Non-target and suspect screening of per- and polyfluoroalkyl substances in Chinese municipal wastewater treatment plants
Non-target and suspect screening of per- and polyfluoroalkyl substances in Chinese municipal wastewater treatment plants
复制标题
中国城市污水处理厂中全氟烷基和多氟烷基物质的非目标和可疑筛查
DOI：
10.1016/j.watres.2020.115989
复制
发表时间：
2020
期刊：
影响因子：
12.8
通讯作者：
Si Wei
中科院分区：
文献类型：
--
作者：
Xuebing Wang;Nanyang Yu;Yuli Qian;Wei Shi;Xiaowei Zhang;Jinju Geng;Hongxia Yu;Si Wei
污水处理厂(WWTP)是水环境中多氟烷基物质(PFASs)的主要来源之一。本研究从中国17个城市的17个污水处理厂采集了废水样本，以调查污水处理厂中出现的PFASs。为了全面鉴定废水样品中的PFASs，提出了一种基于可疑筛选、基于同源基因和基于片段的非靶标筛选相结合的方法。从13个类别(25个亚类)鉴定出63个PFAS，其中包括14个遗留PFAS和49个新兴PFAS，本研究首次报道了其中12个PFAS。研究发现，新兴的全氟辛烷磺酸浓度与国内生产总值呈显著正相关，说明中国经济发达地区对传统全氟辛烷磺酸的替代较多。我们还分析了13个PFAS类的去除情况，发现所有发现的PFAS类在处理过程中并没有完全去除，而全氟烷基醚醇类却显著增加。所有这些结果表明，在中国看来，污水处理厂释放新出现的或未知的全氟辛烷磺酸是一个普遍但不可忽视的问题。
Wastewater treatment plant (WWTP) is one of the major sources of per- and polyfluoroalkyl substances (PFASs) to the aquatic environment. In this study, wastewater samples were collected from 17 WWTPs in 17 cities of China to investigate emerging PFASs in WWTPs. To comprehensively identify PFASs in the wastewater samples, an integrated suspect screening, homologue-based and fragment-based non-target screening method is proposed. Sixty-three PFASs from 13 classes (25 subclasses) were identified, including 14 legacy and 49 emerging PFASs, and this study is the first to report on 12 of these PFASs. We found that emerging PFASs concentration had a significantly positive correlation with the gross domestic product, indicating more substitution of legacy PFASs in the developed area of China. We also analyzed the removal of the 13 PFAS classes, and found that all discovered PFAS classes were not completely removed after the treatment process, whereas the class of perfluoroalkyl ether alcohols significantly increased. All of these results imply that the release of emerging or unknown PFASs from WWTPs is a universal but not negligible problem in China.