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首页> 外文期刊>Environmental Science & Technology >Environmental Occurrence and Distribution of Short Chain Chlorinated Paraffins in Sediments and Soils from the Liaohe River Basin, P. R. China
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Environmental Occurrence and Distribution of Short Chain Chlorinated Paraffins in Sediments and Soils from the Liaohe River Basin, P. R. China

机译：中国辽河流域沉积物和土壤中短链氯化石蜡的环境发生与分布

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摘要

Chlorinated paraffins (CPs) are industrially produced in large quantities in the Liaohe River Basin. Their discharge inevitably causes environmental contamination. However, very limited information is available on their environmental levels and distributions in this typical industrial region. In this study, short chain CPs (SCCPs) were analyzed in sediments, paddy soils, and upland soils from the Liaohe River Basin, with concentrations ranging from 39.8 to 480.3 ng/g dry weight. A decreasing trend in SCCP concentrations was found with increasing distance from the cities, suggesting that local industrial activity was the major source of SCCP contamination. A preliminary sediment inventory of SCCPs indicated approximately 30.82 tonnes of SCCPs residual in the sediments from the Liaohe River. The average discharge of SCCPs was estimated to be about 74.4 mg/tonne industrial wastewater. The congener group profiles showed that the relative abundances of shorter chain and lower chlorinated CP congeners (C_(10)-CPs with 5 or 6 chlorine atoms) in soils in rural areas were higher than in sites near cities, which demonstrated that long-range atmospheric transportation could be the major transport pathway. Environmental degradation of SCCPs might occur, where higher chlorinated congeners could dechlorinate to form the lower chlorinated congeners.
机译：辽河流域大量生产氯化石蜡（CPs）。它们的排放不可避免地会造成环境污染。但是，在这个典型的工业地区，关于其环境水平和分布的信息非常有限。在这项研究中，分析了辽河流域沉积物，水稻土和旱地土壤中的短链CPs（SCCPs），其浓度范围为干重39.8至480.3 ng / g。随着距城市距离的增加，短链氯化石蜡浓度呈下降趋势，这表明本地工业活动是短链氯化石蜡污染的主要来源。短链氯化石蜡的初步沉积物清单显示，辽河沉积物中残留了约30.82吨短链氯化石蜡。短链氯化石蜡的平均排放量估计为约74.4毫克/吨工业废水。同族群分布图表明，农村土壤中短链和较低氯代CP同类物（具有5或6个氯原子的C_（10）-CPs）的相对丰度高于城市附近的地点，表明长期大气运输可能是主要的运输途径。短链氯化石蜡可能会在环境中降解，较高的氯化同类物可能会脱氯而形成较低的氯化同类物。

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  • 来源
    《Environmental Science & Technology》 |2012年第7期|p.3771-3778|共8页
  • 作者

    Yuan Gao; Haijun Zhang; Fan Su; Yuzeng Tian; Jiping Chen;

  • 作者单位

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China;

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China;

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China;

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China;

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of 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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