Electrochemical sulfide oxidation from domestic wastewater using mixed metal-coated titanium electrodes

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

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Author(s)

  • Ilje Pikaar
  • René A. Rozendal
  • Zhiguo Yuan
  • Jürg Keller
  • Korneel Rabaey

Detail(s)

Original languageEnglish
Pages (from-to)5381-5388
Journal / PublicationWater Research
Volume45
Issue number17
Publication statusPublished - 1 Nov 2011
Externally publishedYes

Abstract

Hydrogen sulfide generation is a major issue in sewer management. A novel method based on electrochemical sulfide oxidation was recently shown to be highly effective for sulfide removal from synthetic and real sewage. Here, we compare the performance of five different mixed metal oxide (MMO) coated titanium electrode materials for the electrochemical removal of sulfide from domestic wastewater. All electrode materials performed similarly in terms of sulfide removal, removing 78±5%, 77±1%, 85±4%, 84±1%, and 83±2% at a current density of 10mA/cm2 using Ta/Ir, Ru/Ir, Pt/Ir, SnO2 and PbO2, respectively. Elevated chloride concentrations, often observed in coastal areas, did not entail any significant difference in performance. Independent of the electrode material used, sulfide oxidation by in situ generated oxygen was the predominant reaction mechanism. Passivation of the electrode surface by deposition of elemental sulfur did not occur. However, scaling was observed in the cathode compartment. This study shows that all the MMO coated titanium electrode materials studied are suitable anodic materials for sulfide removal from wastewater. Ta/Ir and Pt/Ir coated titanium electrodes seem the most suitable electrodes since they possess the lowest overpotential for oxygen evolution, are stable at low chloride concentration and are already used in full scale applications. © 2011 Elsevier Ltd.

Research Area(s)

  • Electrochemical oxidation, Oxygen generation, Sewer, Sulfide oxidation

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 sulfide oxidation from domestic wastewater using mixed metal-coated titanium electrodes. / Pikaar, Ilje; Rozendal, René A.; Yuan, Zhiguo et al.
In: Water Research, Vol. 45, No. 17, 01.11.2011, p. 5381-5388.

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