A microbial remediation method suitable for cyfluthrin pollution in marine environment

Abstract

The invention discloses a microbial remediation method suitable for marine environment polluted by cyfluthrin, which is characterized in that it comprises the following steps: (1) Screening and acclimating to obtain a highly efficient cyfluthrin-degrading bacterium, the bacterium is Nbuzhang1 strain, and the classification name is Gangua Photobacteria; (2) Using the reverse microemulsion polymerization method to obtain a molecularly imprinted-quantum dot nanostructure polymer with specific recognition properties for bifluthrin; (3) Adding highly efficient cyfluthrin-degrading bacteria to the molecularly imprinted cyfluthrin ‑Quantum dot nanostructure polymers, adsorb and fix microorganisms to form immobilized microorganisms; (4) add immobilized microorganisms to an appropriate amount of polluted seawater, adjust the pH value of polluted seawater to 7‑8, and stand still for 2 hours. The advantage is that it has better Hydrophilicity, biocompatibility and high adsorption capacity allow for the selective adsorption of cyfluthrin from the culture environment.

Description

technical field [0001] The invention relates to the technical field of marine environment treatment, in particular to a microbial remediation method suitable for cyfluthrin pollution in the marine environment. Background technique [0002] Pyrethroid pesticides were once considered to have the advantages of high efficiency, low toxicity, and safe use, and could be used as substitutes for organochlorine and organophosphorus pesticides. However, recent studies have shown that such pesticides are accumulative, and long-term exposure can easily lead to chronic diseases. Carcinogenic, teratogenic, mutagenic risks. At the same time, due to the strong lipophilicity of this type of pesticide, it is highly toxic to aquatic organisms such as fish and shellfish. In particular, toxic substances with endocrine disrupting properties such as bifluthrin have an activity similar to biological hormones, and a very small amount of residue can cause toxicity to the endocrine system of organism...

AI Technical Summary

Problems solved by technology

[0003] Immobilized microbial treatment technology can exert the carrier's adsorption and enrichment effect on trace pollutants, and increase the substrate concentration required for microbial degradation. However, commonly used immobilized carriers such as activated carbon and carbon nanotubes are non-specific, especially It is the existence of complex matrix in the environment that reduces the adsorption effect of trace pollutants