Acetaminophen degradation by electro-Fenton and photoelectro-Fenton using a double cathode electrochemical cell

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• 作者：Mark Daniel G. de Luna^a ; ^b ; Mersabel L. Veciana^b ; ¹ ; Chia-Chi Su^c ; Ming-Chun Lu^c ; ^{mmclu@mail.chan.edu.tw} ; ^{mclu@ms17.hinet.net}
• 关键词：Acetaminophen ; Electro-Fenton process ; Photoelectro-Fenton process ; Degradation
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 期刊代码：50_03043894
• 类别：ce
• 出版时间：30 May, 2012
• 卷：217-218
• 期：Complete
• 页码：200-207
• 文件大小：600 K

摘要

Acetaminophen is a widely used drug worldwide and is one of the most frequently detected in bodies of water making it a high priority trace pollutant. This study investigated the applicability of the electro-Fenton and photoelectro-Fenton processes using a double cathode electrochemical cell in the treatment of acetaminophen containing wastewater. The Box-Behnken design was used to determine the effects of initial Fe²⁺ and H₂O₂ concentrations and applied current density. Results showed that all parameters positively affected the degradation efficiency of acetaminophen with the initial Fe²⁺ concentration being the most significant parameter for both processes. The acetaminophen removal efficiency for electro-Fenton was 98%and chemical oxygen demand (COD) removal of 43%while a 97%acetaminophen removal and 42%COD removal were observed for the photoelectro-Fenton method operated at optimum conditions. The electro-Fenton process was only able to obtain 19%total organic carbon (TOC) removal while the photoelectro-Fenton process obtained 20%. Due to negligible difference between the treatment efficiencies of the two processes, the electro-Fenton method was proven to be more economically advantageous. The models obtained from the study were applicable to a wide range of acetaminophen concentrations and can be used in scale-ups. Thirteen different types of intermediates were identified and a degradation pathway was proposed.