Biodegradation of beta-cypermethrin by two Serratia spp. with different cell surface hydrophobicity

文献类型： 外文期刊

第一作者： Wang, Shenghui

作者： Wang, Shenghui;Qu, Jie;Li, Kang;Xu, Lili;Shi, Yanhua;Yan, Yanchun;Zhang, Chen;Jia, Le

作者机构：

关键词： Beta-cypermethrin;Serratia sp.;Degradation;Cell surface hydrophobicity

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Serratia spp. strain JC1 and JCN13, isolated from activated sludge, could degrade and utilize beta-cypermethrin (beta-CP) as the sole carbon and energy sources for growth in the minimal salt media (MSM). The two strains could effectively degrade beta-CP with total inocula biomass 0.1-0.3 g dry wt L-1, at 20-38 degrees C, pH 6-9, initial beta-CP 25-1000 mg L-1 and metabolize it by cleavage of ester and diphenyl ether to yield 3-phenoxybenzoic acid (3-PBA) and phenol, then completely mineralize it. Response surface methodology (RSM) was used to optimize degradation conditions. Under their own optimal degradation conditions, strain JC1 could degrade 92% beta-CP within 10 days and the degradation rate of strain JCN13 reached 89% within 4 days. Cell surface hydrophobicity (CSH) and biodegradation assays indicated that JCN13 has higher hydrophobicity and degradation ability than JC1, and it means the high hydrophobicity of strains Could enhance the degradation of beta-CP. (C) 2010 Elsevier Ltd. All rights reserved.

分类号： Q

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