Passive sampling has emerged as a promising tool to assess the presence of hydrophobic organic contaminants (HOC) in water, sediment, and biota, such as polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) or polychlorinated biphenyls (PCBs). Previous work evaluated the ability of passive samplers to predict the bioavailability of sedimentary HOCs mostly in the laboratory, often for marine organisms. The present study assessed the use of low-density polyethylene (LDPE) to derive freely dissolved concentrations of PCDD/Fs and PCBs in porewater in situ versus ex situ and in river water. An LDPE-based multisampler system was deployed at 4 locations along the lower Passaic River (NJ, USA) in sediment and the water column, where sediment and benthic species samples were also collected. Good agreement was generally observed for PCDD/F and PCB concentrations comparing in situ and ex situ approaches (within 0.30-39%). Significant linear relationships were derived between log LDPE-based and log lipid-based concentrations of PCDD/Fs and PCBs. The in situ multisampler system showed promise to derive HOC concentrations in porewater and river water and to predict the bioaccumulation potential of HOCs in benthic biota. Environ Toxicol Chem 2020;39:1174-1185. © 2020 SETAC.

中文翻译：

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基于原位被动采样评估下Passaic河（美国新泽西州）中多氯二恶英/呋喃和多氯联苯的底栖生物富集。

被动采样已成为评估水，沉积物和生物区系中疏水有机污染物（HOC）的存在的有前途的工具，例如多氯联苯对二恶英/呋喃（PCDD / Fs）或多氯联苯（PCBs）。先前的工作评估了被动采样器预测沉积HOC的生物利用度的能力，主要是在实验室中，通常是海洋生物。本研究评估了使用低密度聚乙烯（LDPE）得出原位与异位和河水中孔隙水中PCDD / Fs和PCBs的自由溶解浓度​​。基于LDPE的多重采样器系统在沉积物和水柱中的Passaic河下游（美国新泽西州）的4个位置部署，还收集了沉积物和底栖生物样品。通常比较原位和异位方法（在0.30-39％之内）的PCDD / F和PCB浓度具有良好的一致性。在基于对数LDPE的对数和基于对数脂质的PCDD / F和PCB浓度之间得出了显着的线性关系。原位多采样器系统显示出可以推导孔隙水和河水中HOC浓度并预测底栖生物群中HOC的生物富集潜力的希望。Environ Toxicol Chem 2020; 39：1174-1185。©2020 SETAC。Environ Toxicol Chem 2020; 39：1174-1185。©2020 SETAC。Environ Toxicol Chem 2020; 39：1174-1185。©2020 SETAC。