Electrochemical sulfide removal from synthetic and real domestic wastewater at high current densities

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)2281-2289
Journal / PublicationWater Research
Volume45
Issue number6
Publication statusPublished - Mar 2011
Externally publishedYes

Abstract

Hydrogen sulfide generation is the key cause of sewer pipe corrosion, one of the major issues in water infrastructure. Current abatement strategies typically involve addition of various types of chemicals to the wastewater, which incurs large operational costs. The transport, storage and application of these chemicals also constitute occupational and safety hazards. In this study, we investigated high rate electrochemical oxidation of sulfide at Ir/Ta mixed metal oxide (MMO) coated titanium electrodes as a means to remove sulfide from wastewater. Both synthetic and real wastewaters were used in the experiments. Electrochemical sulfide oxidation by means of indirect oxidation with in-situ produced oxygen appeared to be the main reaction mechanism at Ir/Ta MMO coated titanium electrodes. The maximum obtained sulfide removal rate was 11.8 ± 1.7 g S m-2 projected anode surface h-1 using domestic wastewater at sulfide concentrations of ≥30 mg L-1 or higher. The final products of the oxidation were sulfate, thiosulfate and elemental sulfur. Chloride and acetate concentrations did not entail differences in sulfide removal, nor were the latter two components affected by the electrochemical oxidation. Hence, the use of electrodes to generate oxygen in sewer systems may constitute a promising method for reagent-free removal of sulfide from wastewater. © 2011 Elsevier Ltd.

Research Area(s)

  • Electrochemical systems, In-situ oxygen generation, Sewer corrosion, 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 removal from synthetic and real domestic wastewater at high current densities. / Pikaar, Ilje; Rozendal, René A.; Yuan, Zhiguo et al.
In: Water Research, Vol. 45, No. 6, 03.2011, p. 2281-2289.

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