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A kind of composite remediation agent for heavy metal polluted soil and its application

A technology for contaminated soil and composite remediation, applied in the field of environmental protection of contaminated soil remediation, can solve problems such as application scope, economy, operability, secondary disaster pollution remediation efficiency, etc., to reduce mobility and bioavailability, The application effect is obvious and easy to promote the application effect

Active Publication Date: 2020-07-28
ANSTEEL GRP MINING CO LTD
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  • Description
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Problems solved by technology

These methods have single or multiple disadvantages that are difficult to overcome in terms of scope of application, economy, operability, secondary disaster pollution, or restoration efficiency.

Method used

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  • A kind of composite remediation agent for heavy metal polluted soil and its application
  • A kind of composite remediation agent for heavy metal polluted soil and its application
  • A kind of composite remediation agent for heavy metal polluted soil and its application

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preparation example Construction

[0032] The preparation method of Examples 1-10: according to the weight percentage of the raw materials, the biochar and bone char are mixed, fully stirred, and then mixed with fly ash evenly to obtain the result. See Table 1.

[0033] Table 1 Composition ratio of composite remediation agent for heavy metal polluted soil in Examples 1-10

[0034] Example Biochar (kg) Bone Charcoal (kg) Fly Ash (kg) 1 50 25 25 2 40 35 25 3 40 30 30 4 40 25 35 5 45 35 20 6 45 30 25 7 45 20 35 8 55 15 30 9 55 30 15 10 55 25 20

[0035] Embodiment 1, 4, 7, 9 are used for the pilot test of the composite remediation agent of heavy metal polluted soil as follows:

[0036] From 2013 to 2014, the surface soils were collected from the heavy metal-contaminated area around the mining field in the suburbs of Anshan City and the soil in the sewage irrigation area of ​​Dongli District, Tianjin City, respectively, and th...

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Abstract

The invention relates to a compound repair agent for heavy metal polluted soil which is characterized by being prepared from the following raw materials in percent by weight: 40-55% of charcoal, 15-35% of bone powder and 15-35% of coal ash. By taking agricultural or industrial solid wastes which are wide in source and easy to obtain as a raw material, the compound repair agent is simple in process, sufficient in raw material, low in cost and obvious in application effect, reduces the heavy metal mobility and bioavailability of soil, and can solve the problem of sustainable utilization of heavymetal pollution in farmlands and fields of industrial and mineral industry. The application method is simple, the using process is labor-saving, the physical and chemical properties of soil can be also improved effectively, the fertilizer retaining and water retaining ability of soil is improved, and the compound repair agent is easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of environmental protection for remediation of polluted soil, in particular to a composite remediation agent for heavy metal polluted soil and use thereof. Background technique [0002] With the continuous acceleration of industrialization and urbanization in my country, a large number of wastes generated by mining, smelting, steel, petroleum, chemical and other industry site activities have caused industrial enterprise sites and agricultural land to suffer through surface geological effects such as the atmosphere, surface runoff and groundwater. Serious pollution. Among them, soil heavy metal pollution is particularly serious, which not only easily causes variation and degradation of soil physicochemical and biological characteristics, but also harms human health through food chain enrichment. Due to the urgency and demand of contaminated soil remediation, the research on heavy metal contaminated soil remed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08B09C1/00
CPCB09C1/00C09K17/08
Inventor 邓鹏宏许灏王志忠赵虹魏宏贺
Owner ANSTEEL GRP MINING CO LTD
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