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In-situ repair method of heavy metal polluted soil

A technology for in-situ remediation of polluted soil, applied in the field of soil pollution remediation, can solve the problems of poor effect of ordinary treatment methods of heavy metal-contaminated soil, and achieve the effects of stable structure, wide functions and low cost

Inactive Publication Date: 2017-05-31
ZHENJIANG HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the problem that the common treatment method for heavy metal-contaminated soil in the prior art is not effective, the present invention proposes an efficient and low-cost in-situ repair method for heavy metal-contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An in-situ repair method for heavy metal contaminated soil, comprising the steps of:

[0021] (1) Prepare restoration raw materials according to the following formula by weight: 18 parts of crushed straw, 3 parts of modified lignin, 12 parts of peat, 6 parts of leguminous plant root, stem and leaf shell waste, 13 parts of kaolin, 13 parts of hypochlorous acid Salt, 3 parts of calcium hydroxide, 4 parts of mercapto resin, 1 part of decolorizing agent, 5 parts of biological enzyme, 16 parts of microbial bacteria, 3 parts of edible fungus residue;

[0022] Among them, the microbial bacteria include Arthrobacter, Gibberella and Bacillus subtilis with a mass ratio of 2:6:3, and each gram of culture medium of a single species of bacteria contains no less than 200 million active bacteria; Crop stalks of grass seeds; the modified lignin is modified by pickling; the decolorizer is a mixture of anhydrous aluminum sulfate, granular activated carbon, and bentonite in a mass ratio o...

Embodiment 2

[0027] An in-situ repair method for heavy metal contaminated soil, comprising the steps of:

[0028] (1) Prepare restoration raw materials according to the following formula by weight: 25 parts of crushed straw, 9 parts of modified lignin, 18 parts of peat, 12 parts of leguminous plant root, stem, leaf and shell waste, 18 parts of kaolin, 15 parts of hypochlorous acid Salt, 6 parts of calcium hydroxide, 9 parts of mercapto resin, 1-5 parts of decolorizing agent, 10 parts of biological enzyme, 25 parts of microbial bacteria, 5 parts of edible fungus residue;

[0029] Among them, the microbial bacteria include Arthrobacter, Gibberella and Bacillus subtilis with a mass ratio of 2:6:3, and each gram of culture medium of a single species of bacteria contains no less than 200 million active bacteria; Crop stalks of grass seeds; the modified lignin is modified by pickling; the decolorizer is a mixture of anhydrous aluminum sulfate, granular activated carbon, and bentonite in a mass r...

Embodiment 3

[0034] An in-situ repair method for heavy metal contaminated soil, comprising the steps of:

[0035] (1) Prepare restoration raw materials according to the following formula by weight: 22 parts of crushed straw, 6 parts of modified lignin, 15 parts of peat, 9 parts of leguminous plant root, stem and leaf shell waste, 15 parts of kaolin, 14 parts of hypochlorous acid Salt, 5 parts of calcium hydroxide, 7 parts of mercapto resin, 3 parts of decolorizing agent, 8 parts of biological enzyme, 20 parts of microbial bacteria, 4 parts of edible fungus residue;

[0036] Among them, the microbial bacteria include Arthrobacter, Gibberella and Bacillus subtilis with a mass ratio of 2:6:3, and each gram of culture medium of a single species of bacteria contains no less than 200 million active bacteria; Crop stalks of grass seeds; the modified lignin is modified by pickling; the decolorizer is a mixture of anhydrous aluminum sulfate, granular activated carbon and bentonite in a mass ratio o...

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Abstract

The invention discloses an in-situ repair method of heavy metal polluted soil. Proper straw crushing matters, grass carbons, modified lignin and leguminous plant rhizome leaf shell wastes are selected according to characteristics of the heavy metal polluted soil, and are optimally combined with a chemical absorbing agent and a microbial agent; all the raw materials are mixed according to a certain method to perform in-situ repair for the soil; firstly, the straw crushing matters, grass carbons, modified lignin and leguminous plant rhizome leaf shell wastes are separated out under the effect of other chemical agents; through combination with the auxiliary coordination effect of the chemical absorbing agent, and assistance by mutual growing substrates and raw materials formed by useful substances and secretions thereof generated in the growth process of each microorganism, a microorganism group with complex composition, stable structure, wide functions and multiple bacteria is formed through mutual symbiosis and proliferation effect; the mutual benefit is realized in the purifying process of the soil containing heavy metal; the maximum unite advantage is exerted; and the method is efficient in treatment effect, low in cost and prominent in economic benefit.

Description

technical field [0001] The invention relates to a soil pollution restoration method, in particular to an in-situ restoration method of heavy metal polluted soil and its application. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of heavy metal products. Heavy metals are not easy to move and dissolve, and cannot be excreted after entering the organism, which will cause chronic poisoning. Different from the pollution of other organic compounds, heavy metals are enriched, and heavy metal pollution is difficult to degrade naturally. For example, heavy metals such as lead and cadmium enter the soil environment, which will accumulate for a long time and destroy the self-purification ability of the soil, making the soil a "reservoir of pollutants." ". Planting crops on this kind of land, heavy metals ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10C09K17/40
CPCB09C1/105B09C2101/00C09K17/40
Inventor 张瑜
Owner ZHENJIANG HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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