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Environmental implications of superoxide radicals: From natural processes to engineering applications.
Luo, Zonghao; Yan, Yiqi; Spinney, Richard; Dionysiou, Dionysios D; Villamena, Frederick A; Xiao, Ruiyang; Vione, Davide.
Afiliación
  • Luo Z; Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
  • Yan Y; Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
  • Spinney R; Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA.
  • Dionysiou DD; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio, 45221, USA.
  • Villamena FA; Department of Biological Chemistry and Pharmacology, The Ohio State University, Columbus, Ohio, 43210, USA.
  • Xiao R; Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China. Electronic address: xiao.53@csu.edu.cn.
  • Vione D; Department of Chemistry, University of Turin, Via Pietro Giuria 5, 10125, Torino, Italy. Electronic address: davide.vione@unito.it.
Water Res ; 261: 122023, 2024 Sep 01.
Article en En | MEDLINE | ID: mdl-38991243
ABSTRACT
The roles of superoxide radical (O2•-) in the domains of physiological, physical, and material chemistry are becoming increasingly recognized. Although extensive efforts have been directed to understand O2•- functions in diverse aquatic systems, there is a lack of systematic and in-depth review for its kinetics and mechanisms in various environmental scenarios. This review aims to bridge this gap through discussion of O2•- generation pathways under both natural and controlled conditions. The merits and limitations of the generation and detection methods under various conditions are compared, with emphasis on different approaches for the determination of O2•--triggered reaction kinetics. We summarize the reaction rate constants of O2•- with organic contaminants covering a wide diversity of structures and reactivity. The comparison indicates that O2•- exhibits weak reactivity with most contaminants and lacks selectivity towards compounds with different functional groups, except with quinones which exhibit higher reactivity compared to non-quinones. Further, the reaction mechanisms, namely single electron transfer, nucleophilic substitution, hydrogen atom abstraction, and radical-adduct formation, are critically evaluated. Various environmental implications of O2•- are highlighted including maintenance of biogeochemical iron cycle, synthesis of nanoparticles for antibacterial purposes, desorption of contaminants from heterogeneous interfaces, and synergetic degradation of contaminants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Superóxidos Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Superóxidos Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido