Electrochemical degradation of bisphenol A on different anodes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1968-1976
Journal / PublicationWater Research
Issue number7
Publication statusPublished - Apr 2009
Externally publishedYes


Laboratory experiments were carried out on the kinetics, pathways and mechanisms of electrochemical (EC) degradation of bisphenol A (BPA) on four types of anodes, Ti/boron-doped diamond (BDD), Ti/Sb-SnO2, Ti/RuO2 and Pt. There were considerable differences among the anodes in their effectiveness and performance of BPA electrolysis. BPA was readily destructed at the Ti/Sb-SnO2 and Ti/BDD anodes, the Pt anode had a moderate ability to remove BPA, and the Ti/RuO2 anode was incapable of effectively oxidising BPA. The intermediate products of EC degradation of BPA were detected and quantified by high-performance liquid chromatography (HPLC), and a general BPA degradation pathway was proposed based on the analytical results. It was suggested that {radical dot}OH radicals produced by water electrolysis attacked BPA to form hydroxylated BPA derivatives that were then transformed into one-ring aromatic compounds. These compounds underwent ring breakage, which led to the formation of aliphatic acids that were eventually mineralised by electrolysis to CO2. Compared to the Pt and Ti/RuO2 anodes, the Ti/Sb-SnO2 and Ti/BDD anodes were found to have higher oxygen evolution potentials and higher anodic potentials for BPA electrolysis under the same current condition. However, the stability and durability of the Ti/Sb-SnO2 anode still needs to be greatly improved for actual application. In comparison, with its high durability and good reactivity for organic oxidation, the Ti/BDD anode appears to be the more promising one for the effective EC treatment of BPA and similar endocrine disrupting chemical (EDC) pollutants. © 2009 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Anode, Bisphenol A (BPA), Boron-doped diamond (BDD), Electrochemistry, Hydroxyl radical, Wastewater treatment

Bibliographic Note

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Citation Format(s)

Electrochemical degradation of bisphenol A on different anodes. / Cui, Yu-hong; Li, Xiao-yan; Chen, Guohua.
In: Water Research, Vol. 43, No. 7, 04.2009, p. 1968-1976.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review