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Microbial soil repairing agent, applications thereof, and heavy metal polluted soil repairing method

A technology of soil remediation agent and remediation method, which is applied in the field of microbial soil remediation agent and application and heavy metal contaminated soil remediation, which can solve the problems that heavy metal contaminated soil cannot be remediated, enrich organic matter and nutrient components, improve the remediation effect, and the method is simple Effect

Inactive Publication Date: 2020-03-27
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soil remediation agent only has a remedial effect on arsenic, and cannot be used for remediation of soil contaminated by other heavy metals

Method used

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  • Microbial soil repairing agent, applications thereof, and heavy metal polluted soil repairing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A microbial soil remediation agent, comprising component A and component B;

[0045] Component A is an aqueous solution of sodium lauryl sulfate with a concentration of 8 mmol / L;

[0046] Component B is composed of the following components in parts by weight: 25 parts of composite bacteria preparation, 12 parts of mature organic matter, 6 parts of humic acid, 7 parts of clay, 8 parts of fly ash and 3 parts of carboxymethyl chitosan.

[0047] The compound bacteria preparation is composed of 5% compound bacteria, 65% hectorite and 30% corn cob.

[0048] The composite bacteria are formed by mixing Bacillus licheniformis, Pseudomonas, Bacillus subtilis and Clostridium butyricum at a weight ratio of 5:2:0.5:1.

[0049] The particle size of hectorite is 200-325 mesh, and the particle size of corncob is 100-200 mesh.

[0050] The preparation method of the mature organic matter is as follows: take crop straw, chicken manure and sludge, ripen for 25 days at a temperature of 25...

Embodiment 2

[0060] A microbial soil remediation agent, comprising component A and component B;

[0061] Component A is an aqueous solution of dihexyl sodium sulfosuccinate with a concentration of 8 mmol / L;

[0062] Component B is composed of the following components in parts by weight: 28 parts of composite bacteria preparation, 13 parts of mature organic matter, 6 parts of humic acid, 8 parts of clay, 8 parts of fly ash and 4 parts of carboxymethyl chitosan.

[0063] The compound bacteria preparation is composed of 9% compound bacteria, 56% hectorite and 35% corn cob.

[0064] The composite bacteria are formed by mixing Bacillus licheniformis, Pseudomonas, Bacillus subtilis and Clostridium butyricum at a weight ratio of 5:2:1:0.5.

[0065] The particle size of hectorite is 200-325 mesh, and the particle size of corncob is 100-200 mesh.

[0066] The preparation method of the mature organic matter is as follows: take crop straw, chicken manure and sludge, ripen them for 21 days at a temp...

Embodiment 3

[0076] A microbial soil remediation agent, comprising component A and component B;

[0077] Component A is an aqueous solution of sodium methyl lauroyl taurate at a concentration of 5 mmol / L;

[0078] Component B is composed of the following components in parts by weight: 20 parts of composite bacteria preparation, 10 parts of mature organic matter, 3 parts of humic acid, 5 parts of clay, 4 parts of fly ash and 1 part of carboxymethyl chitosan.

[0079] The compound bacteria preparation is composed of 3% compound bacteria, 70% hectorite and 27% corn cob.

[0080] The composite bacteria are formed by mixing Bacillus licheniformis, Pseudomonas, Bacillus subtilis and Clostridium butyricum in a weight ratio of 4:2:0.5:0.5.

[0081] The particle size of hectorite is 200-325 mesh, and the particle size of corncob is 100-200 mesh.

[0082] The preparation method of the mature organic matter is as follows: take crop straw, chicken manure and sludge, ripen them for 30 days at a tempe...

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Abstract

The invention discloses a microbial soil repairing agent, applications thereof, and a heavy metal polluted soil repairing method. The microbial soil repairing agent comprises a component A and a component B; the component A is a water solution of a surfactant; and the component B comprises following components in parts by weight: 20 to 30 parts of a composite inoculant, 10 to 15 parts of an aged organic substance, 3 to 8 parts of humic acid, 5 to 12 parts of clay, 4 to 10 parts of fly ash, and 1 to 5 parts of carboxymethyl chitosan. According to the repairing method, the water content of the soil system is controlled to ensure that all components in the repairing agent can better exert effect, and the soil repairing effect is improved. The provided repairing agent can repair multiple kindsof heavy metal polluted soil, and is capable of avoiding secondary pollution during the repairing process, the repairing period is short, and the repairing effect is good. The provided heavy metal polluted soil repairing method has the advantages of simpleness, low energy consumption, and environmental friendliness, and has a very good application prospect.

Description

technical field [0001] The invention belongs to the field of microbial soil remediation, and more specifically relates to a microbial soil remediation agent and its application and a method for remediation of heavy metal polluted soil. Background technique [0002] Soil heavy metal pollution refers to the problem that the content of trace metal elements in the soil exceeds the background value and excessive deposition due to human activities, which is collectively referred to as soil heavy metal pollution. [0003] Heavy metals generally refer to about 60 elements with a specific gravity above 4.0 or about 45 elements with a specific gravity above 5.0. Heavy metals in environmental pollution research mainly refer to elements with significant biological toxicity such as Pb, Cd, Hg, Cr, and metalloid As, and also include heavy metals such as Zn, Cu, Co, Ni, and Sn with certain toxicity. Some heavy metal elements are essential elements for the human body and other organisms, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/10
CPCB09C1/10B09C2101/00C09K17/40
Inventor 李孝梅吕正勇魏丽秦森苗竹倪鑫鑫刘泽军
Owner BEIJING GEOENVIRON ENG & TECH
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