화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.19, No.2, 571-579, March, 2013
DOI10.1016/j.jiec.2012.09.010  Export Citation
Electrochemical oxidation of methyl orange azo dye at pilot flow plant using BDD technology
Cecilia Ramırez, Adriana Saldan˜a, Berenice Herna´ndez, Roberto Acero, Ricardo Guerra, Sergi Garcia-Segura1, Enric Brillas1, and Juan M. Peralta-Herna´ndez†
  • Centro de Innovacio´n Aplicada en Tecnologı´as Competitivas (CIATEC), Investigacio´n Ambiental, Omega-201, Fraccionamiento Industrial Delta, 37545 Leo´n, Guanajuato, Mexico
  • 1Laboratori d’Electroquı´mica dels Materials i del Medi Ambient, Departament de Quı´mica Fı´sica, Facultat de Quı´mica, Universitat de Barcelona, Martı´ i Franque´s 1-11, 08028 Barcelona, Spain
E-mail:
Solutions of methyl orange azo dye were degraded by electrochemical oxidation using a 3 L flow plant with a boron-doped diamond (BDD)/stainless steel cell operating at constant current density, ambient temperature and liquid flow rate of 12 L min^(-1). A 23 factorial design considering the applied current density, azo dye concentration and electrolysis time as variable independents was used to analyze the process by response surface methodology. LC-MS analysis revealed the formation of seven oxidation products from the cleavage of the -N=N- group of the dye, followed by deamination, formation of a nitro group and/or desulfonation of the resulting aromatics.
Keywords:BDD;Electrochemical oxidation;Methyl orange;Oxidation products;Response surface methodology;Wastewater treatment
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