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Environmental implications of superoxide radicals: From natural processes to engineering applications

Articolo
Data di Pubblicazione:
2024
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°- 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°- contaminants covering a wide diversity of structures and reactivity. The comparison indicates that O2°- 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 radicaladduct 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.
Tipologia CRIS:
03B-Review in Rivista / Rassegna della Lett. in Riv. / Nota Critica
Keywords:
Aquatic chemistry; Environmental implications; Kinetics; Mechanisms; Reactivity; Superoxide radical
Elenco autori:
Luo Z.; Yan Y.; Spinney R.; Dionysiou D.D.; Villamena F.A.; Xiao R.; Vione D.
Autori di Ateneo:
VIONE Davide Vittorio
Link alla scheda completa:
https://iris.unito.it/handle/2318/2030635
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/2030635/1415544/WR2024_Superoxide.pdf
Pubblicato in:
WATER RESEARCH
Journal
Progetto:
GRINS - Growing Resilient, INclusive and Sustainable - PNRR M4C2 Investimento 1.3 Avviso 341/2022
  • Dati Generali
  • Aree Di Ricerca

Dati Generali

URL

https://www.sciencedirect.com/science/article/pii/S0043135424009230

Aree Di Ricerca

Settori (5)


PE4_18 - Environment chemistry - (2024)

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Chimica e Ambiente

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Energia e Fonti Energetiche

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Chimica Organica e Industriale

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Materiali Avanzati
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