Heavy metal fixing agent and in-situ remediation method for heavy metal polluted soil

A technology of heavy metals and fixatives, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of process control, low treatment efficiency, large amount of use, etc., to achieve inhibition of growth and reproduction, treatment High efficiency and the effect of preventing pests and diseases

Inactive Publication Date: 2019-11-08
王彩花
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to provide a heavy metal fixative to solve the problems in the prior art of removing heavy metals of single type, large amount of use, low treatment efficiency, difficult process control, and inability to completely eliminate its toxicity

Method used

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  • Heavy metal fixing agent and in-situ remediation method for heavy metal polluted soil
  • Heavy metal fixing agent and in-situ remediation method for heavy metal polluted soil

Examples

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example 1

[0058] The heavy metal solidifying agent raw material weight composition that this example adopts is:

[0059] 60 parts of peat, 3 parts of Y-type nano molecular sieve, 5 parts of Bacillus subtilis, 3 parts of Acetobacter aceti, 5 parts of Bacillus licheniformis, 3 parts of Clostridium pasteurianus.

[0060] Among them, due to the wide range of heavy metal-contaminated soils used, the heavy metal curing agent requires a large amount. Therefore, this example has processed and packaged the heavy metal curing agent, which specifically includes the following steps:

[0061] Step 1. prepare raw materials by weight;

[0062] Step 2. The peat is sterilized by cobalt 60 radiation, and the radiation dose is 1.0kGy;

[0063] uniformly mixing the sterilized peat with Bacillus subtilis, Acetobacter aceti, Bacillus licheniformis and Clostridium pasteuriani, packaging the mixture to obtain the first package;

[0064] Step 3. packaging the Y-type nano molecular sieve separately to obtain t...

example 2

[0072] The heavy metal solidifying agent raw material weight composition that this example adopts is:

[0073] 50 parts of peat, 5 parts of Y-type nano molecular sieve, 1 part of Bacillus subtilis, 5 parts of Acetobacter aceti, 10 parts of Bacillus licheniformis, 1 part of Clostridium pasteuriani.

[0074] Among them, due to the wide range of heavy metal-contaminated soils used, the heavy metal curing agent requires a large amount. Therefore, this example has processed and packaged the heavy metal curing agent, which specifically includes the following steps:

[0075] Step A. prepare raw materials by weight;

[0076] Step 2. The peat is sterilized by cobalt 60 radiation, and the radiation dose is 18kGy;

[0077] uniformly mixing the sterilized peat with Bacillus subtilis, Acetobacter aceti, Bacillus licheniformis and Clostridium pasteuriani, packaging the mixture to obtain the first package;

[0078] Step 3. packaging the Y-type nano molecular sieve separately to obtain the ...

example 3

[0086] The heavy metal solidifying agent raw material weight composition that this example adopts is:

[0087] 70 parts of peat, 1 part of Y-type nano molecular sieve, 8 parts of Bacillus subtilis, 1 part of Acetobacter aceti, 4 parts of Bacillus licheniformis, 5 parts of Clostridium pasteuriani.

[0088] Among them, due to the wide range of heavy metal-contaminated soils used, the heavy metal curing agent requires a large amount. Therefore, this example has processed and packaged the heavy metal curing agent, which specifically includes the following steps:

[0089] Step A. prepare raw materials by weight;

[0090] Step 2. The peat is sterilized by cobalt 60 radiation, and the radiation dose is 10kGy;

[0091] uniformly mixing the sterilized peat with Bacillus subtilis, Acetobacter aceti, Bacillus licheniformis and Clostridium pasteuriani, packaging the mixture to obtain the first package;

[0092] Step 3. packaging the Y-type nano molecular sieve separately to obtain the s...

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Abstract

The invention discloses a heavy metal fixing agent and an in-situ remediation method of heavy metal contaminated soil. The heavy metal fixing agent comprises the following raw materials in parts by weight: 50-70 parts of peat, 1-5 parts of a nano molecular sieve, 1-8 parts of Bacillus subtilis, 1-5 parts of acetobacter aceti, 4-10 parts of Bacillus licheniformis and 1-5 parts of Clostridium pasteurii. However, the in-situ remediation method for the heavy metal contaminated soil by using the heavy metal fixing agent mainly comprises applying the nano molecular sieve and other raw materials stepby step, and the soil needs to be turned over to be mixed evenly during application. The heavy metal fixing agent can well carry out in-situ repair on the heavy metal polluted soil, can remove various heavy metals, has high treatment efficiency, is simple and controllable to operate, and solves the problems of single heavy metal removal type, large usage amount, low treatment efficiency, difficult process control and incapability of completely eliminating toxicity in the prior art.

Description

technical field [0001] The invention belongs to the technical field of soil conditioners, and in particular relates to a heavy metal fixative and an in-situ repair method for heavy metal polluted soil. Background technique [0002] Heavy metal pollution of the soil refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. Heavy metal refers to the relative density of 4.5g / cm 3 above, or a metal with a specific gravity greater than 5. [0003] With the rapid development of industry, the expansion of urbanization, and the continuous increase in the types and quantities of agricultural chemicals used, heavy metals have entered the soil environment in large quantities. Unlike organic matter, heavy metals cannot be degraded by microorganisms and can be enriched in organisms. The long-term pollution of soil caused by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/10B09C1/00C09K101/00
CPCB09C1/00B09C1/10C09K17/40C09K2101/00
Inventor 王彩花陈林
Owner 王彩花
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