Method of increasing gesarex polluted soil phyto remediation efficiency

A technology for contaminated soil and phytoremediation, which is applied in the field of contaminated ecological restoration and can solve problems such as affecting the efficiency of soil restoration.

Inactive Publication Date: 2008-07-30
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

Although the promotion of mycorrhizal root development and root exudation, as well as the change of plant root morphology will increase the bioavailability of organic pollutants in the soil and the ability of plants to absorb or

Method used

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  • Method of increasing gesarex polluted soil phyto remediation efficiency
  • Method of increasing gesarex polluted soil phyto remediation efficiency
  • Method of increasing gesarex polluted soil phyto remediation efficiency

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Embodiment Construction

[0023] In the following, the present invention will be described in further detail in combination with specific embodiments.

[0024] First pass the soil through a 2mm sieve and the river sand through a 1-2mm sieve, mix them according to the weight of 1:1, and sterilize them with 10kGy irradiation to kill the fungal hyphae and fungal spores in the soil, and mix them into the base fertilizer. Base fertilizer: N, 60mg kg -1 ; P, 30 mg kg -1 ; K, 67 mg kg -1 , and other trace elements. The experiment was designed to deal with 4 DDT concentrations, the concentrations were 0, 2.5, 5, 10mg kg -1 . First dissolve the required amount of DDT with n-hexane, add it to a small part of the test soil, and after the n-hexane is completely volatilized (1~2d), mix it into all the test soil step by step, stir well, weigh and load Put it into pots and pots, and fill each pot with 650g of soil. The experiment involved three treatments: no inoculation, inoculation, inoculation and addition o...

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Abstract

The invention provides a method for improving the plant-based recovery efficiency of dichlorodiphenyl trichloroethane (DDT)-polluted soil. The method is to promote mycorrhiza of clover and add chemical surfactant to recover the DDT-polluted soil with the joint function of uromyces striatus schroter and the surfactant. The steps of the method include that an inoculant layer is inoculated in a culture medium; mycorrhiza is carried out to the clover and that the sprouted clover is planted in the DDT-polluted soil and the surfactant TritonX-100 is added to the soil. The joint effect of the mycorrhiza and the surfactant can remarkably improve the resistance of plants to the DDT, reduce the concentration of the DDT in the soil and have evident plant-based recovery efficiency of the DDT-polluted soil. The method of the invention can be used for reference for the recovery of the soil polluted by other organic matters.

Description

technical field [0001] The invention relates to pollution ecological restoration technology, in particular to a phytoremediation method for DDT-contaminated soil through the combined action of mycorrhizae and surfactants. Background technique [0002] The pesticide DDT and its metabolites are typical persistent pollutants (POPs). Due to its persistence and potential threat to human health, it has attracted more and more attention. The DDT remaining in the soil not only affects the normal function of the soil and reduces the quality of the soil environment, but also can enter the food chain through bioaccumulation and endanger human health. Therefore, the removal of DDT in soil and the remediation of polluted soil have become an important research topic in the field of soil environment research. [0003] Phytoremediation is a way to repair soil by using the growth of plants to absorb, transform and transfer pollutants, and to promote the degradation and mineralization of po...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/08C12N1/14C09K17/00C05G1/00
Inventor 张淑贞武耐英黄红林
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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