University of Rhode Island Graduate School of Oceanography (URI-GSO), University of Rhode Island Narragansett Bay Campus, 215 South Ferry Road, Narragansett, RI 02882, USA(2).
University of Rhode Island Graduate School of Oceanography (URI-GSO), University of Rhode Island Narragansett Bay Campus, 215 South Ferry Road, Narragansett, RI 02882, USA(2).
Environ Pollut. 2014 Mar;186:172-9. doi: 10.1016/j.envpol.2013.12.002. Epub 2013 Dec 28.
Sediment and polyethylene sampler-based estimates of polychlorinated dibenzo-p-dioxin/dibenzofuran (PCDD/F) concentrations in Newark Bay, New Jersey (USA) benthic biota were compared. Biota concentrations based on sediment were estimated using an organic carbon (OC)-water partitioning model and an OC and black carbon (BC)-water dual model. Biota concentrations based on polyethylene were estimated from samplers deployed in the Newark Bay water column and samplers immersed in a sediment/porewater slurry in the laboratory. Porewater samplers provided the best estimates of biota concentrations (within 3.1×), with best results achieved for deposit-feeders (within 1.6×). Polyethylene deployed in deep water also provided good estimates of biota concentrations (within 4×). By contrast, OC-water partitioning overestimated biota concentrations by up to 7×, while OC and BC combined underestimated biota concentrations by up to 13×. We recommend passive samplers such as polyethylene for estimating concentrations of hydrophobic organic contaminants in field biota given its simplicity and relatively lower uncertainty compared to sediment equilibrium partitioning.
本研究比较了基于沉积物和聚乙烯采样器的新泽西海岸底生物多氯二苯并对二恶英/二苯并呋喃（PCDD/F）浓度的估算。基于沉积物的生物浓度采用有机碳（OC）-水分配模型和 OC 和黑碳（BC）-水双模型进行估算。基于聚乙烯的生物浓度是根据部署在纽瓦克湾水柱中的采样器和在实验室中浸入沉积物/孔隙水浆中的采样器来估算的。孔隙水采样器提供了生物浓度的最佳估算值（在 3.1 倍以内），对于沉积物摄食者（在 1.6 倍以内）取得了最佳效果。在深水中部署的聚乙烯也能很好地估算生物浓度（在 4 倍以内）。相比之下，OC-水分配模型高估了生物浓度，最高可达 7 倍，而 OC 和 BC 联合模型则低估了生物浓度，最高可达 13 倍。鉴于其简单性和相对较低的不确定性，我们建议在现场生物中使用聚乙烯等被动采样器来估算疏水性有机污染物的浓度，而不是采用沉积物平衡分配法。
