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Combined method for repairing site soil through plant bionics, chemical leaching and microorganisms

A plant bionic and chemical leaching technology, applied in the field of soil remediation, can solve the problems that soil can only be used for construction, long remediation time and high cost, and achieves the effects of easy promotion and application, short remediation time and increased efficiency

Inactive Publication Date: 2016-12-07
北京新源智慧水务科技有限公司
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Problems solved by technology

The guest-soil method requires a large amount of clean soil and is expensive; chemical fixation and chemical leaching can reduce the concentration of soil pollutants, but it is easy to cause secondary pollution and damage the physical and chemical properties of the soil. The restored soil can only be used for construction etc.; electrodynamic restoration technology is currently immature, and it is difficult to popularize and apply it on a large scale; phytoremediation and microbial remediation will be restricted by the basic properties of the soil, and the restoration time is long and the efficiency is low

Method used

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  • Combined method for repairing site soil through plant bionics, chemical leaching and microorganisms

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example 1

[0026] The test site is located in the abandoned chemical industry park in Zhuzhou, Hunan, the soil pH is 5.63, and the heavy metal Cd content is 6.25 mg·kg -1 , it has been determined that other heavy metals do not exceed the standard, so the target pollutant is the heavy metal Cd, and it is jointly repaired.

[0027] Experimental sampling was conducted to investigate the soil pollution status of the abandoned chemical industry park, to determine the spatial distribution map of heavy metal Cd, and to formulate a joint restoration plan in a targeted manner. The filler with good adsorption capacity for Cd is selected to make a plant bionic restoration device for bionic restoration of plants. At the same time, a leaching agent with a better leaching effect on Cd was selected for chemical leaching in combined restoration to change the existing form of Cd in the soil.

[0028] According to the test plan, the plant bionic restoration device was inserted, and the contaminated soil ...

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Abstract

The invention discloses a combined method for repairing site soil through plant bionics, chemical leaching and microorganisms, and belongs to the technical field of soil remediation. The method comprises the steps of (1) investigating the site, and determining the variety, concentration and space distribution of target pollutants; (2) determining composition of fillers of a plant bionics repairing device and variety and concentration of a chemical leaching agent in the combined repairing method; (3) arranging the plant bionics repairing device according to the pollution situation of the site, and combining an in-situ chemical leaching technology to repair the polluted site; (4) monitoring the polluted site, sampling, and analyzing the change condition of concentration of the target pollutants to determine whether to change the plant bionics repairing device or change the composition, concentration and cleaning times of the chemical leaching agent or not; (5) after site repairing reaches the standard, recycling the plant bionics repairing device; and (6) applying a microbial agent to degrade the chemical leaching agent added into the polluted soil during the in-situ chemical leaching process, and quickening degradation of exogenous chemical substances.

Description

[0001] technology neighborhood [0002] The invention belongs to the field of soil remediation technology, and in particular relates to the joint remediation technology of polluted soil in industrial sites. Background technique [0003] In recent years, with the rapid development of economy and technology, various environmental problems have arisen. Among them, soil pollution has attracted people's attention because of its potentiality, long-term nature, and difficult treatment. Industrial site pollution is mainly soil pollution caused by chemical industry, electroplating and other industries. It has the characteristics of complex pollutants and high concentration, and it is difficult to achieve in-situ repair. [0004] At present, the commonly used soil remediation technologies mainly include the following: guest soil method, fixed stabilization method, chemical leaching, thermal desorption, electrodynamic remediation, redox remediation, phytoremediation, microbial remediati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B09C1/10B09C1/00B09C1/08
CPCB09C1/02B09C1/00B09C1/08B09C1/10
Inventor 周建强徐愿坚韩君杨立鹏何玉龙高涛周敏陈卫文张如意王蕾凡祖伟
Owner 北京新源智慧水务科技有限公司
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