[Advances in transformation and regulation biodegradation of chorinated hydrocarbons in landfill].

微生物学报 Pub Date : 2017-04-04
Xu Yang, Zhilin Xing, Lijie Zhang
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Abstract

Understanding the biotransformation mechanism of chlorinated hydrocarbons in contaminated site is of great significance to the in-situ bioremediation. Therefore, we summed up the overlapping composition of chlorinated hydrocarbons and analyzed statistically the concentration variations and degradation rate of chlorinated hydrocarbons in various landfill which were regarded as one of the most typical compound pollution sites. The statistical data indicated that chloralkane and chloroalkene concentration ranged 0.20 to 32.45 and 0.50 to 32.45 μg/m3, respectively, which were the main components. We also found that biodegradation rates of chlorinated hydrocarbons decreased with the number of attached chlorine atoms in landfill cover. Then, we summarized the biodegradation mechanism of chlorinated hydrocarbons under different environmental conditions. The results implied that chlorinated hydrocarbons biodegradation incorporated aerobic co-metabolism, halorespiration and anaerobic reductive dechlorination involved in a wide range of substrates and a variety of functional microbes. Based on of these analyses, we constructed biodegradation models of chlorinated hydrocarbons in landfill cover. Finally, the possible development of chlorinated hydrocarbons biological removal in the future was predicated.

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垃圾填埋场中氯代烃转化与调控生物降解研究进展[j]。
了解氯代烃在污染场地中的生物转化机理对现场生物修复具有重要意义。因此,我们总结了氯代烃的重叠组成,并统计分析了各填埋场氯代烃的浓度变化和降解率,认为这是最典型的复合污染场所之一。统计数据表明,氯烷和氯烯烃浓度分别为0.20 ~ 32.45和0.50 ~ 32.45 μg/m3,是主要成分。我们还发现,随着垃圾填埋场覆盖层中附着氯原子的数量增加,氯代烃的生物降解率降低。然后总结了不同环境条件下氯代烃的生物降解机理。结果表明,氯化烃的生物降解包括好氧共代谢、盐呼吸和厌氧还原脱氯,涉及广泛的底物和多种功能微生物。在此基础上,建立了填埋场覆盖层中氯代烃的生物降解模型。最后,展望了氯代烃生物去除技术的发展前景。
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期刊介绍: Acta Microbiologica Sinica(AMS) is a peer-reviewed monthly (one volume per year)international journal,founded in 1953.It covers a wide range of topics in the areas of general and applied microbiology.The journal publishes original papers,reviews in microbiological science,and short communications describing unusual observations. Acta Microbiologica Sinica has been indexed in Index Copernicus (IC),Chemical Abstract (CA),Excerpt Medica Database (EMBASE),AJ of Viniti (Russia),Biological Abstracts (BA),Chinese Science Citation Database (CSCD),China National Knowledge Infrastructure(CNKI),Institute of Scientific and Technical Information of China(ISTIC),Chinese Journal Citation Report(CJCR),Chinese Biological Abstracts,Chinese Pharmaceutical Abstracts,Chinese Medical Abstracts and Chinese Science Abstracts.
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