Electrochemical degradation of Musk ketone in aqueous solutions using a novel porous Ti/SnO₂-Sb₂O₃/PbO₂ electrodes

详细信息    查看全文

• 作者：Wei Zhao^a ; ^b ; Juntao Xing^b ; Donghui Chen^b ; ^{chendhsit@163.com" class="auth_mail" title="E-mail the corresponding author} ; Dongyuan Jin^b ; Jia Shen^b
• 关键词：Electrochemical degradation ; Persistent organic pollutants ; Musk ketone ; Porous Ti/SnO2-Sb2O3/PbO2
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2016
• 出版时间：15 August 2016
• 年：2016
• 卷：775
• 期：Complete
• 页码：179-188
• 全文大小：2603 K

文摘

This paper investigates the electrochemical degradation of Musk ketone (MK) in aqueous solution with a novel porous Ti/SnO₂-Sb₂O₃/PbO₂ electrode. The influence of electro-deposition preparation parameters on the surface structure and crystal characteristics of porous PbO₂ electrode was systematically investigated by SEM and XRD in detail, including electro-deposition time, current density and deposition temperature. Compared with the conventional plate PbO₂ electrode, the novel porous PbO₂ had a higher stability, safety and removal efficiency for Musk ketone. Besides, the optimal degradation conditions were obtained by studying the effecting of different factors, such as electrolyte concentrations (0–0.12 mol L^− 1), current densities (10–50 mA cm^− 2), initial pH (3 − 11) and initial Musk ketone concentrations (10–90 mg L^− 1). The results showed that the removal rates of Musk ketone reached 99.93% after 120 min electrolysis at initial 50 mg L^− 1 Musk ketone at constant current density of 40 mA cm^− 2 with 0.06 mol L^− 1 Na₂SO₄ supporting electrolyte. In addition, cyclic voltammograms tests indicated that the degradation of Musk ketone was mainly achieved via indirect electrochemical oxidation mediated by hydroxyl radical. Moreover, a possible electrochemical degradation pathway for Musk ketone was deduced based on the intermediates identified by GC–MS methods.