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首页> 外文期刊>Environmental Science & Technology >Transformation of Chloroform in Model Treatment Wetlands: From Mass Balance to Microbial Analysis
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Transformation of Chloroform in Model Treatment Wetlands: From Mass Balance to Microbial Analysis

机译：模型处理湿地中氯仿的转化：从质量平衡到微生物分析

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摘要

Chloroform is one of the common disinfection byproducts, which is not susceptible to degradation and poses great health concern. In this study, the chloroform removal efficiencies and contributions of sorption, microbial degradation, plant uptake, and volatilization were evaluated in six model constructed wetlands (CWs). The highest chloroform removal efficiency was achieved in litter-added CWs (99%), followed by planted (46-54%) and implanted CWs (39%). Mass balance study revealed that sorption (73.5-81.2%) and microbial degradation (17.6-26.2%) were the main chloroform removal processes in litter-added CWs, and that sorption (53-6-66.1%) and plant uptake (25.3-36.2%) were the primary contributors to chloroform removal in planted CWs. Around 60% of chloroform got accumulated in the roots after plant uptake, and both transpiration and gas-phase transport were expected to be the drivers for the plant uptake. Sulfate-reducing bacteria and methanogens were found to be the key microorganisms for chloroform biodegradation through cometabolic dechlorination, and positive correlations were observed between functional genes (dsrA, mcrA) and biodegradation rates. Overall, this study suggests that wetland is an efficient ecosystem for sustainable chloroform removal, and that plant and litter can enhance the removal performance through root uptake and microbial degradation stimulation, respectively.
机译：氯仿是常见的消毒副产物之一，不易降解，对健康的关注很大。在这项研究中，在六种模型构建的湿地（CW）中评估了氯仿去除效率以及对吸附，微生物降解，植物吸收和挥发的贡献。添加猫砂的化学废物中氯仿去除效率最高（99％），其次是种植（46-54％）和植入的化学废物（39％）。质量平衡研究表明，吸附（73.5-81.2％）和微生物降解（17.6-26.2％）是添加凋落物的化学废物中主要的氯仿去除过程，吸附（53-6-66.1％）和植物吸收（25.3- 36.2％）是种植的化工厂中氯仿去除的主要贡献者。吸收植物后，约60％的氯仿累积在根部，蒸腾作用和气相传输均被认为是植物吸收的驱动力。硫酸盐还原菌和产甲烷菌被发现是通过新陈代谢进行氯仿生物降解的关键微生物，并且观察到功能基因（dsrA，mcrA）与生物降解速率之间存在正相关。总体而言，这项研究表明，湿地是可持续去除氯仿的有效生态系统，而植物和凋落物可以分别通过根吸收和微生物降解刺激来提高去除性能。

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  • 来源
    《Environmental Science & Technology》 |2015年第10期|6198-6205|共8页
  • 作者

    Yi Chen; Yue Wen; Junwei Zhou; Qi Zhou; Jan Vymazal; Peter Kuschk;

  • 作者单位

    Key Laboratory of Yangtze Water Environment of Ministry of the State Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China,Department of Landscape Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague 16521, Czech Republic,Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research -UFZ, Permoserstrasse 15, 04318 Leipzig, Germany;

    Key Laboratory of Yangtze Water Environment of Ministry of the State Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China;

    Key Laboratory of Yangtze Water Environment of Ministry of the State Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China;

    Key Laboratory of Yangtze Water Environment of Ministry of the State Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China;

    Department of Landscape Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague 16521, Czech Republic;

    Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research -UFZ, Permoserstrasse 15, 04318 Leipzig, Germany;

  • 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);
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