Optimization of Disperse Blue 3 mineralization by UV-LED/FeTiO3 activated persulfate using response surface methodology

• Autor(a) principal: Silveira, Jefferson E.
• Data de Publicação: 2018
• Outros Autores: Claro, Elis Marina Turini [UNESP], Paz, Wendel S., Oliveira, Adriana S., Zazo, Juan A., Casas, Jose A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• DOI: 10.1016/j.jtice.2017.12.015
• Texto Completo: http://dx.doi.org/10.1016/j.jtice.2017.12.015; http://hdl.handle.net/11449/175707
• topic: Box-Behnken design; FeTiO3; Optimization; Photo-reduction

Response surface methodology based on Box-Behnken design (BBD) was successfully applied for the optimization of the UV-LED/FeTiO3 activated persulfate (PS) process. Disperse Blue 3 (DB3) azo dye oxidation was carried out in a quartz jacketed stirred batch reactor using 405 nm UV at 10 W/m−2 as radiation source. The effects of temperature, catalyst concentration and persulfate dose upon the total organic carbon (TOC) removal were investigated. Optimum operating conditions were found to be: ilmenite: 320 mg/L−1, PS: 1.56 g/L−1 and 67 °C. Under these conditions, 96% mineralization was achieved. Ecotoxicity of the final effluent was evaluated using Aliivibrio fischeri bacteria, finding a negligible toxicity.