Ghent University Academic Bibliography

Advanced

Role of sulfur during acetate oxidation in biological anodes

Paritam K Dutta, Jürg Keller, ZhiGuo Yuan, René A Rozendal and Korneel Rabaey UGent (2009) ENVIRONMENTAL SCIENCE & TECHNOLOGY. 43(10). p.3839-3845
abstract
The treatment of wastewater containing sulfides in bioelectrochemical systems (BES) causes deposition of sulfur on the anode as a result of a solely electrochemical process. In this study, we investigate whether microorganisms can use this sulfur, rather than the anode or soluble sulfate, as an electron acceptor for the oxidation of acetate. Our results indicate that microorganisms use electrode posited sulfur as preferable electron acceptor over the anode and sulfate and produce sulfide irrespective of electrochemical conditions. Bioelectrochemical and biological sulfide generation pathways were studied under different electrochemical conditions. The obtained results show that the sulfide generation rate at open circuit condition (anode potential -235 +/- 5 mV versus standard hydrogen electrode,SHE)was higher in comparison to the electrochemical sulfide generation even at a lower potential of -275 mV (vs SHE), confirming that sulfide is produced through biological processes without any current generation. However, during closed circuit operation, the overall Coulombic efficiency (97% +/- 2%) is not affected as the produced sulfide (originating from the reduction of deposited sulfur) is spontaneously reoxidized to sulfur when a favorable potential is maintained. This confirms the mediator role of sulfur during acetate oxidation in BES. A diagrammatic representation of the mechanism is proposed to characterize the interactions between acetate oxidation and sulfur conversions on the anode.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ELECTRICITY-GENERATION, MICROBIAL FUEL-CELLS, ELECTRON-TRANSFER, SULFIDE, REMOVAL, ENERGY
journal title
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Environ. Sci. Technol.
volume
43
issue
10
pages
3839 - 3845
Web of Science type
Article
Web of Science id
000266046700069
JCR category
ENVIRONMENTAL SCIENCES
JCR impact factor
4.63 (2009)
JCR rank
7/178 (2009)
JCR quartile
1 (2009)
ISSN
0013-936X
DOI
10.1021/es803682k
language
English
UGent publication?
no
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2009264
handle
http://hdl.handle.net/1854/LU-2009264
date created
2012-01-31 11:36:02
date last changed
2016-12-19 15:46:43
@article{2009264,
  abstract     = {The treatment of wastewater containing sulfides in bioelectrochemical systems (BES) causes deposition of sulfur on the anode as a result of a solely electrochemical process. In this study, we investigate whether microorganisms can use this sulfur, rather than the anode or soluble sulfate, as an electron acceptor for the oxidation of acetate. Our results indicate that microorganisms use electrode posited sulfur as preferable electron acceptor over the anode and sulfate and produce sulfide irrespective of electrochemical conditions. Bioelectrochemical and biological sulfide generation pathways were studied under different electrochemical conditions. The obtained results show that the sulfide generation rate at open circuit condition (anode potential -235 +/- 5 mV versus standard hydrogen electrode,SHE)was higher in comparison to the electrochemical sulfide generation even at a lower potential of -275 mV (vs SHE), confirming that sulfide is produced through biological processes without any current generation. However, during closed circuit operation, the overall Coulombic efficiency (97\% +/- 2\%) is not affected as the produced sulfide (originating from the reduction of deposited sulfur) is spontaneously reoxidized to sulfur when a favorable potential is maintained. This confirms the mediator role of sulfur during acetate oxidation in BES. A diagrammatic representation of the mechanism is proposed to characterize the interactions between acetate oxidation and sulfur conversions on the anode.},
  author       = {Dutta, Paritam K and Keller, J{\"u}rg and Yuan, ZhiGuo and Rozendal, Ren{\'e} A and Rabaey, Korneel},
  issn         = {0013-936X},
  journal      = {ENVIRONMENTAL SCIENCE \& TECHNOLOGY},
  keyword      = {ELECTRICITY-GENERATION,MICROBIAL FUEL-CELLS,ELECTRON-TRANSFER,SULFIDE,REMOVAL,ENERGY},
  language     = {eng},
  number       = {10},
  pages        = {3839--3845},
  title        = {Role of sulfur during acetate oxidation in biological anodes},
  url          = {http://dx.doi.org/10.1021/es803682k},
  volume       = {43},
  year         = {2009},
}

Chicago
Dutta, Paritam K, Jürg Keller, ZhiGuo Yuan, René A Rozendal, and Korneel Rabaey. 2009. “Role of Sulfur During Acetate Oxidation in Biological Anodes.” Environmental Science & Technology 43 (10): 3839–3845.
APA
Dutta, P. K., Keller, J., Yuan, Z., Rozendal, R. A., & Rabaey, K. (2009). Role of sulfur during acetate oxidation in biological anodes. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(10), 3839–3845.
Vancouver
1.
Dutta PK, Keller J, Yuan Z, Rozendal RA, Rabaey K. Role of sulfur during acetate oxidation in biological anodes. ENVIRONMENTAL SCIENCE & TECHNOLOGY. 2009;43(10):3839–45.
MLA
Dutta, Paritam K, Jürg Keller, ZhiGuo Yuan, et al. “Role of Sulfur During Acetate Oxidation in Biological Anodes.” ENVIRONMENTAL SCIENCE & TECHNOLOGY 43.10 (2009): 3839–3845. Print.