Nanostructured ZnO-TiO₂ thin film oxide as anode material in electrooxidation of organic pollutants. Application to the removal of dye Amido black 10B from water

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• 作者：Sana El-Kacemi ; Hicham Zazou ; Nihal Oturan…
• 关键词：Amido black 10B ; Nanostructured ZnO ; TiO2 ; Electrooxidation ; Electro ; Fenton ; Rate constant ; Mineralization
• 刊名：Environmental Science and Pollution Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：24
• 期：2
• 页码：1442-1449
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment, general; Environmental Chemistry; Ecotoxicology; Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Waste Water Technology / Water Pollution Control / Water M
• 出版者：Springer Berlin Heidelberg
• ISSN：1614-7499
• 卷排序：24

文摘

Electrochemical oxidative degradation of diazo dye Amido black 10B (AB10B) as model pollutant in water has been studied using nanostructured ZnO-TiO₂ thin films deposited on graphite felt (GrF) substrate as anode. The influence of various operating parameters, namely the current intensity, the nature and concentration of catalyst, the nature of electrode materials (anode/cathode), and the adsorption of dye and ambient light were investigated. It was found that the oxidative degradation of AB10B followed pseudo first-order kinetics. The optimal operating conditions for the degradation of 0.12 mM (74 mg L−1) dye concentration and mineralization of its aqueous solution were determined as GrF-ZnO-TiO₂ thin film anode, 100 mA current intensity, and 0.1 mM Fe2+ (catalyst) concentration. Under these operating conditions, discoloration of AB10B solution was reached at 60 min while 6 h treatment needed for a mineralization degree of 91 %. Therefore, this study confirmed that the electrochemical process is effective for the degradation of AB10B in water using nanostructured ZnO-TiO₂ thin film anodes.