A method for remediating estradiol in soil based on immobilized microorganism technology

Abstract

The invention relates to a method for remediation of estradiol in soil on basis of the immobilized microbial technology, relates to a method for soil remediation. The method comprises the following steps: mixing pyrophyllite, decorticated cottonseed meal and pine needle according to the weight part ratio of pyrophyllite to decorticated cottonseed meal to pine needle being 4:1:1 to obtain a microbial immobilized carrier material, sterilizing, inoculating a bacterium suspension which accounts for 2-5% of the total weight of the carrier, additionally adding an enrichment medium according to the dosage of 1.5 ml of enrichment medium for 1 g of the carrier each day to obtain immobilized microbial granules, and determining a proper feed ratio of the prepared immobilized microbial granules according to the weight of soil, so as to be used for remediation of estradiol contaminated soil. According to the method for remediation of estradiol in soil on basis of the immobilized microbial technology, provided by the invention, estradiol in soil is degraded by utilizing the immobilized microbial technology, and the degradation effect of estradiol under different environment temperatures, pH values and soil moisture contents and other soil environment conditions can be examined.

Description

technical field

[0001] The invention relates to a method for repairing soil, in particular to a method for repairing estradiol in soil based on immobilized microorganism technology. Background technique

[0002] Environmental Estrogens (Environmental Estrogens) are a kind of biological organisms to maintain normal dynamic balance, Environmental chemicals (exogenous substances) that adversely affect reproduction, growth, and behavior are also known as Endocrine Disrupting Chemicals (EDCs).

[0003] Human and animal excreta are the main source of estradiol in the natural environment. In order to promote the growth of livestock and poultry and shorten the breeding cycle, some farms add a large amount of growth hormones to the feed. These hormones will be discharged into the environment along with the manure of livestock and poultry. After fertilization, they will not only accumulate in crops, but also With the rainfall and irrigation process, it enters the soil and even the g...

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