文章基本信息

标题：ANODIC DEGRADATION OF CAFFEINE UNDER DIFFERENT OPERATING CONDITIONS
本地全文：下载
作者：Ren-Wei Tsai ; Te-San Chen ; Yu-Syuan Chen 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2015
卷号：24
期号：3
页码：800-809
语种：English
出版社：PSP Publishing
摘要：This study investigates the electrochemical oxidation of caffeine under various operating parameters (current density, initial caffeine concentration, electrode material (BDD, PbO2, and Pt), and sample matrix). According to cyclic voltammetric analysis, the oxidation of caffeine on BDD was found to be electrochemically irreversible. The degradation efficiency of caffeine increased with increasing current density but noticeably decreased as initial caffeine concentration increased. Superior to the PbO2 and Pt electrodes for caffeine degradation and total organic carbon abatement, the BDD anode exhibited the highest maximum value of caffeine mineralization current efficiency. At 200 mA/cm2 and 25°C, the pseudo-first-order rate constants of caffeine oxidation were 7.6×10-4 and 6.9×10-4 1/s in 0.1 M Na2SO4 solution and secondary (municipal) wastewater treatment plant effluent, respectively.
关键词：Boron-doped diamond electrode; Caffeine; Electrodegradation; Mineralization current efficiency