Occurrence and distribution of perfluoroalkyl substances (PFASs) in the water dissolved phase and suspended particulate matter of the Dalian Bay, China
Occurrence and distribution of perfluoroalkyl substances (PFASs) in the water dissolved phase and suspended particulate matter of the Dalian Bay, China
复制标题
中国大连湾水相和悬浮颗粒物中全氟烷基物质（PFASs）的存在和分布
DOI：
10.1016/j.chemosphere.2018.02.093
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发表时间：
2018-06-01
期刊：
影响因子：
8.8
通讯作者：
Cui, Fuxu
中科院分区：
文献类型：
--
作者：
Ding, Guanghui;Xue, Huanhuan;Cui, Fuxu
研究了大连湾水体中全氟烷烃（PFASs）在水溶相和悬浮颗粒物（SPM）相中的污染程度和空间分布，以及SPM-水的分配行为。水溶相中全氟辛烷（Sigma PFASs）的总浓度在6.9 ~ 17.1 ng L-1之间，全氟辛酸（PFOA）、全氟丁酸和全氟丁烷磺酸（PFBS）是主要的全氟辛烷，而SPM中的Sigma PFASs在1.7 ~ 27.5 ng g(-1) dw之间，全氟辛烷磺酸、全氟辛烷磺酸和全氟辛烷磺酸的贡献较大。从污染分布上看，大连湾内PFASs浓度高于湾外。对于全氟烷基羧酸（PFCAs）和全氟烷烃磺酸（PFSAs），悬浮颗粒物-水分配系数（log K-d）分别为2.62 ~ 3.76和3.39 ~ 3.56。PFASs的log K-d值一般随每氟化碳链长度的增加而增加。短链PFCAs主要存在于水溶相，而长链PFCAs和PFSAs与SPM相结合更强。如果只测量水溶相，则长链PFCAs和pfsa的污染水平可能被低估。因此，进一步的研究应考虑SPM对水生环境中全氟磺酸的环境行为和命运的作用。(C) 2018 Elsevier Ltd.版权所有。
In the present study, the contamination level and spatial distribution of PFASs in the water dissolved phase and suspended particulate matter (SPM) phase of the Dalian Bay, and the SPM-water partition behavior were investigated. The total concentrations of PFASs (Sigma PFASs) in the water dissolved phase ranged from 6.9 to 17.1 ng L-1, with perfluorooctanoic acid (PFOA), perfluorobutanoic acid, and perfluorobutane sulfonate (PFBS) as the predominant PFASs, while Sigma PFASs in SPM ranged from 1.7 to 27.5 ng g(-1) dw with higher contributions from PFBS, perfluorooctane sulfonic acid and PFOA. As for the pollution distribution, the concentrations of PFASs inside the Dalian Bay were higher than those outside the bay. For perfluoroalkyl carboxylic acid (PFCAs) and perfluoroalkane sulfonic acids (PFSAs), the suspended particulate matter-water partition coefficient (log K-d) values ranged from 2.62 to 3.76, and from 3.39 to 3.56, respectively. The log K-d values of PFASs generally increased with the increasing per fluorinated carbon chain length. Short-chain PFCAs were mostly detected in the water dissolved phase, while long-chain PFCAs and PFSAs appeared to bind more strongly to SPM phase. The contamination level of long-chain PFCAs and PFSAs could be underestimated if only the water dissolved phase were measured. Therefore, further investigations should consider the role of SPM on the environmental behavior and fate of PFASs in the aquatic environment. (C) 2018 Elsevier Ltd. All rights reserved.