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首页> 外文期刊>Environmental Science & Technology >Behavior, Fate, and Mass Loading of Short Chain Chlorinated Paraffins in an Advanced Municipal Sewage Treatment Plant
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Behavior, Fate, and Mass Loading of Short Chain Chlorinated Paraffins in an Advanced Municipal Sewage Treatment Plant

机译：先进的城市污水处理厂中短链氯化石蜡的行为，命运和质量负载

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摘要

Sewage treatment plants (STP) are an important source of short chain chlorinated paraffins (SCCPs) to the ambient environment through discharge of effluent and application of sludge. In this work, a field study was conducted to determine the behavior and possible removal of SCCPs during the sewage treatment process in an advanced municipal STP in Beijing, China. SCCPs were detected in all sewage water and sludge samples, and 97% of the initial mass loading in raw sewage was found to be associated with suspended matter. The total concentrations in raw influent, tertiary effluent, and dewatered sludge were 184 ± 19 ng/L, 27 ± 6 ng/L, and 15.6 ± 1.4 μg/g dry weight (d.w.), respectively. The dissolved concentrations of total SCCPs (∑SCCPs) significantly decreased during mechanical, biological, and chemical treatments. SCCP homologue profiles in aqueous phase were distinctly different from those in solid phase. Along the treatment process, the relative abundance of shorter chain and lower chlorinated congeners gradually increased in sewage water, but no obvious variations of homologue profiles were found in sludge. Mass flow analysis indicated, the removal efficiency in aqueous phase for ∑SCCPs was 82.2%, and the congener-specific removal efficiencies were positively related to their solid-water partition coefficients (K_d). Mass balance results indicated that 0.8% and 72.6% of the initial SCCP mass loading were ultimately found in the effluents and dewatered sludge, respectively, while the remaining 26.6% was lost mainly due to biodegradation/biotransformation. It was suggested that the activated sludge system including basic anaerobic-anoxic-aerobic processes played an effective role in removing SCCPs from the wastewater, while the sorption to sludge by hydrophobic interactions was an important fate of SCCPs during the sewage treatment.
机译：污水处理厂（STP）是通过排放废水和施加污泥将短链氯化石蜡（SCCP）排放到周围环境的重要来源。在这项工作中，我们进行了一项现场研究，以确定中国北京某先进的城市污水处理厂在污水处理过程中短链氯化石蜡的行为和可能的去除方法。在所有污水和污泥样品中均检测到短链氯化石蜡，发现原污水中初始质量负荷的97％与悬浮物有关。原始进水，三次污水和脱水污泥中的总浓度分别为干重（d.w.）184±19 ng / L，27±6 ng / L和15.6±1.4μg/ g。在机械，生物和化学处理过程中，总短链氯化石蜡的溶解浓度（∑SCCP）显着降低。水相中的SCCP同系物谱与固相中的显着不同。在整个处理过程中，污水中较短链和较低氯化同类物的相对丰度逐渐增加，但污泥中的同系物轮廓没有明显变化。质量流分析表明，ΣSCCPs在水相中的去除效率为82.2％，同族比去除效率与其固水分配系数（K_d）正相关。质量平衡结果表明，废水和脱水污泥中最终分别发现了SCCP初始质量负荷的0.8％和72.6％，而其余26.6％的损失主要是由于生物降解/生物转化。有人认为，包括基本厌氧-厌氧-好氧过程在内的活性污泥系统在去除废水中的短链氯化石蜡方面发挥了有效作用，而疏水相互作用对污泥的吸附是短链氯化石蜡在污水处理过程中的重要命运。

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  • 来源
    《Environmental Science & Technology》 |2013年第2期|732-740|共9页
  • 作者

    Lixi Zeng; Huijuan Li; Thanh Wang; Yan Gao; Ke Xiao; Yuguo Du; Yawei Wang; Guibin Jiang;

  • 作者单位

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China,SchooI of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China,SchooI of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, 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);
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