heavy metal soil pollution |
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| CN201410707571.9A CN104498047A (en) | 2014-11-27 | 2014-11-27 | Conditioner and method for remedying heavy metal soil pollution |
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Cited By (9)
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| CN104845626A (en) * | 2015-05-05 | 2015-08-19 | 长沙华时捷环保科技发展有限公司 | Passivating agent for governing heavy metal contaminated soil and preparation and use method of passivating agent |
| CN105154090A (en) * | 2015-08-19 | 2015-12-16 | 东南大学 | Repair reagent for soil polluted by heavy metals and repair method |
| CN106190158A (en) * | 2016-07-26 | 2016-12-07 | 湖北都兴隆农业技术有限公司 | A kind of soil-repairing agent for administering heavy metal pollution and production method thereof |
| CN106508160A (en) * | 2016-10-14 | 2017-03-22 | 广东盆地号生物产业有限公司 | Soil improvement method |
| CN106583439A (en) * | 2016-11-22 | 2017-04-26 | 沃邦环保有限公司 | Combined remediation method for heavy metal contaminated soil |
| CN107030099A (en) * | 2017-05-26 | 2017-08-11 | 江西省环境保护科学研究院 | A kind of synchronous high-efficiency repairs the stabilizer of lead cadmium combined pollution red soil |
| CN108841397A (en) * | 2018-07-03 | 2018-11-20 | 李金磊 | A kind of mineralizer and preparation method thereof for heavy metal pollution farmland |
| CN109207157A (en) * | 2018-11-05 | 2019-01-15 | 湖南泰谷生态工程有限公司 | A kind of chelating heavy metal soil conditioner and preparation method thereof |
| CN113025339A (en) * | 2021-02-07 | 2021-06-25 | 中国环境科学研究院 | Chemical biological reduction and fixation synergistic remediation agent for chromium-contaminated soil |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845626B (en) * | 2015-05-05 | 2018-05-29 | 长沙华时捷环保科技发展股份有限公司 | For administering the passivator of heavy-metal contaminated soil and its preparation and application |
| CN104845626A (en) * | 2015-05-05 | 2015-08-19 | 长沙华时捷环保科技发展有限公司 | Passivating agent for governing heavy metal contaminated soil and preparation and use method of passivating agent |
| CN105154090A (en) * | 2015-08-19 | 2015-12-16 | 东南大学 | Repair reagent for soil polluted by heavy metals and repair method |
| CN106190158A (en) * | 2016-07-26 | 2016-12-07 | 湖北都兴隆农业技术有限公司 | A kind of soil-repairing agent for administering heavy metal pollution and production method thereof |
| CN106190158B (en) * | 2016-07-26 | 2017-06-06 | 湖北都兴隆农业技术有限公司 | A kind of soil-repairing agent and its production method for administering heavy metal pollution |
| CN106508160A (en) * | 2016-10-14 | 2017-03-22 | 广东盆地号生物产业有限公司 | Soil improvement method |
| CN106583439A (en) * | 2016-11-22 | 2017-04-26 | 沃邦环保有限公司 | Combined remediation method for heavy metal contaminated soil |
| CN107030099A (en) * | 2017-05-26 | 2017-08-11 | 江西省环境保护科学研究院 | A kind of synchronous high-efficiency repairs the stabilizer of lead cadmium combined pollution red soil |
| CN108841397A (en) * | 2018-07-03 | 2018-11-20 | 李金磊 | A kind of mineralizer and preparation method thereof for heavy metal pollution farmland |
| CN109207157A (en) * | 2018-11-05 | 2019-01-15 | 湖南泰谷生态工程有限公司 | A kind of chelating heavy metal soil conditioner and preparation method thereof |
| CN109207157B (en) * | 2018-11-05 | 2021-05-25 | 湖南泰谷生态工程有限公司 | Heavy metal chelated soil conditioner and preparation method thereof |
| CN113025339A (en) * | 2021-02-07 | 2021-06-25 | 中国环境科学研究院 | Chemical biological reduction and fixation synergistic remediation agent for chromium-contaminated soil |
| CN113025339B (en) * | 2021-02-07 | 2021-09-10 | 中国环境科学研究院 | Chemical biological reduction and fixation synergistic remediation agent for chromium-contaminated soil |
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Application publication date: 20150408 |