文献类型：期刊文献

英文题名：Electrooxidation of perfluorooctanesulfonic acid on porous Magneli phase titanium suboxide Anodes: Impact of porous structure and composition

作者：Wang, Yaye[1];Li, Lei[1];Wang, Yifei[1];Shi, Huanhuan[1,2];Wang, Lu[1,3];Huang, Qingguo[1]

机构：[1]Univ Georgia, Dept Crop & Soil Sci, Coll Agr & Environm Sci, Griffin, GA 30223 USA;[2]Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450001, Peoples R China;[3]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China

年份：2022

卷号：431

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000772824300001)、、WOS

基金：Acknowledgements This study was supported in part by U.S. Department of Defense SERDP ER-2717 and ER-1320, as well as U.S. Environmental Protection Agency National Priorities Program Grant 840080. It has not been formally reviewed by the funding agencies. The views expressed in this document are solely those of the authors and do not necessarily reflect those of the funding agencies. DoD or EPA do not endorse any products or commercial services mentioned in this publication.

语种：英文

外文关键词：PFASs; Electro-oxidative Treatment; Reactive Electrochemical Membrane; Porous Structure

外文摘要：Destruction of perand polyfluoroalkyl substances (PFASs) in water is of great interest for water and wastewater treatment purposes. This study examined the electro-oxidative degradation of a representative PFAS, perfluorooctanesulfonic acid (PFOS), on different porous Magne ' li phase titanium suboxide (TSO) anodes, with energy efficiency compared in both batch and reactive electrochemical membrane (REM) systems at different operation conditions. The anode materials are of different primary compositions (Ti4O7 or Ti9O17) and have different porous structures. The experiment results along with electrochemical characterization and density functional theory (DFT) computation reveal that the greater fraction of Ti3+ ion in Ti4O7 than that in Ti9O17 enhances the anodic reactivity by increasing the affinity of PFOS and reducing the energy barrier of direct electron transfer, leading to greater PFOS degradation efficiency. The data also suggest that the pores in the TSO anodes with sizes smaller than 1.03 mu m do not contribute to their effective electroactive surface because of restrictive electrolyte transport, and thus may not contribute to PFOS degradation. The results of this study provide a basis for design and optimization of TSO-based electro-oxidative treatment of PFAS-contaminated waters.