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Degradation of azo dye C.I. Acid Red 18 in aqueous solution by ozone-electrolysis process
J. Basiri Parsa,M. Golmirzaei,M. Abbasi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
In this paper, the degradation of azo dye C.I. Acid Red 18 (AR18) with initial concentration of 100 mg L-1 in aqueous solution by ozone-electrolysis process (OEP) as hybrid method of advance oxidation processwas investigated. All experiments were performed in a 450 mL mixed semi-batch reactor to obtain theoptimal conditions. The effects of NaCl concentration as supporting electrolyte, current density andinitial pH on the removal efficiency of AR18 solution were investigated. The efficiency of color and TOCremoval were compared as functional of degradation and decolorization of AR18. The results of UV/visspectra showed that the AR18 structures were destroyed under ozone-electrolysis reaction. Thisinvestigation revealed ozone-electrolysis presents good efficiency for both solution decolorization andtotal organic carbon (TOC) removal. Results of experiments indicated that ozone-electrolysis process hasa synergistic effect on decolorization rate of AR18.