Electrochemical degradation of bisphenol A on different anodes

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

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1968-1976
Journal / PublicationWater Research
Volume43
Issue number7
Publication statusPublished - Apr 2009
Externally publishedYes

Abstract

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

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

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