Electrochemical oxidation of synthetic tannery wastewater in chloride-free aqueous media

Application of electrochemical reactor divided by cellulosic membrane for optimized simultaneous removal of phenols, chromium, and ammonia from tannery effluents

“…The high alkalinity of the catholyte also facilitated the removal of TPh by mechanisms such as reduction at the cathode surface and coagulation followed by H 2 flotation (Costa et al 2008;K€ orbahti and Tanyolaç 2008). It is expected that other mediators like S 2 O 2 ¡ 8 , H 2 O 2 , and O 3 are also involved in the EOx reactions, although their negligible contribution has been reported by other authors (Murugananthan et al 2008;Costa and Olivi 2009;Costa et al 2010).…”

“…The generation of these inorganic mediators increased with an increase in the current intensity (Mohan, Balasubramanian, and Basha 2007). The non-active Ti/SnO 2 ÀSb electrodes favored the generation of free OH radicals on the anode surface (Costa et al 2010;Sir es and Brillas 2012). The oxidative potential of this mediator is highly dependent on the solution pH and increases with decreasing pH (Polcaro et al 2005).…”

Comparative study on the catalytic electrooxidative abilities of RuOx–PdO–TiO2/Ti and RuOx–PdO/Ti anode

“…The production pathways of chlorine could be shown by Eqs. (5) and (6). According to literature, Eq.…”

“…The electrochemical degradation of wastewater falls into two categories of approaches: direct and indirect electrooxidation. In the direct electrooxidation process, the pollutant was mainly destroyed on the electrode surface owing to hydroxyal radical generation at the anode [6], whereas in the indirect electrooxidation process, mediators such as H 2 O 2 , HClO, or H 2 S 2 O 8 etc. [7,8] are electrochemically generated to carry out the oxidation.…”

Degradação do antibiótico tetraciclina por vários processos em mistura salina

“…(AUERBACH et al, 2007;LEVY;MARSHALL, 2004;SPEER et al, 1992 Alguns estudos têm sido realizados para a degradação eletroquímica de TeC, como já citado na literatura (BELKHEIRI et al, 2011;LIU et al, 2009;MIYATA et al, 2011;WU et al, 2012;ZHANG et al, 2009 RUOTOLO, 2012;. De acordo com a literatura (COSTA et al, 2010;MIWA et al, 2006;BRILLAS, 2009;ROSSI et al, 2008;RAJKUMAR et al, 2005) De acordo com Bonfatti et al (2000), as espécies de oxicloro são intermediárias em reações de desprendimento de cloro, em vez de radicais hidroxila. A presença de íons cloreto parece inibir a reação de evolução de oxigênio, causando um aumento no potencial do ânodo e, portanto, uma maior reatividade de espécies de oxicloro adsorvido a superfície de eletrodo.…”