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Zhang H, Zhao Q, Zhong K, Bai R, Dong J, Ma J, Zhang J, Strathmann TJ. Overlooked interaction between redox-mediator and bisphenol-A in permanganate oxidation. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 21:100421. [PMID: 38774192 PMCID: PMC11106538 DOI: 10.1016/j.ese.2024.100421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 04/13/2024] [Accepted: 04/14/2024] [Indexed: 05/24/2024]
Abstract
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 interactions between RM and BPA during permanganate oxidation by introducing an RM-N-hydroxyphthalimide (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.
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Affiliation(s)
- Honglong Zhang
- School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, PR China
| | - Qiaoqiao Zhao
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing, 401331, PR China
| | - Kangbao Zhong
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing, 401331, PR China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing, 401331, PR China
| | - Jiaojiao Dong
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Jun Ma
- School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Jing Zhang
- School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Timothy J. Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, CO, 80401, United States
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Wang X, Fu G, Ren NQ. Artificial intelligence is transforming the research paradigm of environmental science and engineering. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 19:100346. [PMID: 38058954 PMCID: PMC10696158 DOI: 10.1016/j.ese.2023.100346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Affiliation(s)
- Xu Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
| | - Guangtao Fu
- Centre for Water Systems, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, United Kingdom
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
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