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Cited by 285

The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.

Insights into the Electron-Transfer Mechanism of Permanganate Activation by Graphite for Enhanced Oxidation of Sulfamethoxazole

Peng, Jiali, Zhou, Peng, Zhou, Hongyu, Liu, Wen, Zhang, Heng, Zhou, Chenying, Lai, Leiduo, Ao, Zhimin, Su, Shijun, Lai, Bo·2021·Environmental Science & Technology

Abstract

Abstract Many reagents as electron sacrificers have been recently investigated to induce decomposition of permanganate (KMnO4) to produce highly reactive intermediate Mn species toward oxidation of organic contaminants; however, this strategy meanwhile causes low KMnO4 utilization efficiency. This study surprisingly found that graphite can mediate direct electron transfer from organics (e.g., sulfamethoxazole (SMX)) to KMnO4, resulting in high KMnO4 utilization efficiency, rather than reductive sites of graphite-induced conversion of KMnO4 to highly reactive intermediate Mn species. The galvanic oxidation process (GOP) and comparative experiments of different organic contaminants prove that the KMnO4/graphite system mainly extracts electrons from organic contaminants via a one-electron pathway instead of a two-electron pathway. More importantly, the KMnO4/graphite system has superior reusability, graphite can keep a long-lasting reactivity, and the KMnO4 utilization efficiency elevates significantly after each cycle of graphite. The transformation of SMX in the KMnO4/graphite system mainly includes self-coupling, hydroxylation, oxidation, and hydrolytic reaction. The work will improve insights into the electron-transfer mechanism and unveil the advantages of efficient KMnO4 utilization in the KMnO4-based technologies in environmental remediation.

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Crossref · 10.1021/acs.est.1c00020

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Metadata

Authors
Peng, J., Zhou, P., Zhou, H., Liu, W., Zhang, H., Zhou, C., Lai, L., Ao, Z., Su, S., & Lai, B.
Venue
Environmental Science & Technology
Published
2021-05-28
Volume
55
Issue
13
Pages
9189-9198
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W3165242037
Cited by
285
References
29
FWCI
13.37
Type
journal article
Language
en
Open access
closed

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