文献类型：期刊文献

英文题名：Quantifying PFAS contamination and environmental risk in municipal solid waste landfill refuse: Implications for landfill reuse

作者：Yu, Xia[1,3];Tang, Linfeng[1];Yan, Ruiqi[1];Wang, Jiaxi[1];Zhao, Wentao[2];Lyu, Shuguang[1,3];Sui, Qian[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：283

外文期刊名：WATER RESEARCH

收录：;EI(收录号：20252218502767);WOS:【SCI-EXPANDED(收录号:WOS:001501670700002)】；

基金：This research was partly supported by the National Key R & D Pro-gram of China (2023YFC3711600) , the National Natural Science Foundation of China (22376066) , the Science and Technology Com-mission of Shanghai Municipality's Yangfan Special Project (23YF1408400) , and the Fundamental Research Funds for the Central Universities. We also thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the quantification.

语种：英文

外文关键词：Emerging contaminants; Landfill utilization; PFAS distribution; PFAA precursors; Environmental risk

摘要：Per- and polyfluoroalkyl substances (PFAS) are frequently detected at elevated levels in municipal solid waste (MSW) landfill leachate, which is recognized as an important source of environmental PFAS contamination. Yet, PFAS presence in MSW landfill refuse remains largely unexplored, despite the growing interest in landfill refuse utilization and the potential for subsequent PFAS emissions into the environment. This study aimed to quantify PFAS contamination in landfill refuse collected from a closed, typical MSW landfill, by analyzing 24 PFAS (including 18 perfluoroalkyl acids (PFAAs) and 6 PFAA precursors) through target analysis and further capturing unknown precursors using a direct total oxidizable precursor (d-TOP) assay. Our findings revealed that perfluorooctanoic acid (PFOA) was the dominant PFAS in landfill refuse, with a median concentration exceeding 10 mu g/kg. The comparison of PFAS in refuse and leachate based on detection and mass level clearly reflected that large amount of PFAS, particularly long-chain perfluoroalkyl carboxylic acids (PFCAs) and PFAA precursors, was still retained in refuse compared to leachate even after more than ten years' leaching. Moreover, significant levels of unknown precursors were identified through the d-TOP assay, highlight that neglecting these unknown precursors could lead to an underestimation of PFAS contamination by a factor of 4 to 18. A probabilistic risk assessment indicated a 25 % likelihood that PFAS in landfill refuse pose moderate to high environmental risk, if excavated refuse is sieved and used as greening soil. To our knowledge, this study marks the first report on PFAS distribution between landfill refuse and leachate, as well as the contribution of unknown precursors in refuse, which underscores the need to consider potential PFAS emission when MSW landfill refuse faces utilization.