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首页> 外文期刊>Journal of Hazardous Materials >Characterization of a bacterial strain capable of degrading DDT congeners and its use in bioremediation of contaminated soil
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Characterization of a bacterial strain capable of degrading DDT congeners and its use in bioremediation of contaminated soil

机译：能够降解DDT同类物的细菌菌株的表征及其在污染土壤的生物修复中的应用

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摘要

A bacterial strain DDT-6 (D6) capable of utilizing dichlorodiphenyltrichloroethane (DDT), clichlorodiphenyldichloroethane (DDD), and dichlorodiphenyldichloroethylene (DDE) (DDTs) as its sole carbon and energy source was isolated and identified as Sphingobacterium sp. The degradation of DDTs by strain D6 in mineral salt medium and in field soil was investigated. The half-lives of the degradation of DDTs increased with increasing concentration ranging from 1 to 50mgL~(-1). Favorable degradation conditions for DDTs by strain D6 were found to be pH 7.0 and 30 C. The degradation of DDTs by strain D6 was found to be statistically significantly enhanced (p<0.05) by the addition of glucose. Based on the metabolites detected, a pathway was proposed for DDT degradation in which it undergoes dechlorination, hydrogenation, dioxygenation, decarboxylation. hydroxylation, and phenyl ring-cleavage reactions to complete the mineralization process. The addition of strain D6 into the contaminated soils was found to statistically significantly enhance (p<0.05) the degradation of DDTs. The results indicate that the isolate D6 can be used successfully for the removal or detoxification of residues of DDTs in contaminated soil.
机译：分离出能够利用二氯二苯基三氯乙烷（DDT），二氯二苯基二氯乙烷（DDD）和二氯二苯基二氯乙烯（DDT）（DDTs）作为唯一碳源和能源的细菌菌株DDT-6（D6），并将其鉴定为Sphingobacterium sp。研究了D6菌株在矿物盐培养基和田间土壤中对滴滴涕的降解作用。滴滴涕降解的半衰期随着浓度的增加而增加，范围从1至50mgL〜（-1）。发现菌株D6对DDT的有利降解条件是pH 7.0和30℃。发现菌株D6对DDT的降解通过添加葡萄糖在统计学上显着增强（p ＜0.05）。根据检测到的代谢物，提出了一种DDT降解途径，其中该途径经历了脱氯，氢化，双加氧和脱羧作用。羟基化和苯环裂解反应完成矿化过程。发现在受污染的土壤中添加D6菌株在统计学上显着增强了DDT的降解（p <0.05）。结果表明，分离物D6可以成功用于去除或去除受污染土壤中DDT的残留。

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  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|p.281-289|共9页
  • 作者

    Hua Fang; Bin Dong; Hu Yan; Feifan Tang; Yunlong Yu;

  • 作者单位

    Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, PR China;

    Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, PR China;

    Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, PR China;

    Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, PR China;

    Department of Plant Protection, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310029, Zhejiang, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DDT; sphingobacterium sp.; bioremediation; soil; pathway;

    机译：滴滴涕;鞘脂杆菌属;生物修复;泥;通路;

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