Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes

Moura, Dayanne Chianca de; Brito, Chrystiane do Nascimento; Quiroz, Marco Antonio; Pergher, Sibele Berenice Castellã; Martinez-Huitle, Carlos Alberto

Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes

Página do item simplificado Estatísticas

dc.contributor.author	Moura, Dayanne Chianca de
dc.contributor.author	Brito, Chrystiane do Nascimento
dc.contributor.author	Quiroz, Marco Antonio
dc.contributor.author	Pergher, Sibele Berenice Castellã
dc.contributor.author	Martinez-Huitle, Carlos Alberto
dc.date.accessioned	2020-07-15T03:14:53Z
dc.date.available	2020-07-15T03:14:53Z
dc.date.issued	2015-12
dc.description.resumo	In this work, the role of chloride with respect to the oxygen evolution reaction by using BDD and Pt/Ti anodes was investigated to understand the performance of both anodes for the electrochemical treatment of a real sample of wastewater, with lower organic load, generated at Federal University of Rio Grande do Norte. Bulk experiments were performed under real discharged effluent conditions (pH and conductivity) in order to verify the applicability of direct and mediated electrochemical oxidation by applying 2.5 and 5.0 mA cm−2. Results clearly showed that, a partial elimination of chemical oxygen demand (COD) was achieved, depending on applied current density. Using Pt/Ti, by applying 2.5 and 5.0 mA cm−2, COD removal efficiencies of 25.2% and 30.49% were obtained. Under the same conditions, a minor COD removal was achieved by using BDD electrode. However, the removal efficiencies were improved when Cl-mediated oxidation approach was employed, obtaining 63.7% and 60% for Pt/Ti by applying 2.5 and 5.0 mA cm−2, respectively; while for BDD electrode, COD removals were about 15% and 47%, under the same conditions. These figures are in agreement with the polarization curves obtained, where it was possible to confirm that the concentration of halide in solution increases the importance of Cl2/oxy-chloro radicals system depending on the electrocatalytic material and this behavior plays an important role in relation with the oxygen evolution reaction, influencing on the efficiency of electrochemical approach adopted	pt_BR
dc.identifier.citation	MOURA, Dayanne Chianca de; BRITO, Chrystiane do Nascimento; QUIROZ, Marco Antonio; PERGHER, Sibele Berenice Castellã; MARTINEZ-HUITLE, Carlos A. Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes. Journal Of Water Process Engineering, [s.l.], v. 8, p. 31-36, dez. 2015. ISSN 2214-7144. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S2214714414001299. Acesso em 14 jul. 2020. https://doi.org/10.1016/j.jwpe.2014.11.005	pt_BR
dc.identifier.doi	10.1016/j.jwpe.2014.11.005
dc.identifier.issn	2214-7144
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29639
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Oxygen evolution reaction	pt_BR
dc.subject	Polarization curves	pt_BR
dc.subject	Diamond electrode	pt_BR
dc.subject	Real effluent	pt_BR
dc.subject	Hydroxyl radicals	pt_BR
dc.subject	Active chlorine	pt_BR
dc.title	Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes	pt_BR
dc.type	article	pt_BR