Spatial distribution of perfluoroalkyl acids in the Pearl River of Southern China

支流 全氟辛烷 环境化学 化学 环境科学 地表水 珍珠 水文学(农业) 磺酸盐 地质学 环境工程 地理 地图学 考古 有机化学 岩土工程
作者
Yingyi Zhang,Senchao Lai,Zhen Zhao,Fobang Liu,Hongwei Chen,Shichun Zou,Zhiyong Xie,Ralf Ebinghaus
出处
期刊:Chemosphere [Elsevier BV]
卷期号:93 (8): 1519-1525 被引量:57
标识
DOI:10.1016/j.chemosphere.2013.07.060
摘要

An intensive campaign was conducted in September 2012 to collect surface water samples along the tributaries of the Pearl River in southern China. Thirteen perfluoroalkyl acids (PFAAs), including perfluorocarboxylates (PFCAs, C4–C11) and perfluorosulfonates (PFSAs, C4, C6–C8, and C10), were determined using high-performance liquid chromatography/negative electrospray ionization–tandem mass spectrometry (HPLC/(-)ESI–MS/MS). The concentrations of total PFAAs (ΣPFAAs) ranged from 3.0 to 52 ng L−1, with an average of 19 ± 12 ng L−1. The highest concentrations of ΣPFAAs were detected in the surface water of the Dong Jiang tributary (17–52 ng L−1), followed by the main stream (13–26 ng L−1) and the Sha Wan stream (3.0–4.5 ng L−1). Perfluorooctanoate (PFOA), perfluorobutane sulfonate (PFBS), and perfluorooctane sulfonate (PFOS) were the three most abundant PFAAs and on average accounted for 20%, 24%, and 19% of ΣPFAAs, respectively. PFBS was the most abundant PFAA in the Dong Jiang tributary, and PFOA was the highest PFAA in the samples from the main stream of the Pearl River. A correlation was found between PFBS and PFOA, which suggests that both of these PFAAs originate from common source(s) in the region. Nevertheless, the slope of PFBS/PFOA was different in the different tributaries sampled, which indicates a spatial difference in the source profiles of the PFAAs.
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