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首页> 外文期刊>Environmental Science & Technology >Partitioning and Bioaccumulation of Legacy and Emerging Hydrophobic Organic Chemicals in Mangrove Ecosystems
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Partitioning and Bioaccumulation of Legacy and Emerging Hydrophobic Organic Chemicals in Mangrove Ecosystems

机译：红树林生态系统中旧有和新兴疏水有机化学物质的分区和生物富集

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摘要

Knowledge regarding partitioning behavior and bioaccumulation potential of environmental contaminants is important for ecological and human health risk assessment. While a range of models are available to describe bioaccumulation potential of hydrophobic organic chemicals (HOCs) in temperate aquatic food webs, their applicability to tropical systems still needs to be validated. The present study involved field investigations to assess the occurrence, partitioning, and bioaccumulation behavior of several legacy and emerging HOCs in mangrove ecosystems in Singapore. Concentrations of synthetic musk fragrance compounds, methyl triclosan (MTCS), polychlorinated biphenyls, organo-chlorine pesticides, and polycyclic aromatic hydrocarbons were measured in mangrove sediments, clams, and caged mussels. Freely dissolved concentrations of the HOCs in water were determined using silicone rubber passive samplers. Results showed that polycyclic musks and MTCS are present in mangrove ecosystems and can accumulate in the tissues of mollusks. The generated HOC concentration data for mangrove water, sediments, and biota samples was further utilized to evaluate water sediment partitioning (e.g., K, values) and bioaccumulation behavior (e.g., BAF and BSAF values). Overall, the empirical models fit reasonably well with the data obtained for this ecosystem, supporting the concept that general models are applicable to predict the behavior of legacy and emerging HOCs in mangrove ecosystems.
机译：有关环境污染物的分配行为和生物蓄积潜力的知识对于生态和人类健康风险评估非常重要。尽管可以使用多种模型描述疏水性有机化学物质（HOC）在温带水生食物网中的生物富集潜力，但仍需要验证其在热带地区的适用性。本研究涉及野外调查，以评估新加坡红树林生态系统中几种传统和新兴HOC的发生，分配和生物蓄积行为。在红树林沉积物，蛤和笼养贻贝中测量了合成麝香香料化合物，三氯生（MTCS），多氯联苯，有机氯农药和多环芳烃的浓度。使用硅橡胶无源采样器确定水中HOC的自由溶解浓度​​。结果表明，多环麝香和MTCS存在于红树林生态系统中，并且可以在软体动物的组织中积累。生成的红树林水，沉积物和生物区系样品的HOC浓度数据进一步用于评估水沉积物分配（例如K值）和生物累积行为（例如BAF和BSAF值）。总体而言，经验模型与该生态系统获得的数据相当吻合，支持以下概念：通用模型适用于预测红树林生态系统中的旧式和新兴HOC的行为。

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  • 来源
    《Environmental Science & Technology》 |2019年第5期|2549-2558|共10页
  • 作者

    Bayen Stephane; Estrada Elvagris Segovia; Zhang Hui; Lee Wei Kit; Juhel Guillaume; Smedes Foppe; Kelly Barry C.;

  • 作者单位

    McGill Univ, Dept Food Sci & Agr Chem, 21111 Lakeshore, Ste Anne De Bellevue, PQ H9X 3V9, Canada|Natl Univ Singapore, Singapore Delft Water Alliance, Block E1A 07-03,1 Engn Dr 2, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Geog, 1 Arts Link,AS2 03-01, Singapore 117570, Singapore;

    Natl Univ Singapore, Dept Civil & Environm Engn, Block E1A 07-03,1 Engn Dr 2, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Civil & Environm Engn, Block E1A 07-03,1 Engn Dr 2, Singapore 117576, Singapore;

    Natl Univ Singapore, Trop Marine Sci Inst, 18 Kent Ridge Rd, Singapore 119227, Singapore;

    Deltares, POB 85467, NL-3508 AL Utrecht, Netherlands|Masaryk Univ, Res Ctr Tox Cpds Environm RECETOX, Kamenice 753-5, Brno 62500, Czech Republic;

    Natl Univ Singapore, Dept Civil & Environm Engn, Block E1A 07-03,1 Engn Dr 2, Singapore 117576, Singapore;

  • 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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