Electrochemical regeneration of sulfur loaded electrodes

Paritam, K. Dutta, Rozendal, Rene A., Yuan, Zhiguo, Korneel, Rabaey and Keller, Jurg (2009) Electrochemical regeneration of sulfur loaded electrodes. Electrochemistry Communications, 11 7: 1437-1440. doi:10.1016/j.elecom.2009.05.024


Author Paritam, K. Dutta
Rozendal, Rene A.
Yuan, Zhiguo
Korneel, Rabaey
Keller, Jurg
Title Electrochemical regeneration of sulfur loaded electrodes
Journal name Electrochemistry Communications   Check publisher's open access policy
ISSN 1388-2481
Publication date 2009-07
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.elecom.2009.05.024
Volume 11
Issue 7
Start page 1437
End page 1440
Total pages 4
Editor R.G. Compton
Place of publication United States
Publisher Elsevier
Collection year 2010
Language eng
Subject C1
Abstract Electrochemical oxidation of sulfide is a promising technique for its removal from wastewaters. Generally, the main product of this oxidation reaction is elemental sulfur. The latter deposits as a solid on the electrode and deactivates it. Therefore, an efficient and effective regeneration technique of sulfur loaded electrodes is required for the practical implementation of this technology. Here we demonstrate a method for in situ reduction of electrodeposited sulfur on carbon fibre electrodes to sulfide/polysulfides, at low energy input. The intermediary coulombic efficiency (CE) values strongly depend on pH and buffer capacity of the solution. These values were recorded up to 435 ± 5% due to simultaneous chemical dissolution of sulfur to polysulfides under alkaline conditions. This process demonstrates the potential for continuously removing dissolved sulfide from wastewaters at an anode as sulfur and recovering the deposited sulfur based on regular switching between anodic sulfide oxidation and cathodic sulfur reduction. © 2009 Elsevier B.V. All rights reserved.
Keyword Alkaline conditions
Electrochemical regeneration
Polysulfide
Dissolved sulfide
Wastewater treatment
Buffer capacity
Carbon fibre electrodes
Practical implementation
Chemical dissolution
Oxidation reactions
Coulombic efficiency
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Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Available online 18 May 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 29 Mar 2010, 15:10:31 EST by Hong Lee on behalf of Advanced Water Management Centre