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Remediation medicament for treating heavy metal contaminated soil and method for treating heavy metal contaminated soil by virtue of remediation medicament

A remediation agent and a technology for polluted soil, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of poor dearsenic effect, high solubility, and low stability of arsenic calcium residues, etc. To achieve the effect of good governance effect, simple operation and stable repair effect

Inactive Publication Date: 2018-08-07
格丰科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Arsenic-calcium slag has low stability and high solubility, so it is not effective to remove arsenic when used alone

Method used

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  • Remediation medicament for treating heavy metal contaminated soil and method for treating heavy metal contaminated soil by virtue of remediation medicament
  • Remediation medicament for treating heavy metal contaminated soil and method for treating heavy metal contaminated soil by virtue of remediation medicament
  • Remediation medicament for treating heavy metal contaminated soil and method for treating heavy metal contaminated soil by virtue of remediation medicament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A remediation agent for treating heavy metal polluted soil, the remediation agent includes the following raw materials in weight percentage: 47.8% ferrous sulfate, 21.69% iron-based modified zeolite, 3.39% potassium permanganate, 27.12% calcium oxide, the The raw materials are respectively ground into materials with a particle size of 10-200 mesh, and mixed evenly in proportion.

[0029] The remediation agent obtained above was used to treat the heavy metal-contaminated soil, and the heavy metal-contaminated soil was taken from a site in Jiangxi Province, and the soil sample was determined by the heavy metal detection method stipulated in the "Identification Standard for Hazardous Waste Leach Toxicity" (GB5085.3-2007) The content of arsenic in the soil is mainly arsenic pollution, accompanied by lead, nickel and cadmium pollution. The total arsenic content in the soil is 3204mg / kg, the lead content is 297.3mg / kg, and the nickel content is 745.8mg / kg. kg, the cadmium con...

Embodiment 2

[0031] A repairing agent for controlling heavy metal-contaminated soil, the repairing agent includes the following raw materials in weight percentage: 40% ferrous sulfate, 10% ferric sulfate, 13% iron-based modified bentonite, 2% potassium permanganate, 15% % Calcium Oxide, 20% Magnesium Oxide, each raw material is ground into a material with a particle size of 10-200 mesh respectively, and mixed evenly in proportion.

[0032] The remediation agent obtained above was used to treat the heavy metal-contaminated soil, and the heavy metal-contaminated soil was taken from a site in Jiangxi Province, and the soil sample was determined by the heavy metal detection method stipulated in the "Identification Standard for Hazardous Waste Leach Toxicity" (GB5085.3-2007) The content of arsenic in the soil is mainly arsenic pollution, accompanied by lead, nickel and cadmium pollution. The total arsenic content in the soil is 9300mg / kg, the lead content is 26.77mg / kg, and the nickel content is...

Embodiment 3

[0034] A repairing agent for controlling heavy metal-contaminated soil, the repairing agent includes the following raw materials in weight percentage: 40% ferrous sulfate, 10% ferric sulfate, 13% iron-based modified bentonite, 2% potassium permanganate, 15% % Calcium Oxide, 15% Magnesium Oxide, and 5% Sodium Sulfide. Grind each raw material into a material with a particle size of 10-200 mesh, and mix them uniformly in proportion.

[0035]The remediation agent obtained above was used to treat the heavy metal-contaminated soil, and the heavy metal-contaminated soil was taken from a site in Jiangxi Province, and the soil sample was determined by the heavy metal detection method stipulated in the "Identification Standard for Hazardous Waste Leach Toxicity" (GB5085.3-2007) The content of arsenic in the soil is mainly arsenic pollution, accompanied by lead, nickel and cadmium pollution. The total arsenic content in the soil is 3227mg / kg, the lead content is 564mg / kg, and the nickel c...

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Abstract

The invention discloses a remediation medicament for treating heavy metal contaminated soil and a method for treating the heavy metal contaminated soil by virtue of the remediation medicament. The remediation medicament contains the following raw materials in percentage by weight: 1%-10% of an oxidant, 30%-70% of an iron-based compound, 10%-60% of modified mineral materials and 10%-40% of a pH regulator. The remediation medicament is prepared by the steps of respectively grinding the raw materials into 10-200-mesh materials, and mixing in a proportion. When the remediation medicament is utilized for treating heavy contaminated soil, the operation method is simple and convenient, and the treatment effect is remarkable. Compared with traditional medicaments, the remediation medicament has the advantages that the raw material sources are rich, and the remediation medicament is low in price and suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a remediation agent for treating heavy metal-contaminated soil and a method for treating heavy-metal-contaminated soil. Background technique [0002] Arsenic is a non-metallic element that exists widely in nature and is carcinogenic. Various human activities, such as mining, smelting, fertilization, use of pesticides, waste water discharge and waste dumping, etc., lead to the increase of local soil arsenic, lead, nickel and cadmium content. The minimum concentration of arsenic to produce toxic effects on crops is 3mg / L, and it is also highly toxic to aquatic organisms. Arsenic and arsenic compounds can generally enter the human body through water, air and food, causing harm. Therefore, arsenic pollution has become one of the most serious environmental problems in the world. [0003] With the development of industry and agriculture and the wide appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/10
CPCB09C1/08C09K17/10
Inventor 邱根萍曾欠鹏龚梅玲奉向东许剑
Owner 格丰科技材料有限公司
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