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首页> 外文期刊>Environmental Science & Technology >Does Equilibrium Passive Sampling Reflect Actual in Situ Bioaccumulation of PAHs and Petroleum Hydrocarbon Mixtures in Aquatic Worms?
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Does Equilibrium Passive Sampling Reflect Actual in Situ Bioaccumulation of PAHs and Petroleum Hydrocarbon Mixtures in Aquatic Worms?

机译：平衡被动采样是否反映了水生蠕虫中PAHs和石油烃混合物的实际原位生物积累？

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Over the past couple of years, several analytical methods have been developed for assessing the bioavailability of environmental contaminants in sediments and soils. Comparison studies suggest that equilibrium passive sampling methods generally provide the better estimates of internal concentrations in organisms and thus of subsequent risks. However, field studies to validate the potential of passive sampling to predict actual in situ bioaccumulation are scarce and limited information only exists on selected, individual compounds. The present study investigated whether bioaccumulation of PAH and complex petroleum hydrocarbon mixtures in field-exposed aquatic worms could be predicted properly with passive samplers. To this end, in situ bioaccumulation in aquatic worms at 6 PAH-conlaminated locations and 8 petroleum hydrocarbon (otl)-contaminated locations was compared with the results of in situ solid phase micro extraction (SPME) applications. For the oil-contaminated sediments, bioaccumulation was also assessed in the lab with polyoxymethylene solid phase extraction (POM-SPE). Actual PAH bioaccumulation was generally predicted within a factor of 4 with in situ SPME, using temperature-adjusted SPME fiber-water partition coefficients and lab-derived bioaccumulation factors (BAFs) for the worm species used, demonstrating the method's potential under field conditions. In situ SPME appeared to be less suitable for predicting bioaccumulation of oil however, in contrast to POM-SPE in the lab, which assessed in situ oil bioaccumulation within a factor of 3, while also closely reflecting the actual distribution of oil boiling point fractions (the hydrocarbon block profile) as accumulated by the worms. All in all, the results indicated that (specific) equilibrium passive samplers, either applied in the field or the lab, have great potential for assessing bioaccumulation of environmental contaminant mixtures from field-contaminated sediments.
机译：在过去的几年中，已经开发了几种分析方法来评估沉积物和土壤中环境污染物的生物利用度。比较研究表明，平衡的被动采样方法通常可以更好地估计生物体内的内部浓度，从而可以更好地估计后续风险。但是，用于验证被动采样潜力以预测实际原位生物富集的田间研究很少，而且仅关于选定的单个化合物的信息有限。本研究调查了通过被动采样器能否正确预测田间暴露水生蠕虫中PAH和复杂石油烃混合物的生物富集。为此，将水生蠕虫在6个PAH污染位置和8个石油烃（otl）污染位置的原位生物富集与原位固相微萃取（SPME）应用的结果进行了比较。对于受油污染的沉积物，还通过实验室中的聚甲醛固相萃取（POM-SPE）评估了生物积累。使用温度调节后的SPME纤维-水分配系数和实验室得出的蠕虫物种生物积累因子（BAF），通常使用原位SPME预测实际PAH的生物积累在4倍以内，证明了该方法在田间条件下的潜力。然而，与实验室中的POM-SPE相比，原位SPME似乎不太适合预测石油的生物蓄积，后者在3倍的范围内评估了原地石油的生物蓄积，同时也密切反映了油沸点馏分的实际分布（蠕虫积累的碳氢化合物块剖面）。总而言之，结果表明，无论是在现场还是在实验室中使用的（特定）平衡无源采样器都具有巨大的潜力，可以评估来自现场污染沉积物的环境污染物混合物的生物蓄积性。

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  • 来源
    《Environmental Science & Technology》 |2012年第2期|p.937-944|共8页
  • 作者

    Barry Muijs; Michiel T. O. Jonker;

  • 作者单位

    Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80177, 3508 TD Utrecht, The Netherlands;

    Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80177, 3508 TD Utrecht, The Netherlands;

  • 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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