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Method for restoring polluted soil through coupling stimulation of electron acceptors and nutrients

An electron acceptor and polluted soil technology, applied in the restoration of polluted soil, etc., can solve the problems that are difficult to repair soil, slow removal rate, etc., achieve rapid degradation of pesticides, optimize the structure of bacterial flora, and solve the problem of time-consuming restoration Effect

Inactive Publication Date: 2017-02-15
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the physiological characteristics of the strain and the complex ecological environment of the soil, the removal rate of some pesticides by a single or compound bacterial agent is generally 10-20%, and the removal rate is slow
Therefore, the above two methods are difficult to be used to remediate soil contaminated by agricultural chemicals

Method used

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  • Method for restoring polluted soil through coupling stimulation of electron acceptors and nutrients
  • Method for restoring polluted soil through coupling stimulation of electron acceptors and nutrients

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Taking paddy field soil polluted by 50mg / kg-soil organochlorine pesticides as the research object, add iron oxide with a particle size of 50nm synthesized by the existing technology, the addition amount is 4g / kg-soil, and then add straw as raw material to produce biogas plant For the remaining biogas residue, the addition amount is 2g / kg-soil, and then the restoration experiment is carried out. Depend on figure 1 As shown, after adding iron oxide and biogas residue, the degradation of organochlorine pesticides was significantly increased compared with the control group.

Embodiment 2

[0024] Taking 200mg / kg-soil of antibiotic-contaminated paddy field soil as the research object, adding iron oxide with a particle size of 50nm synthesized by the existing technology, the addition amount is 4g / kg-soil, and then adding livestock and poultry manure as raw material to produce biogas For the remaining biogas residue, the addition amount is 2g / kg-soil. Depend on figure 2 As shown, after the addition of iron oxides and biogas residues, the degradation rate of antibiotics was significantly increased compared with the control group.

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Abstract

The invention belongs to the field of soil bioremediation and relates to a method for restoring polluted soil through the coupling stimulation of electron acceptors and nutrients. The electron acceptors and organic matter are added into the soil polluted by agricultural chemicals and conduct coupling stimulation on the polluted soil to be treated to degrade the residual agricultural chemicals in the soil to be treated. The method can obviously increase the degradation rate of the agricultural chemicals, has the advantages of low cost, no environmental pollution, quick degradation of the agricultural chemicals, soil fertility improvement and the like, and is significant to polluted soil remediation and ecological restoration of our country.

Description

technical field [0001] The invention belongs to the field of soil bioremediation, and relates to a method for stimulating and remediating polluted soil by coupling an electron acceptor and a nutrient. Background technique [0002] Agrochemicals (pesticides and antibiotics) are important inputs for agricultural production. As my country's support for agriculture and animal husbandry has increased, the agrochemical industry has developed vigorously. In 2013, my country's annual output of pesticides reached 3.2 million tons, but its utilization rate was only 10-20%, and the rest entered agricultural and animal husbandry products, soil and water bodies. The findings show that about 16 million hectares of farmland are polluted by agricultural chemicals. Therefore, remediation of polluted soil is imminent. [0003] Physical and chemical soil remediation technology requires a specific site, professional equipment, or the use of a large amount of chemical reagents. The remediatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/10B09C2101/00
Inventor 杨智满郭荣波戴萌许晓晖
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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