Method for restoring anofex-polycyclic aromatic hydrocarbon composite polluted soil by biological agent

A technology for compound pollution and polycyclic aromatic hydrocarbons, applied in the field of remediation of polluted soil

Inactive Publication Date: 2016-08-31
SHENYANG UNIV
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  • Application Information

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Problems solved by technology

With the continuous deepening of research on soil pollution, people have found that compound pollution is a common phenomenon of soil pollution, and the impact of compound pollution on soil factors such as soil enzymes is very different from that of single pollution. There are still few studies on the bioremediation process and mechanism of soil under the soil. Therefore, it is of great practical significance to carry out research on the combined pollution of soil organic matter, especially the remediation of DDT-PAH combined pollution.

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  • Method for restoring anofex-polycyclic aromatic hydrocarbon composite polluted soil by biological agent

Examples

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Embodiment

[0021] Example: Field experiment on agricultural polluted soil

[0022] The field test was carried out in a greenhouse in the suburbs of Xinchengzi District, Shenyang City. The land was leveled, the sundries were picked out, and the soil was turned over to make the pollutants and soil physical and chemical properties of the site to be treated as uniform as possible. piece. The concentration of DDTs and PAHs in the soil was determined to be 47.94μg·kg -1 and 0.69mg•kg -1 , the pH value is 7.2, the organic matter content is 5.437%, and the cation exchange capacity is 13.09 cmol·kg -1 . The soil is silty clay, and the proportions of clay, silt and sand are 26.11%, 72.82% and 1.07%, respectively.

[0023] The cultivated layer of 0-20cm is the research target layer, and blood meal and rhamnolipid are added to each test plot to make the blood meal concentration 5g·kg -1 , the rhamnolipid concentration is 5mg•kg -1 . Water regularly to keep the moisture content of the soil at ...

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Abstract

The invention relates to a polluted soil restoring method, and concretely relates to a method for restoring anofex-polycyclic aromatic hydrocarbon composite polluted soil by a biological agent. The method utilizes the degradation effect of indigenous microorganisms on pollutants, and is a method for in situ restoration of anofex-polycyclic aromatic hydrocarbon composite polluted farmland soil by a biological surfactant rhamnolipid reinforced blood powder, the blood powder is added to stimulate the indigenous microorganisms in order to activate the activity of the indigenous microorganisms, and the biological surfactant rhamnolipid is used to realize a compatibilization effect on organic pollutants and enhance degradation of DDTs and PAHs in the soil in order to realize restoration of DDTs and PAHs pollution in the soil; and the blood powder is added to the DDTs-PAHs composite polluted soil according to a ratio of the blood powder to the polluted soil of 5g/1000g, and the blood powder and the polluted soil are uniformly mixed. The method for in situ restoration of anofex-polycyclic aromatic hydrocarbon composite polluted farmland soil by the biological surfactant rhamnolipid reinforced blood powder has the characteristics of low cost, easy operation, large-area application, small environment risk and wide application prospect.

Description

technical field [0001] The invention relates to a method for remediating polluted soil, in particular to a method for remediating DDT-polycyclic aromatic hydrocarbon compound polluted soil with a biological agent. Background technique [0002] With the rapid development of my country's social economy and the use of a large number of pesticides and fertilizers in agriculture, a large number of pollutants are discharged into various environmental media, and the pollutants in various environmental media will pass through atmospheric deposition, migration and transformation. Adsorbed in the farmland soil, the farmland soil is polluted, posing a threat to the ecological environment, agricultural safety and the human health of residents, especially the persistent organic pollutants DDT and polycyclic aromatic hydrocarbons are more harmful. DDT has high bioaccumulation and refractory characteristics, resulting in a high residue rate in the soil. These pollutants will continue to acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/10
Inventor 王辉孙丽娜王晓旭张鸿龄陈苏吴昊
Owner SHENYANG UNIV
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