Overlooked interaction between redox-mediator and bisphenol-A in permanganate oxidation

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外文摘要：Research efforts on permanganate(Mn(Ⅶ))combined with redox-mediator(RM),have received increasing attention due to their significant performance for bisphenol-A(BPA)removal.However,the mechanisms underpinning BPA degradation remain underexplored.Here we show the overlooked in-teractions between RM and BPA during permanganate oxidation by introducing an RM-N-hydrox-yphthalimide(NHPI).We discovered that the concurrent generation of MnO2 and phthalimide-N-oxyl(PINO)radical significantly enhances BPA oxidation within the pH range of 5.0-6.0.The detection of radical cross-coupling products between PINO radicals and BPA or its derivatives corroborates the pivotal role of radical cross-coupling in BPA oxidation.Intriguingly,we observed the formation of an NHPI-BPA complex,which undergoes preferential oxidation by Mn(Ⅶ),marked by the emergence of an electron-rich domain in NHPI.These findings unveil the underlying mechanisms in the Mn(Ⅶ)/RM system and bridge the knowledge gap concerning BPA transformation via complexation.This research paves the way for further exploration into optimizing complexation sites and RM dosage,significantly enhancing the system's efficiency in water treatment applications.

外文关键词：

PermanganateRedox-mediatorBisphenol-ARadical cross-couplingComplexation

作者：

Honglong Zhang、Qiaoqiao Zhao、Kangbao Zhong、Ruopeng Bai、Jiaojiao Dong、Jun Ma、Jing Zhang、Timothy J.Strathmann

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作者单位：

School of Environment,Harbin Institute of Technology,Harbin,150090,PR China

Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,100084,PR China

School of Chemistry and Chemical Engineering,Chongqing Key Laboratory of Chemical Theory and Mechanism,Chongqing University,Chongqing,401331,PR China

College of Environment and Ecology,Chongqing University,Chongqing 400045,P.R.China

Department of Civil and Environmental Engineering,Colorado School of Mines,1500 Illinois Street,Golden,CO,80401,United States

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出版年：

2024

DOI：

10.1016/j.ese.2024.100421

环境科学与生态技术(英文)

ISSN：

年,卷(期)：2024.21(5)