Remediation agent for heavy metal compound contaminated soil and use method
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A technology for compounding pollution and remediation agents, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of poor remediation efficiency and high cost of remediation agents, and achieve good results.
Inactive Publication Date: 2021-06-11
PEKING UNIV
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[0007] Aiming at the problems of high cost and poor remediation effect of the existing curing and stabilizing agents, the present invention provides a remediation agent for compound-contaminated soil containing heavy metals such as arsenic, antimony, copper, zinc, and cadmium, and a method for using the same. The repair agent is economically available, has good stabilizing effects, no secondary pollution, and has the advantages of simple operation method and strong applicability, so as to solve the problems of high repair agent cost and poor repair efficiency in the prior art.
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Embodiment 1
[0042] First of all, this example provides a restoration agent for the solidification and stabilization of heavy metal-contaminated soils such as arsenic, antimony, copper, zinc, and cadmium, which includes the following components:
[0043] (1) conditioning agent, in the present embodiment, used conditioning agent is made up of ferrous sulfate, ferric sulfate and reduced iron powder. Wherein, the addition of ferrous sulfate is 1.5% of the quality of polluted soil, the addition of iron sulfate is 0.5% of the quality of polluted soil, and the addition of reduced iron powder is 0.5% of the mass of polluted soil;
[0044] (2) stabilizer, in the present embodiment, used stabilizer is made up of biochar and zeolite powder. Wherein, the biochar is reed biochar, and its addition amount is 1.0% of the mass of the polluted soil, and the addition amount of the zeolite powder is 0.5% of the mass of the polluted soil.
[0045] Next, the present embodiment provides a method for using a re...
Embodiment 2
[0052] First of all, this embodiment provides a restoration agent for solidification and stabilization of heavy metal-contaminated soil containing arsenic and antimony, including the following components:
[0053] (1) conditioning agent, in the present embodiment, used conditioning agent is made up of ferrous sulfate, ferric sulfate and reduced iron powder. Wherein, the addition of ferrous sulfate is 1.5% of the quality of polluted soil, the addition of iron sulfate is 1.0% of the quality of polluted soil, and the addition of reduced iron powder is 0.8% of the mass of polluted soil;
[0054] (2) stabilizer, in the present embodiment, used stabilizer is made up of biochar and zeolite powder. Wherein, the biochar is straw biochar, and its addition amount is 1.0% of the mass of the polluted soil, and the addition amount of the zeolite powder is 1.0% of the mass of the polluted soil.
[0055] Next, the present embodiment provides a method for using a remediation agent for compoun...
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Abstract
The invention provides a remediation agent for heavy metal compound contaminated soil and a use method. The remediation agent comprises a conditioner and a stabilizer, and the conditioner is composed of ferrous sulfate, ferric sulfate and reduced iron powder, and the stabilizer is composed of charcoal and zeolite powder. By the adoption of the remediation agent, more than 95% of leached arsenic and antimony and more than 80% of leached copper, zinc, cadmium and other heavy metals in the soil subjected to combined pollution of the arsenic, antimony, copper, zinc, cadmium and other heavy metals can be solidified and stabilized at the same time, and efficient remediation of the soil subjected to combined pollution of the arsenic, antimony, copper, zinc, cadmium and other heavy metals is achieved. In addition, the remediation agent does not need to be prepared through a specific preparation method, and has the advantages of being economical, easy to obtain and free of pollution hidden danger. Meanwhile, the raw materials for preparing the remediation agent are low in price, simple and easy to obtain in the field. Therefore, the remediation agent provided by the invention has the advantages of being good in stabilization effect, economical, easy to obtain, free of secondary pollution, simple in operation method, high in applicability and the like.
Description
technical field [0001] The invention relates to the technical field of soil ecological restoration, and mainly relates to a restoration agent and a use method for compound polluted soil containing heavy metals such as arsenic, antimony, copper, zinc, and cadmium. Background technique [0002] my country is the largest antimony ore mining country in the world, and the antimony ore in my country basically contains a large amount of arsenic. As the main elements of heavy metal pollution, arsenic, antimony, copper, zinc and cadmium are often discharged into the environment along with the "three wastes" pollution caused by industrial production, causing a large amount of soil pollution. Heavy metals such as arsenic, antimony, copper, zinc, and cadmium that enter the soil can enter the human body through the food chain, causing carcinogenic, teratogenic, mutagenic and other health hazards to the human body. [0003] At present, the commonly used soil heavy metal treatment methods...
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