PERFLUORINATED CHEMICALS IN SURFACE WATERS AND SEDIMENTS FROM NORTHWEST GEORGIA, USA, AND THEIR BIOACCUMULATION IN LUMBRICULUS VARIEGATUS
PERFLUORINATED CHEMICALS IN SURFACE WATERS AND SEDIMENTS FROM NORTHWEST GEORGIA, USA, AND THEIR BIOACCUMULATION IN LUMBRICULUS VARIEGATUS
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DOI：
10.1002/etc.622
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发表时间：
2011-10-01
影响因子：
4.1
通讯作者：
Jenkins, Thomas M.
中科院分区：
文献类型：
--
作者：
Lasier, Peter J.;Washington, John W.;Jenkins, Thomas M.
对美国佐治亚州西北部库萨河流域的地表水和沉积物中的全氟化合物(PFC)浓度进行了测量，以检查其在疑似污染源下游的分布。对8个采样点的样品进行了液-质联用分析。沉积物也被用来评估PFC的生物积累，在28天的暴露中与水生少毛类--变形虫接触。地表水和沉积物中全氟碳化物的浓度在市政/工业废水的土地应用场地(LAS)以下显著增加，并因下游不明来源而进一步升高。在地表水中，含8个或更少碳的全氟羧酸(PFCA)最为突出。那些含有10个或更多碳的人主要是沉积物和组织样本。全氟辛烷磺酸(PFOS)是污染沉积物和组织中的主要同系物。沉积物PFC浓度的这种模式在不同站点之间是一致的，并反映了LAS发出的同源浓度。寡毛类组织中全氟碳化合物的浓度显示出与在相应沉积物中观察到的类似的模式。随着PFCA链长和磺酸盐部分的存在，生物积累的趋势增加。生物-沉积物积累系数表明，在水生生态系统中，碳含量少于7的短链全氟辛烷磺酸可能是无害环境的替代品；然而，含有4至7个碳的磺酸盐可能与全氟辛烷磺酸一样有可能在生物上积累。环境。托昔康。化学。2011；30：2194-2201。(C)2011年SETAC
Concentrations of perfluorinated chemicals (PFCs) were measured in surface waters and sediments from the Coosa River watershed in northwest Georgia, USA, to examine their distribution downstream of a suspected source. Samples from eight sites were analyzed using liquid chromatography-tandem mass spectrometry. Sediments were also used in 28-d exposures with the aquatic oligochaete, Lumbriculus variegatus, to assess PFC bioaccumulation. Concentrations of PFCs in surface waters and sediments increased significantly below a land-application site (LAS) of municipal/industrial wastewater and were further elevated by unknown sources downstream. Perfluorinated carboxylic acids (PFCAs) with eight or fewer carbons were the most prominent in surface waters. Those with 10 or more carbons predominated sediment and tissue samples. Perfluorooctane sulfonate (PFOS) was the major homolog in contaminated sediments and tissues. This pattern among sediment PFC concentrations was consistent among sites and reflected homolog concentrations emanating from the LAS. Concentrations of PFCs in oligochaete tissues revealed patterns similar to those observed in the respective sediments. The tendency to bioaccumulate increased with PFCA chain length and the presence of the sulfonate moiety. Biota-sediment accumulation factors indicated that short-chain PFCAs with fewer than seven carbons may be environmentally benign alternatives in aquatic ecosystems; however, sulfonates with four to seven carbons may be as likely to bioaccumulate as PFOS. Environ. Toxicol. Chem. 2011;30:2194-2201. (C) 2011 SETAC