Perfluoroalkyl acid transformation and mitigation by nNiFe-activated carbon nanocomposites in steady-state flow column studies

作     者：Mahsa Modiri-Gharehveran Younjeong Choi Jenny E.Zenobio Linda S.Lee Mahsa Modiri-Gharehveran;Younjeong Choi;Jenny E.Zenobio;Linda S.Lee

作者机构：Department of AgronomyPurdue UniversityWest LafayetteIN 47907USA Interdisciplinary Ecological Sciences&EngineeringPurdue UniversityWest LafayetteIN 47907USA 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第127卷第5期

页      面：678-687页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0701[理学-数学] 

基　　金：funded by the Strategic Environmental Research and Development Program(No.SERDP/ER-2426) Geosyntec and the USDA National Institute of Food and Agriculture Hatch Funds Accession No.1006516 

主　　题：PFAAs PFAS Zero valent iron Nanoparticles Remediation Groundwater 

摘      要：The ongoing contamination of groundwater with per-and polyfluoroalkyl substances(PFAS)has resulted in a global and rapidly growing interest in PFAS groundwater *** technologies that lead to PFAS destruction are often limited by not addressing all PFAS,being energy-intensive or not being suited for in-situ *** developed nNiFeactivated carbon(AC)nanocomposites and demonstrated varying degrees of PFAS reduction and fluoride generation with these nanocomposites in batch reactors for several *** we explore nNiFe-AC’s effectiveness to transform perfluoroalkyl acid acids(PFAAs)under steady-state flow(0.0044 to 0.15 mL/min)in nNiFe-AC:sand packed *** experiments included,two perfluorooctane sulfonate(PFOS)in deionized water and two PFAA mixtures in deionized water or bicarbonate buffer containing five perfluoroalkyl carboxylates(PFCAs,C5-C9)and three perfluoroalkyl sulfonates(PFSAs,C4,C6 and C8)at temperatures of 50 or 60℃ were *** transformation was similar in PFOS-only and PFAA mixture column ***,%PFAA transformation under flow conditions exceeded what we observed previously in batch reactors with up to 53%transformation of a PFAA mixture with∼8%*** chain PFAS dominated the PFAAs transformed and a bicarbonate matrix appeared to reduce overall *** breakthrough was slower than predicted from only sorption due to transformation;some longer chain PFAS like PFOS did not ***,nNiFe-AC technology with both in-situ and ex-situ potential application was shown to be a plausible part of a treatment train needed to address the ongoing challenge for cleaning up PFAS-contaminated waters.