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首页> 外文期刊>Environmental toxicology and chemistry >PERFORMANCE OF PASSIVE SAMPLERS FOR MONITORING ESTUARINE WATER COLUMN CONCENTRATIONS: 1. CONTAMINANTS OF CONCERN
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PERFORMANCE OF PASSIVE SAMPLERS FOR MONITORING ESTUARINE WATER COLUMN CONCENTRATIONS: 1. CONTAMINANTS OF CONCERN

机译：被动采样器的监测水银浓度的性能：1.污染物

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Contaminants enter marine and estuarine environments and pose a risk to human and ecological health. Recently, passive sampling devices have been utilized to estimate dissolved concentrations of contaminants of concern (COCs), such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). In the present study, the performance of 3 common passive samplers was evaluated for sampling PAHs and PCBs at several stations in the temperate estuary Narragansett Bay, Rhode Island, USA. Sampler polymers included polyethylene (PE), polydimethylsiloxane (PDMS)-coated solid-phase microextraction (SPME) fibers, and polyoxymethylene (POM). Dissolved concentrations of each contaminant were calculated using measured sampler concentrations adjusted for equilibrium conditions with performance reference compounds (PRCs) and chemical-specific partition coefficients derived in the laboratory. Despite differences in PE and POM sampler concentrations, calculated total dissolved concentrations ranged from 14 ng/L to 93 ng/L and from 13 pg/L to 465 pg/L for PAHs and PCBs, respectively. Dissolved concentrations of PAHs were approximately 3 times greater based on POM compared to PE, while dissolved concentrations of PCBs based on PE were approximately 3 times greater than those based on POM. Concentrations in SPME were not reported due to the lack of detectable chemical in the amount of PDMS polymer deployed. Continued research is needed to improve and support PE and POM use for the routine monitoring of COCs. For example, a better understanding of the use of PRCs with POM is critically needed.
机译：污染物进入海洋和河口环境，对人类和生态健康构成威胁。近来，无源采样装置已被用于估计所关注的污染物（COC），例如多环芳烃（PAH）和多氯联苯（PCB）的溶解浓度。在本研究中，对3个普通无源采样器的性能进行了评估，以在美国罗得岛温带河口Narragansett湾的多个站点对PAH和PCB进行采样。采样器聚合物包括聚乙烯（PE），涂有聚二甲基硅氧烷（PDMS）的固相微萃取（SPME）纤维和聚甲醛（POM）。使用性能参考化合物（PRC）和在实验室中得出的化学特异性分配系数，使用为平衡条件调整的实测采样器浓度，计算每种污染物的溶解浓度。尽管PE和POM采样器的浓度有所不同，但PAH和PCB的总溶解浓度计算值分别为14 ng / L至93 ng / L和13 pg / L至465 pg / L。基于POM的PAHs溶解浓度约为PE的3倍，而基于PE的PCBs的溶解浓度约为基于POM的PCB的3倍。由于缺少可部署的PDMS聚合物中可检测到的化学物质，因此未报告SPME中的浓度。需要继续研究以改善和支持PE和POM在COC的常规监测中的使用。例如，迫切需要更好地了解PRC与POM的结合使用。

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