Effects of Surfactants on Deltamethrin Degradation by Acinetobacter junii LH-1-1

doi:10.13560/j.cnki.biotech.bull.1985.2020-0674

Abstract

Abstract:

It is aimed to investigate the effects of surfactants on the degradation of deltamethrin（DM）by strain. The previous screened Acinetobacter junii strain LH-1-1,which has a high degradability on DM,was selected as target strain. The critical micelle concentration（CMC）of three different types of surfactants（CTAB,AES,and Tween-20）werefirst determined by fluorescence spectrometry,and then the effects of the CMCs of CTAB,AES,and Tween-20 on the strain’s growth,and solubility and degradation of DM by the strain were investigated. The CMC of CTAB,AES,and Tween-20 was 0.793 mmol/L,0.547 mmol/L,and 0.031 mmol/L,respectively. The results showed that the strain growth was not significantly affected by using CTAB,while inhibited by AES,and Tween-20 had a certain promotion on the strain’s growth. The solubility of DM was significantly improved by using CTAB,AES and Tween-20. The degradation rate of DM was significantly enhanced by A. junii LH-1-1 in the presence of CTAB. When the concentration of CTAB was 2 CMC,the degradation rate of DM was 98.20% within 72 h,which was 24.31% higher than the positive control group（without the addition of surfactants）. The cationic surfactant CTAB may significantly improve the degradation of DM by A. junii LH-1-1.

Key words: surfactant, Acinetobacter junii LH-1-1, deltamethrin, biodegradation

WU Min, TANG Jie, HU Qiong, LEI Dan, ZHANG Qing. Effects of Surfactants on Deltamethrin Degradation by Acinetobacter junii LH-1-1[J]. Biotechnology Bulletin, 2021, 37(1): 215-222.

Figures/Tables 5

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