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6CCVD Research

ANODIC DEGRADATION OF CAFFEINE UNDER DIFFERENT OPERATING CONDITIONS

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2015-01-01
JournalFresenius environmental bulletin
AuthorsTe-San Chen, Yu-Syuan Chen, Tsai RenWei, Huang KuoLin
Citations6

Abstract

Section titled ā€œAbstractā€

ABSTRACT This study investigates the electrochemical oxidation of caffeine under various operating parameters (current density, initial caffeine concentration, electrode material (BDD, PbO 2 , and Pt), and sample matrix). According to cy-clic voltammetric analysis, the oxidation of caffeine on BDD was found to be electrochemically irreversible. The degradation efficiency of caffeine increased with increas-ing current density but noticeably decreased as initial caf-feine concentration increased. Superior to the PbO 2 and Pt electrodes for caffeine degradation and total organic car-bon abatement, the BDD anode exhibited the highest max-imum value of caffeine mineralization current efficiency. At 200 mA/cm 2 and 25Ā°C, the pseudo-first-order rate con-stants of caffeine oxidation were 7.6Ɨ10 -4 and 6.9Ɨ10 -4 1/s in 0.1 M Na 2 SO 4 solution and secondary (municipal) wastewater treatment plant effluent, respectively. KEYWORDS: Boron-doped diamond electrode; Caffeine; Electro-degradation; Mineralization current efficiency

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

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