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首页> 外文期刊>Environmental Science & Technology >Elevated Mobility of Persistent Organic Pollutants in the Soil of a Tropical Rainforest
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Elevated Mobility of Persistent Organic Pollutants in the Soil of a Tropical Rainforest

机译：热带雨林土壤中持久性有机污染物的迁移性升高

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摘要

Semivolatile persistent organic pollutants (POP) are bio-accumulative and toxic contaminants. Their global distribution depends on source distribution, atmospheric transport, degradation, and the exchange with ocean and land surfaces. Forests are crucial terrestrial reservoirs due to the commonly envisaged high capacity of their surface soils to store and immobilize airborne contaminants bound to soil organic matter. Our results show that POPs can be unexpectedly mobile in the soil of a tropical rainforest due to fast litter turnover (leading to rapid POP transfer to the subsoil) and leaching rates exceeding degradation rates especially for more hydrophobic congeners. Co-transport in association with leaching fine particulate and dissolved organic matter appears as a relevant driver of this PCB export. A markedly different distribution pattern is displayed in this soil in comparison to soils of colder environments with lower overall storage capacity. These findings show that biogeochemistry of organic matter degradation and weathering can influence POP soil fate. Because tropical forests represent 60% of the global terrestrial productivity, the highlighted dynamics might have an implication for the general distribution of these contaminants.
机译：半挥发性持久性有机污染物（POP）是生物蓄积性和有毒污染物。它们的全球分布取决于源分布，大气传输，退化以及与海洋和陆地表面的交换。森林是至关重要的陆地水库，因为人们普遍认为其表层土壤具有储存和固定与土壤有机物结合的空气传播污染物的高能力。我们的结果表明，由于凋落物的快速周转（导致POP迅速转移到土壤中）和浸出率超过降解率，特别是对于疏水性更高的同类物，POPs可以在热带雨林的土壤中意外地移动。与沥滤细颗粒和溶解的有机物相关的共同运输似乎是这种PCB出口的重要推动力。与较冷环境的土壤相比，这种土壤的总体分配能力明显不同。这些发现表明，有机物降解和风化的生物地球化学可以影响POP土壤的命运。由于热带森林占全球陆地生产力的60％，因此突出显示的动态可能暗示这些污染物的总体分布。

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  • 来源
    《Environmental Science & Technology》 |2015年第7期|4302-4309|共8页
  • 作者

    Qian Zheng; Luca Nizzetto; Xiang Liu; Katrine Borga; Jostein Starrfelt; Jun Li; Yishan Jiang; Xin Liu; Kevin C. Jones; Gan Zhang;

  • 作者单位

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China,Graduate University of the Chinese Academy of Sciences, Beijing 100039, China;

    Norwegian Institute for Water Research, Oslo 0349, Norway,Research Centre for Toxic Compounds in the Environment, Brno 62500, Czech Republic;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    Norwegian Institute for Water Research, Oslo 0349, Norway,Department of Biosciences, University of Oslo, 0316 Oslo, Norway;

    Norwegian Institute for Water Research, Oslo 0349, Norway,Department of Biosciences, University of Oslo, 0316 Oslo, Norway;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United Kingdom;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, 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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