Fundamentals and advances on the mechanisms of electrochemical generation of persulfate and sulfate radicals in medium

Autor(es)

Araujo, Karla C. F. ; dos Santos, Elisama, V ; Nidheesh, Puthiya, V ; Martinez-Huitle, Carlos A.

• Tipo de documento: Artigo Científico
• Fonte: CURRENT OPINION IN CHEMICAL ENGINEERING; v. 38, p. 12-pg., 2022-10-07.

Resumo

Electrochemical advanced oxidation processes (EAOPs) generating homogeneous or heterogeneous hydroxyl radicals have received great attention because these represent a real solution to fulfill Sustainable Development Goal 6 (SDG6), however, persulfate/sulfate-radical-based EAOPs (S2O82-/SO4 center dot--EAOPs) have been widely investigated during the past decade, as an innovative and efficient electrochemical SDG6 solution for degrading refractory organic contaminants and waterborne agents. In this minireview, the state-of-the-art of the electrocatalytic production of S2O82- and SO4 center dot- is comprehensively analyzed and classified, and then, the current progress on the research of the mechanisms related to the electrosynthesis and electroactivation is summarized. Several viewpoints and controversies on the mechanisms are given as well as the developments that might be addressed in future, are highlighted in the end. Overall, further developments on the S2O82-/SO4 center dot--EAOPs depend on design, nature, and high -efficiency electrocatalysts' composition to achieve an efficient reaction-process control as well as a real applicability (as in situ or ex situ approaches) and boosting the reaction systems. (AU)

• Processo FAPESP: 19/13113-4 - Processos foto (eletro) catalíticos e fotoeletro-fenton para eliminar contaminantes emergentes de águas de rejeito industriais
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático