文献类型：期刊文献

英文题名：Fate and removal of per- and polyfluoroalkyl substances throughout landfill leachate treatment processes: Uncovering precursor transformation and sludge-mediated reappearance

作者：Chen, Liping[1];Yu, Xia[1,2];Cai, Lankun[1];Sui, Qian[1,2]

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]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：206

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20253218948701);WOS:【SCI-EXPANDED(收录号:WOS:001583289400001)】；

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

语种：英文

外文关键词：Per; and polyfluoroalkyl substances (PFAS); Landfill leachate; Removal efficiency; Mass flow; Precursor transformation

摘要：Per- and polyfluoroalkyl substances (PFAS) in municipal solid waste (MSW) landfill leachate have emerged as a critical research focus because of their substantial environmental and health risks. However, the fate and transformation of PFAS across different treatment processes, particularly within specific techniques such as biotreatment, remains understudied in current research. This study systematically investigated the occurrence, fate, and removal of PFAS in a full-scale MSW landfill leachate treatment system in Shanghai, China. Thirty-two PFAS were analyzed in the raw leachate and the whole treatment process, including the equalization tank, the membrane bioreactor (MBR) system, and the nanofiltration (NF) process. Results showed that perfluorooctanoic acid (PFOA) and perfluorobutanesulfonic acid (PFBS) were the predominant compounds in both the raw leachate and effluents. The MBR process exhibited negative removal efficiencies for short-chain PFAS (-187.4 % to -103.5 %), indicating substantial precursor transformation, while NF achieved effective removal (42.1 % to 95.6 %). Solid phases of the sludge samples accumulated long-chain PFAS (log Kd up to 4.4), acting as significant secondary sources. Mass flow analysis revealed that denitrification processes increased the absolute daily load of PFOA (calculated as concentration x flow rate) by 4286 %, with the total oxidizable precursor (TOP) assays demonstrating the fluorotelomer-based precursors were the major contributors to perfluoroalkyl carboxylic acids (PFCAs) formation. The findings provide essential insights for developing more effective leachate treatment strategies and sludge management approaches to mitigate PFAS environmental release from MSW landfills.