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首页> 外文期刊>Environmental Science & Technology >Triolein Embedded Cellulose Acetate Membrane as a Tool to Evaluate Sequestration of PAHs in Lake Sediment Core at Large Temporal Scale
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Triolein Embedded Cellulose Acetate Membrane as a Tool to Evaluate Sequestration of PAHs in Lake Sediment Core at Large Temporal Scale

机译：三油精嵌入醋酸纤维素膜作为评估大时空湖泊沉积物核心中多环芳烃含量的工具

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摘要

Although numerous studies have addressed sequestration of hydrophobic organic compounds (HOCs) in laboratory, little attention has been paid to its evaluation method in field at large temporal scale. A biomimetic tool, triolein embedded cellulose acetate membrane (TECAM), was therefore tested to evaluate sequestration of six PAHs with various hydrophobicity in a well-dated sediment core sampled from Nanyi Lake, China. Properties of sediment organic matter (OM) varying with aging time dominated the sequestration of PAHs in the sediment core. TECAM- sediment accumulation factors (MSAFs) of the PAHs declined with aging time, and significantly correlated with the corresponding biota-sediment accumulation factors (BSAFs) for gastropod (Bellamya aeruginosa) simultaneously incubated in the same sediment slices. Sequestration rates of the PAHs in the sediment core evaluated by TECAM were much lower than those obtained from laboratory study. The relationship between relative availability for TECAM (MSAF_t/MSAF_0) and aging time followed the first order exponential decay model. MSAF_t/ MSAF_0 was well-related to the minor changes of the properties of OM varying with aging time. Compared with chemical extraction, sequestration reflected by TECAM was much closer to that by B. aeruginosa. In contrast to B. aeruginosa, TECAM could avoid metabolism and the influences from feeding and other behaviors of organisms, and it is much easier to deploy and ready in laboratory. Hence TECAM provides an effective and convenient way to study sequestration of PAHs and probably other HOCs in field at large temporal scale.
机译：尽管许多研究已经解决了在实验室中螯合疏水性有机化合物（HOC）的问题，但在大范围的田间领域对其评估方法的关注却很少。因此，测试了一种仿生工具，即三油精包埋的醋酸纤维素膜（TECAM），以评估从中国南一湖采样的一个良好日期的沉积岩心中六种具有各种疏水性的多环芳烃的螯合。沉积物有机质（OM）的性质随老化时间的变化而变化，这决定了沉积物中PAHs的固存。多环芳烃的TECAM-沉积物积累因子（MSAFs）随老化时间而下降，并且与同时孵化在同一沉积物中的腹足动物（Bellamya aeruginosa）的相应生物沉积物积累因子（BSAFs）显着相关。通过TECAM评估，沉积物中岩心中多环芳烃的螯合速率远低于实验室研究的结果。 TECAM的相对可用性（MSAF_t / MSAF_0）与老化时间之间的关系遵循一阶指数衰减模型。 MSAF_t / MSAF_0与OM属性随老化时间的细微变化密切相关。与化学提取相比，TECAM反映的螯合作用更接近铜绿芽孢杆菌。与铜绿假单胞菌相反，TECAM可以避免新陈代谢以及生物的进食和其他行为的影响，并且在实验室中易于部署和准备。因此，TECAM提供了一种有效且方便的方法，可以在大范围的时间范围内研究多环芳烃的螯合以及可能的其他HOC的螯合。

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  • 来源
    《Environmental Science & Technology》 |2012年第7期|p.3851-3858|共8页
  • 作者

    Yuqiang Tao; Bin Xue; Shuchun Yao; Jiancai Deng; Zhifan Gui;

  • 作者单位

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China;

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China;

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China;

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China;

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, 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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