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首页> 外文期刊>Chemosphere >Testing of various membranes for use in a novel sediment porewater isolation chamber for infaunal invertebrate exposure to PCBs
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Testing of various membranes for use in a novel sediment porewater isolation chamber for infaunal invertebrate exposure to PCBs

机译：测试用于新型无脊椎动物无脊椎动物暴露于PCB的新型沉积物孔隙水隔离室中使用的各种膜

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摘要

In benthic sediment bioassays, determining the relative contribution to exposure by contaminants in overlying water, porewater, and sediment particles is technically challenging. The purpose of the present study was to assess the potential for membranes to be utilized as a mechanism to allow freely dissolved hydrophobic organic contaminants into a pathway isolation exposure chamber (PIC) while excluding all sediment particles and dissolved organic carbon (DOC). This investigation was conducted in support of a larger effort to assess contaminant exposure pathways to benthos. While multiple passive samplers exist for estimating concentrations of contaminants in porewater such as those using solid-phase micro extraction (SPME) and polyoxymethylene (POM), techniques to effectively isolate whole organism exposure to porewater within a sediment system are not available. We tested the use of four membranes of different pore sizes (0.1-1.2 μm) including nylon, polycarbonate, polyethylsulfone, and polytetrafluo-roethylene with a hydrophilic coating. Exposures included both diffusion of radiolabeled and non-labeled contaminants across membranes from aqueous, sediment slurry, and whole sediment sources to assess and evaluate the best candidate membrane. Data generated from the present study was utilized to select the most suitable membrane for use in the larger bioavailability project which sought to assess the relevance of functional ecology in bioavailability of contaminated sediments at remediation sites. The polytetrafluoroethylene membrane was selected for use in the PIC, although exclusion of dissolved organic carbon was not achieved.
机译：在底栖生物测定中，确定上层水，孔隙水和沉积物颗粒中污染物对暴露的相对贡献在技术上具有挑战性。本研究的目的是评估将膜用作允许自由溶解的疏水有机污染物进入通路隔离暴露室（PIC）的机制，同时排除所有沉积物颗粒和溶解的有机碳（DOC）的潜力。进行这项研究是为了支持更大的努力来评估污染物接触底栖生物的途径。尽管存在多个用于估计孔隙水中污染物浓度的无源采样器，例如使用固相微萃取（SPME）和聚甲醛（POM）的那些采样器，但尚无有效分离整个生物体在沉积物系统中暴露于孔隙水中的技术。我们测试了四种具有不同孔径（0.1-1.2μm）的膜的使用，包括尼龙，聚碳酸酯，聚乙砜和带有亲水涂层的聚四氟乙烯。暴露包括放射性标记和非标记污染物从水，沉积物浆液和整个沉积物源跨膜扩散，以评估和评估最佳候选膜。从本研究中获得的数据用于选择最合适的膜，以用于较大的生物利用度项目，该项目旨在评估功能性生态学对修复地点受污染沉积物生物利用度的相关性。选择了聚四氟乙烯膜用于PIC，尽管没有排除溶解的有机碳。

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  • 来源
    《Chemosphere》 |2014年第7期|65-69|共5页
  • 作者

    Jessica G. Coleman; Guilherme R. Lotufo; Alan J. Kennedy; Aimee R. Poda; Todd S. Rushing; Carlos E. Ruiz; Todd S. Bridges;

  • 作者单位

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Ceotechnical Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

    U.S. Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sediment; Porewater; Diffusion; Membrane; Bioavailability; Benthic;

    机译：沉淀;孔隙水;扩散;膜;生物利用度;本蒂奇;

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