Simultaneous oxidation of trace organic contaminant and Mn(II) by Mn(VII): Accelerating role of dissolved oxygen

Autor:	Shule, Duan, Huiyu, Dong, Pin, Hou, Gangsheng, Han, Bochao, Zhang, Zhimin, Qiang
Rok vydání:	2022
Předmět:	Oxygen Environmental Engineering Phenols Superoxides Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Environmental Chemistry Sulfones General Medicine General Chemistry Benzhydryl Compounds Oxidants Pollution
Zdroj:	Chemosphere. 308:136321
ISSN:	0045-6535
DOI:	10.1016/j.chemosphere.2022.136321
Popis:	Permanganate (Mn(VII)) is a widely used oxidant in water treatment, which can oxidize trace organic contaminants (TrOCs) and Mn(II). Interestingly, this study found that presence of Mn(II) could accelerate the abatement of bisphenol A by Mn(VII) only under oxic condition. Herein, the effects of Mn(II) and dissolved oxygen (DO) on the abatement of TrOCs by Mn(VII) oxidation and the related mechanism were investigated. Results indicate that DO was involved in the Mn(VII)/Mn(II) reaction, with the reaction stoichiometry of Δ[Mn(VII)]:Δ[Mn(II)] determined to be 1:2 and 1:1.5 in the presence and absence of DO, respectively. Quenching and electron paramagnetic resonance tests verified that both superoxide radicals (O
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bd0774b328776f5f81ac79bd32aa24d https://doi.org/10.1016/j.chemosphere.2022.136321 Zobrazit plný text záznamu Full Text from ScienceDirect