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Method for reinforced combined repairing of polycyclic aromatic hydrocarbon contaminated soil

A technology for polycyclic aromatic hydrocarbons and polluted soil, applied in the field of remediation of polluted soil, can solve the problems of high remediation cost, low remediation efficiency, secondary pollution, etc., and achieve the effect of good remediation effect, no secondary pollution, and environmental friendliness.

Inactive Publication Date: 2017-05-31
SHENYANG UNIV
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Problems solved by technology

The restoration cost of physical restoration and chemical restoration is high and prone to secondary pollution, while the restoration efficiency of biological restoration is low

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0017] Embodiment: field plot experiment

[0018] 1. Field survey, leveling the land. The experimental site is in the facility vegetable shed in Xinchengzi Street, Shenyang City, Liaoning Province. The 0~20cm of the contaminated soil is preset as the repair layer. The soil in the repair layer is fully plowed, and the impurities in the soil are discarded. The bulk density of the investigated soil is 1220kg m -3 , the original concentration of PAHs was 883.85 μg·kg -1 .

[0019] 2. Bacteria activation, preparation of medicines. The high-efficiency degrading bacteria and plant growth-promoting bacteria were stored frozen in the strain storage in the early stage. Before use, the strains must be activated on the plate. After culturing at 30°C for 2 days in the dark, they were inoculated into liquid medium respectively, and the shaker was used at 30 ℃, 120r / min constant temperature shaking culture, regular observation of the bacterial concentration, after 2.6 days, the bacterial ...

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Abstract

The invention discloses a method for reinforced combined repairing of polycyclic aromatic hydrocarbon contaminated soil, and relates to a method for repairing contaminated soil. The method comprises the following processes of field investigation, land leveling, culture activation, medicament preparing and field in-situ repairing operation. In the field in-situ repairing operation, prepared lignin and a prepared rhamnolipid solution are applied into to-be-repaired soil according to the regulated concentration, the soil is sufficiently mixed, 500 mL of plant growth-promoting bacteria liquid and 500 mL of efficient degrading bacteria liquid are evenly sprayed to the to-be-repaired soil every square meter, sufficient uniform mixing is conducted again, and rape seeds are sown; and later management is conducted, quality detection is conducted, the above steps can be repeatedly conducted continuously if polycyclic aromatic hydrocarbon left in the soil does not reach the repairing expectation till the content of the polycyclic aromatic hydrocarbon in the soil reaches the soil environment safety standard. A biology enhancer is applied for activating soil pollutants, plants are induced for enhancing the microbial activity, large-area application can be achieved, environment friendliness is achieved, enrichment of the polycyclic aromatic hydrocarbon through oilseed rapes cannot be promoted, and the application prospect is wide.

Description

technical field [0001] The invention relates to a method for remediating polluted soil, in particular to a method for strengthening joint remediation of polycyclic aromatic hydrocarbon-contaminated soil. Background technique [0002] At present, the potential risks brought by pollutants in farmland soil passing through agricultural products have become a major concern in the field of environmental safety. As the country and the public pay more and more attention to food safety issues, the environment of agricultural product production areas has received more and more attention. Soil is the core medium of the environment, and soil pollution is universal and serious. Therefore, there is an urgent need to develop economical, efficient, and safe practical technologies for mitigation and remediation of combined soil pollution, so as to ensure the safety of the ecological environment of the soil-crop system, and realize clean agricultural production and sustainable use of land res...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 孙丽娜王晓旭刘克斌张超王辉张鸿龄陈苏
Owner SHENYANG UNIV
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