Environmental monitoring of hydrophobic organic contaminants: The case of mussels versus semipermeable membrane devices
Environmental monitoring of hydrophobic organic contaminants: The case of mussels versus semipermeable membrane devices
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DOI：
10.1021/es052492r
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发表时间：
2006-06-15
影响因子：
11.4
通讯作者：
Honkoop, Pieter J. C.
中科院分区：
文献类型：
--
作者：
Booij, Kees;Smedes, Foppe;Honkoop, Pieter J. C.
在贻贝和半透膜装置（SPMDs）的疏水化学品的浓度在过去十年中发表的9项研究，修正了新的数据在斯凯尔特北海地区，进行了评估，以了解这些采样矩阵之间的相似性和差异。建立了一个模型来描述的浓度比，使用文献值的消除速率常数和稳态积累因子的两个采样器作为关键参数。该模型可以成功地描述七项研究的结果。这些研究中浓度比率的差异与贻贝生物累积因子（BAF）和SPMD水采样率的变异性有关。对于两项研究，模型只能通过采用不切实际的高水采样率来描述数据，而对于一项研究，没有足够的数据来测试模型。我们认为，SPMDs一般会产生更可靠的估计暴露浓度比贻贝，因为在原位BAF值是难以估计的，而在原位交换动力学的SPMDs可以量化的性能参考化合物的耗散率测量。未来和现有的监测方案的结果的影响进行了讨论。
Concentrations of hydrophobic chemicals in mussels and semipermeable membrane devices ( SPMDs) from nine studies published over the past decade, amended with new data obtained in the Scheldt-North Sea area, were assessed to understand the similarities and differences between these sampling matrixes. A model was developed to describe the concentration ratios, using literature values of elimination rate constants and steady-state accumulation factors of both samplers as key parameters. The model could successfully describe the results of seven studies. Differences in concentration ratios among these studies were related to the variability of mussel bioaccumulation factors ( BAFs) and water sampling rates of SPMDs. For two studies, the model could only describe the data by adopting unrealistically high water sampling rates, and for one study there were not enough data to test the model. We argue that SPMDs will generally yield more reliable estimates of exposure concentrations than mussels, because in situ BAF values are difficult to estimate, whereas the in situ exchange kinetics of SPMDs can be quantified by measuring the dissipation rates of performance reference compounds. The implications of the results for future and existing monitoring programs are discussed.