Nature, Mechanisms and Reactivity of Electrogenerated Reactive Species at Thin-Film Boron-Doped Diamond (BDD) Electrodes During Electrochemical Wastewater Treatment

Author(s)

Ganiyu, Soliu O. ^{[1, 2]} ; Martinez-Huitle, Carlos A. ^[1]

Affiliation

^[1] Univ Fed Rio Grande do Norte, Inst Chem, BR-59078970 Natal, RN - Brazil

^[2] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2 - Canada

• Document type: Review article
• Source: CHEMELECTROCHEM; v. 6, n. 9, p. 2379-2392, MAY 2 2019.
• Web of Science Citations: 2

Abstract

Electrooxidation of hazardous organic pollutants contaminating wastewater using thin-film boron-doped diamond (BDD) electrodes is an efficient and well-studied treatment technique. In this review, the three main reactive species, namely: reactive oxygen, chlorine and sulfate species, which can be electrogenerated and then participate in the oxidation processes during electrooxidative wastewater treatment using BDD electrodes, are discussed. The main factors affecting the nature and quantity of the electrogenerated reactive species, specifically the composition of the BDD electrode (doping level and sp(3)/sp(2) ratio) and the operating parameters (working current density and composition of water matrix been electrolyzed) were explained with relative examples. Extensive discussion on mode and reactivity of the three reactive species with organic pollutants during electrooxidation was provided and the future perspectives and direction of research on reactive species generated on BDD electrodes were also discussed. (AU)

• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants