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Anode potential selection for sulfide removal in contaminated marine sediments

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Abstract
Sulfate reducing microorganisms are typically involved in hydrocarbon biodegradation in the sea sediment, with their metabolism resulting in the by-production of toxic sulfide. In this context, it is of utmost importance identifying the optimal value for anodic potential which ensures efficient toxic sulfide removal. Along this line, in this study the (bio)electrochemical removal of sulfide was tested at anodic potentials of - 205 mV, + 195 mV and + 300 mV (vs Ag/AgCl), also in the presence of a pure culture of the sulfur-oxidizing bacterium Desulfobulbus propionicus. Current production, sulfide concentration and sulfate concentration were monitored over time. At the end of the experiment sulfur deposition on the electrodes and the microbial communities were characterized by SEM-EDS and by next generation sequencing of the 16S rRNA gene respectively. Results confirmed that current production was linked to sulfide removal and D. propionicus promoted back oxidation of deposited sulfur to sulfate. The highest electron recovery was observed at + 195 mV vs Ag/AgCl, and the lowest sulfur deposition was obtained at - 205 mV vs Ag/AgCl anode polarization.
Keywords
Sulfide oxidation, Bioelectrochemical systems, Desulfobulbus propionicus, INORGANIC SULFUR-COMPOUNDS, ELECTRON-TRANSFER, OIL-SPILLS, OXIDATION, HYDROCARBONS, DEGRADATION, BIODEGRADATION, SEQUENCES, SNORKEL

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Chicago
Daghio, Matteo, Eleni Vaiopoulou, Federico Aulenta, Angela Sherry, Ian Head, Andrea Franzetti, and Korneel Rabaey. 2018. “Anode Potential Selection for Sulfide Removal in Contaminated Marine Sediments.” Journal of Hazardous Materials 360: 498–503.
APA
Daghio, M., Vaiopoulou, E., Aulenta, F., Sherry, A., Head, I., Franzetti, A., & Rabaey, K. (2018). Anode potential selection for sulfide removal in contaminated marine sediments. JOURNAL OF HAZARDOUS MATERIALS, 360, 498–503.
Vancouver
1.
Daghio M, Vaiopoulou E, Aulenta F, Sherry A, Head I, Franzetti A, et al. Anode potential selection for sulfide removal in contaminated marine sediments. JOURNAL OF HAZARDOUS MATERIALS. 2018;360:498–503.
MLA
Daghio, Matteo, Eleni Vaiopoulou, Federico Aulenta, et al. “Anode Potential Selection for Sulfide Removal in Contaminated Marine Sediments.” JOURNAL OF HAZARDOUS MATERIALS 360 (2018): 498–503. Print.
@article{8579821,
  abstract     = {Sulfate reducing microorganisms are typically involved in hydrocarbon biodegradation in the sea sediment, with their metabolism resulting in the by-production of toxic sulfide. In this context, it is of utmost importance identifying the optimal value for anodic potential which ensures efficient toxic sulfide removal. Along this line, in this study the (bio)electrochemical removal of sulfide was tested at anodic potentials of - 205 mV, + 195 mV and + 300 mV (vs Ag/AgCl), also in the presence of a pure culture of the sulfur-oxidizing bacterium Desulfobulbus propionicus. Current production, sulfide concentration and sulfate concentration were monitored over time. At the end of the experiment sulfur deposition on the electrodes and the microbial communities were characterized by SEM-EDS and by next generation sequencing of the 16S rRNA gene respectively. Results confirmed that current production was linked to sulfide removal and D. propionicus promoted back oxidation of deposited sulfur to sulfate. The highest electron recovery was observed at + 195 mV vs Ag/AgCl, and the lowest sulfur deposition was obtained at - 205 mV vs Ag/AgCl anode polarization.},
  author       = {Daghio, Matteo and Vaiopoulou, Eleni and Aulenta, Federico and Sherry, Angela and Head, Ian and Franzetti, Andrea and Rabaey, Korneel},
  issn         = {0304-3894},
  journal      = {JOURNAL OF HAZARDOUS MATERIALS},
  keywords     = {Sulfide oxidation,Bioelectrochemical systems,Desulfobulbus propionicus,INORGANIC SULFUR-COMPOUNDS,ELECTRON-TRANSFER,OIL-SPILLS,OXIDATION,HYDROCARBONS,DEGRADATION,BIODEGRADATION,SEQUENCES,SNORKEL},
  language     = {eng},
  pages        = {498--503},
  title        = {Anode potential selection for sulfide removal in contaminated marine sediments},
  url          = {http://dx.doi.org/10.1016/j.jhazmat.2018.08.016},
  volume       = {360},
  year         = {2018},
}

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