Measuring nonpolar organic contaminant partitioning in three Norwegian sediments using polyethylene passive samplers
Measuring nonpolar organic contaminant partitioning in three Norwegian sediments using polyethylene passive samplers
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DOI：
10.1016/j.scitotenv.2012.02.027
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发表时间：
2012-04-15
影响因子：
9.8
通讯作者：
Naes, Kristoffer
中科院分区：
文献类型：
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作者：
Allan, Ian J.;Ruus, Anders;Naes, Kristoffer
在挪威的三个地点的底部沉积物中测量了多环芳烃（PAHs）、多氯联苯（PCBs）、五氯苯和六氯苯（PeCB和HCB）、八氯苯乙烯（OCS）、p，p '-DDE和p，p'-DDD的自由溶解孔隙水浓度。沉积物来自Aker Brygge，位于Grenlandsfjord地区的Oslofjord，Frierfjord内部的前造船厂，在镁冶炼厂长达50年的活动期间受到影响，以及来自Kristiansand港口，具有高度工业活动的场地。低密度聚乙烯（LDPE）膜采样器暴露于这些沉积物在实验室培养下恒定和低水平的搅拌时间为1，2，6，13，23和50天。自由溶解的孔隙水浓度估计污染物质量积累和采样率从性能参考化合物（PRCs）的耗散动力学的测量。自由溶解的PAN浓度和由此产生的有机碳归一化沉积物孔隙水分配系数，logK（TOC），这三个沉积物之间的显着差异，可以观察到，尽管一般相似的总沉积物浓度。与PAN数据相比，分区的多氯联苯和其他有机氯化合物（OC）是相对相似的，在所有三个沉积物。对于来自弗里耶尔峡湾和克里斯蒂安桑的沉积物，多氯联苯/有机碳的logK（TOC）值低于多环芳烃，表明其可用性较高。类似的分区多环芳烃和多氯联苯/有机碳被发现从阿克Brygge沉积物。没有简单的logK（oc）-logK（ow）关系可以成功地模拟这些数据。这些结果支持这样的观点，即在大多数情况下，评估沉积物中存在的这些化合物所造成的风险需要实际测量污染物的可用性。(C)2012爱思唯尔有限公司版权所有。
Freely dissolved pore water concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), penta- and hexachlorobenzene (PeCB and HCB), octachlorostyrene (OCS), p,p'-DDE and p,p'-DDD were measured in bottom sediments from three sites in Norway. Sediments were from Aker Brygge, site of a former shipyard in the inner part of Oslofjord, Frierfjord in the Grenlandsfjord area, impacted during the 50 year-long activity of a magnesium smelter plant, and from Kristiansand harbour, site with high industrial activity. Low density polyethylene (LDPE) membrane samplers were exposed to these sediments in laboratory incubation under constant and low-level agitation for periods of 1, 2, 6, 13, 23 and 50 days. Freely dissolved pore water concentrations were estimated from contaminant masses accumulated and sampling rates obtained from the measurement of kinetics of dissipation of performance reference compounds (PRCs). Marked differences in freely dissolved PAN concentrations and resulting organic carbon-normalised sediment-pore water partition coefficients, logK(TOC), between these three sediments could be observed despite the generally similar total sediment concentrations. In contrast with the PAN data, partitioning of PCBs and other organochlorine compounds (OCs) was relatively similar in all three sediments. For sediments from Frierfjord and Kristiansand, logK(TOC) values were lower for PCBs/OCs than for PAHs, indicating higher availability. Similar partitioning of PAHs and PCBs/OCs was found for sediments from Aker Brygge. No simple logK(oc)-logK(ow) relationships could model these data successfully. These results support the notion that the assessment of the risk posed by these compounds present in sediments in most cases requires actual measurement of contaminant availability. (C) 2012 Elsevier B.V. All rights reserved.