| Title | Bioelectrochemically-assisted reductive dechlorination of 1,2-dichloroethane by a Dehalococcoides-enriched microbial culture |
| Abstract | The aim of this study was to verify the possibility to use a polarized graphite electrode as an electron donor for the reductive dechlorination of 1,2-dichloroethane, an ubiquitous groundwater contaminant. The rate of 1,2-DCA dechlorination almost linearly increased by decreasing the set cathode potential over a broad range of set cathode potentials (i.e., from -300 mV to -900 mV vs. the standard hydrogen electrode). This process was primarily dependent on electrolytic H-2 generation. On the other hand, reductive dechlorination proceeded (although quite slowly) with a very high Coulombic efficiency (near 70%) at a set cathode potential of -300 mV, where no H2 production occurred. Under this condition, reductive dechlorination was likely driven by direct electron uptake from the surface of the polarized electrode. Taken as a whole, this study further extends the range of chlorinated contaminants which can be treated with bioelectrochemical systems. (C) 2015 Elsevier Ltd. All rights reserved. |
| Source | Bioresource technology 195, pp. 78–82 |
| Keywords | Bioelectrochemical dechlorination12-DichloroethaneReductive dechlorinationMicrobial biocathode |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2015.06.027 |
| Authors | Leitao Patricia; Rossetti Simona; Nouws Henri P. A.; Danko Anthony S.; Majone Mauro; Aulenta Federico |
| Text | 339913 2015 10.1016/j.biortech.2015.06.027 ISI Web of Science WOS 000359444600012 Bioelectrochemical dechlorination 1 2 Dichloroethane Reductive dechlorination Microbial biocathode Bioelectrochemically assisted reductive dechlorination of 1,2 dichloroethane by a Dehalococcoides enriched microbial culture Leitao Patricia; Rossetti Simona; Nouws Henri P. A.; Danko Anthony S.; Majone Mauro; Aulenta Federico Water Research Institute IRSA , National Research Council CNR , Via Salaria km. 29.300, 00015 Monterotondo RM , Italy; CERENA, Department of Mining Engineering, University of Porto, Rua Dr. Roberto Frias, 4200 465 Porto, Portugal; REQUIMTE/LAQV, Institute of Engineering of Porto, Polytechnic Institute of Porto, Rua Dr. Antonio Bernardino de Almeida, 431, 4200 072 Porto, PortugalK; Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy The aim of this study was to verify the possibility to use a polarized graphite electrode as an electron donor for the reductive dechlorination of 1,2 dichloroethane, an ubiquitous groundwater contaminant. The rate of 1,2 DCA dechlorination almost linearly increased by decreasing the set cathode potential over a broad range of set cathode potentials i.e., from 300 mV to 900 mV vs. the standard hydrogen electrode . This process was primarily dependent on electrolytic H 2 generation. On the other hand, reductive dechlorination proceeded although quite slowly with a very high Coulombic efficiency near 70% at a set cathode potential of 300 mV, where no H2 production occurred. Under this condition, reductive dechlorination was likely driven by direct electron uptake from the surface of the polarized electrode. Taken as a whole, this study further extends the range of chlorinated contaminants which can be treated with bioelectrochemical systems. C 2015 Elsevier Ltd. All rights reserved. 195 Published version Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. simona.rossetti ROSSETTI SIMONA federico.aulenta AULENTA FEDERICO TA.P07.017.002 Processi Aerobici e di Dealogenazione Riduttiva per la rimozione dei contaminanti dalle acque |
