SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China.
SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China.
Sci Total Environ. 2022 Oct 20;844:157021. doi: 10.1016/j.scitotenv.2022.157021. Epub 2022 Jun 28.
Landfills are the main destination of many urban wastes containing per- and polyfluoroalkyl substances (PFAS), and PFAS may leach out from the waste and contaminate the surrounding groundwater. Here we investigated the occurrence of PFAS in leachate and surrounding groundwater from three landfills in Guangzhou, China by using a combined target and non-target approach. Non-target screening showed that a total of 651 PFAS with 96 classes were identified, including 17 legacy PFAS and 637 emerging PFAS. The quantitative target analysis of some PFAS revealed that the average removal rate of PFAS from the raw leachates were ranged between 62 % and 99 %. Statistical analysis and source analysis suggested that landfill leachate was a major source of PFAS in the groundwater within the landfills and downstream sites. The results from the combined target and non-target analyses demonstrated that PFAS in landfills could leach into the surrounding groundwater, and may affect the sustainable use of groundwater as a source of drinking water and pose a potential risk to human health.
垃圾填埋场是许多含有全氟和多氟烷基物质（PFAS）的城市废物的主要去向，PFAS 可能会从废物中渗出并污染周围的地下水。在这里，我们采用靶向和非靶向相结合的方法，调查了中国广州三个垃圾填埋场渗滤液和周围地下水中的 PFAS 含量。非靶向筛选共鉴定出 651 种 96 类 PFAS，包括 17 种传统 PFAS 和 637 种新兴 PFAS。一些 PFAS 的定量目标分析表明，PFAS 的平均去除率在 raw leachates 之间的范围在 62%到 99%之间。统计分析和来源分析表明，垃圾填埋场渗滤液是填埋场内和下游地区地下水 PFAS 的主要来源。靶向和非靶向分析的结果表明，填埋场中的 PFAS 可能会渗滤到周围的地下水中，并可能影响地下水作为饮用水源的可持续利用，对人类健康构成潜在风险。
