Sulfur-induced stabilization treatment method for iron-rich antimony polluted soil

A technology for stabilizing treatment and polluted soil, applied in the field of soil remediation, can solve the problems of secondary environmental pollution and high cost, and achieve the effect of simple operation
CN113441538AInactive Publication Date: 2021-09-28SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
Publication Date
2021-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a sulfur-induced stabilization treatment method for iron-rich antimony polluted soil, and belongs to the field of soil remediation. According to the method, S<2-> ions serve as a reducing agent and react with amorphous ferric hydroxide in the soil to release ferrous ions, part of the ferrous ions promote the amorphous ferric hydroxide in the soil to be recrystallized and converted into stable iron oxyhydroxide, meanwhile, part of the ferrous ions react with the amorphous ferric hydroxide to generate superoxide radicals, Sb (III) adsorbed on the surface of the amorphous iron hydroxide is promoted to be oxidized into the Sb(V) so as to significantly reduce the toxicity of the antimony, and the Sb (V) is embedded into the stable iron hydroxide structure during the recrystallization so as to significantly reduce the mobility of the antimony and avoid the secondary pollution caused by the release of the antimony.
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Description

technical field

[0001] The invention relates to the field of soil remediation, in particular to a sulfur-induced stabilization treatment method for iron-rich antimony-contaminated soil. Background technique

[0002] Antimony and its compounds are widely used in the production of batteries, combustion aids, papermaking, plastics, paints, glass and alloys because of their good semiconductor properties, flame retardancy, wear resistance and catalytic properties. However, due to extensive mining methods and low environmental awareness, a large amount of uncontrolled antimony enters the soil environment and water bodies. Antimony has toxic effects on microorganisms and plant growth, can inhibit the growth of plants, and is enriched in the edible parts of crops. Accumulation, exceeding the "National Food Hygiene Standard", and endangering human health. The problem of antimony pollution in the environment has attracted extensive attention of scholars at home and abroad.

[0003] ...

Claims

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