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首页> 外文期刊>Science of the total environment >Silicone rubber passive samplers for measuring pore water and exchangeable concentrations of polycyclic aromatic hydrocarbons concentrations in sediments
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Silicone rubber passive samplers for measuring pore water and exchangeable concentrations of polycyclic aromatic hydrocarbons concentrations in sediments

机译：硅橡胶无源采样器，用于测量孔隙水和沉积物中多环芳烃浓度的可交换浓度

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摘要

The use of a silicone rubber passive sampler for the assessment of the availability of lipophilic organic contaminants in sediments is described. The passive sampler accumulated polycyclic aromatic hydrocarbons (PAHs) from sediments with an equilibration time of 20 days for most PAHs. The method was used to measure the free dissolved concentrations in pore water of 30 PAHs (parent and alkylated), their water exchangeable concentrations and sediment-water partition coefficients in field sediments from a Scottish sea loch that supports fish farming. Fluoranthene and pyrene dominated the PAH concentration composition in the pore waters. The water exchangeable concentration reflected the pyrogenic pollution pattern found in the sediments and indicated that a proportion of the PAHs were not available for exchange with the aqueous phase. Strong linear relationships between organic carbon normalised sediment-water partition coefficients (logK_(oc)) and corresponding octanol-water partition coefficients of PAHs were obtained. The logK_(oc) values obtained are on average, 0.6 log units higher than literature values commonly used in sediment risk assessments, consequently direct measurements of logK_(oc) in field sediments should be used to improve the reliability of risk assessments.
机译：描述了使用硅橡胶无源采样器评估沉积物中亲脂性有机污染物的可用性。被动采样器从沉积物中积累了多环芳烃（PAH），大多数PAH的平衡时间为20天。该方法用于测量30种PAH（母体和烷基化的PAH）在孔隙水中的自由溶解浓度​​，它们的水交换浓度以及来自支持鱼类养殖的苏格兰海域的田间沉积物中的沉积物水分配系数。荧蒽和pyr在孔隙水中占主导地位。可交换水的浓度反映了沉积物中发现的热源污染模式，表明一部分PAHs无法与水相交换。获得了有机碳归一化沉积物-水分配系数（logK_（oc））与多环芳烃的相应辛醇-水分配系数之间的强线性关系。平均获得的logK_（oc）值比沉积物风险评估中常用的文献值高0.6 log个单位，因此，应使用直接测量田间沉积物中logK_（oc）的值来提高风险评估的可靠性。

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  • 来源
    《Science of the total environment》 |2013年第1期|988-996|共9页
  • 作者

    Kyari Yates; Pat Pollard; Ian Davies; Lynda Webster; Colin Moffat;

  • 作者单位

    School of Pharmacy & Life Sciences, Robert Gordon University, Aberdeen AB25 1HG, UK;

    School of Pharmacy & Life Sciences, Robert Gordon University, Aberdeen AB25 1HG, UK;

    Marine Scotland Science Marine Laboratory, 375 Victoria Road, Aberdeen AB11 9DB, UK;

    Marine Scotland Science Marine Laboratory, 375 Victoria Road, Aberdeen AB11 9DB, UK;

    Marine Scotland Science Marine Laboratory, 375 Victoria Road, Aberdeen AB11 9DB, UK,School of Pharmacy & Life Sciences, Robert Gordon University, Aberdeen AB25 1HG, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Silicone rubber; Passive samplers; PAHs; Partition coefficients; Sediments; Bioavailability;

    机译：硅橡胶;无源采样器;多环芳烃;分配系数;沉积物;生物利用度;

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