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Huang Y, Zou J, Lin J, Yang H, Wang M, Li J, Cao W, Yuan B, Ma J. ABTS as Both Activator and Electron Shuttle to Activate Persulfate for Diclofenac Degradation: Formation and Contributions of ABTS •+, SO 4•-, and •OH. Environ Sci Technol 2023; 57:18420-18432. [PMID: 36260114 DOI: 10.1021/acs.est.2c04318] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The activation of peroxydisulfate (PDS) by organic compounds has attracted increasing attention. However, some inherent drawbacks including quick activator decomposition and poor anti-interference capacity limited the application of organic compound-activated PDS. It was interestingly found that 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonate) (ABTS) could act as both activator and electron shuttle for PDS activation to enhance diclofenac (DCF) degradation over a pH range of 2.0-11.0. Multiple reactive species of ABTS•+, •OH, and SO4•- were generated in the PDS/ABTS system, while only ABTS•+ and •OH directly contributed to DCF degradation. ABTS•+, generated via the reactions of ABTS with PDS, SO4•-, and •OH, was the dominant reactive species of DCF degradation. No significant decomposition of ABTS was observed in the PDS/ABTS system, and ABTS acted as both activator and electron shuttle. Four possible degradation pathways of DCF were proposed, and the toxicity of DCF decreased after treatment with the PDS/ABTS system. The PDS/ABTS system had good anti-interference capacity to common natural water constituents. Additionally, ABTS was encapsulated into cellulose to obtain ABTS@Ce beads, and the PDS/ABTS@Ce system possessed excellent performance on DCF degradation. This study proposes a new perspective to reconsider the mechanism of activating PDS with organic compounds and highlights the considerable contribution of organic radicals on contaminant removal.
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Affiliation(s)
- Yixin Huang
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Jing Zou
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Jinbin Lin
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Haoyu Yang
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Mengyun Wang
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang150090, P.R. China
| | - Jiawen Li
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Wei Cao
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
| | - Baoling Yuan
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian361021, P.R. China
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun130118, P.R. China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang150090, P.R. China
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Huang J, Zhu Y, Bian H, Song L, Liu Y, Lv Y, Ye X, Lin C, Li X. Insights into Enhanced Peroxydisulfate Activation with B and Fe Co-Doped Biochar from Bark for the Rapid Degradation of Guaiacol. Molecules 2023; 28:7591. [PMID: 38005313 PMCID: PMC10674898 DOI: 10.3390/molecules28227591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
A boron and iron co-doped biochar (B-Fe/biochar) from Masson pine bark was fabricated and used to activate peroxydisulfate (PDS) for the degradation of guaiacol (GL). The roles of the dopants and the contribution of the radical and non-radical oxidations were investigated. The results showed that the doping of boron and iron significantly improved the catalytic activity of the biochar catalyst with a GL removal efficiency of 98.30% within 30 min. The degradation of the GL mainly occurred through the generation of hydroxyl radicals (·OHs) and electron transfer on the biochar surface, and a non-radical degradation pathway dominated by direct electron transfer was proposed. Recycling the B-Fe/biochar showed low metal leaching from the catalyst and satisfactory long-term stability and reusability, providing potential insights into the use of metal and non-metal co-doped biochar catalysts for PDS activation.
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Affiliation(s)
- Jian Huang
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Yu Zhu
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Huiyang Bian
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
| | - Liang Song
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Yifan Liu
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Yuancai Lv
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Xiaoxia Ye
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Chunxiang Lin
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
| | - Xiaojuan Li
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China; (J.H.); (Y.Z.); (L.S.); (Y.L.); (Y.L.); (X.Y.)
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Wang W, Zhang J, Hou Z, Chen P, Zhou X, Wang W, Tan F, Wang X, Qiao X. Improvement of Carbonyl Groups and Surface Defects in Carbon Nanotubes to Activate Peroxydisulfate for Tetracycline Degradation. Nanomaterials (Basel) 2023; 13:nano13010216. [PMID: 36616125 PMCID: PMC9824654 DOI: 10.3390/nano13010216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/26/2022] [Accepted: 12/30/2022] [Indexed: 05/23/2023]
Abstract
Carbon nanotubes (CNTs) were considered a promising activator for persulfates due to their high electrical conductivity, large specific surface area and low toxicity. The functional groups and surface defects of CNTs could significantly affect their activation performance. In this study, CNTs with high C=O ratio and defect density (CNT-O-H) were prepared through a facile treatment of raw CNTs with HNO3 oxidation followed by calcination at 800 °C under an argon atmosphere. X-ray photoelectron spectroscopy (XPS) and Raman results showed that the C=O proportion and defect degree (ID/IG) rose to 75% and 1.53, respectively. The obtained CNT-O-H possessed a superior performance towards peroxydisulfate (PDS) activation, and the degradation efficiency of tetracycline (TC) in the CNT-O-H/PDS system was increased to 75.2% from 56.2% of the raw CNTs/PDS system within 40 min. Moreover, the activity of CNT-O-H after use could be easily recovered with re-calcination. In addition, the CNT-O-H/PDS system exhibited high adaptabilities towards wide solution pH (2-10), common coexisting substances and diverse organic pollutants. Singlet oxygen (1O2) was confirmed to be the dominant reactive oxygen species (ROS) generated in the CNT-O-H/PDS system. It was inferred that surface C=O groups and defects of CNTs were the key site to activate PDS for TC degradation.
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Affiliation(s)
| | | | | | | | | | - Wei Wang
- Correspondence: ; Tel./Fax: +86-27-87541540
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