| Title | Enrichment of Dehalococcoides mccartyi spp. from a municipal activated sludge during AQDS-mediated bioelectrochemical dechlorination of 1,2-dichloroethane to ethene |
| Abstract | The application of bioelectrochemical systems (BES) for the treatment of chloroethanes has been so far limited, in spite of the high frequency that these contaminants are detected at contaminated sites. This work studied the biodegradation of 1,2-dichloroethane (1,2-DCA) in a lab-scale BES, inoculated with a municipal activated sludge and operated under a range of conditions, spanning from oxidative to reductive, both in the presence and in the absence of the humic acid analogue anthraquinone-2,6-disulfonate (AQDS) as a redox mediator. The results showed stable dechlorination of 1,2-DCA to ethene (up to 65 ± 5 ?mol/L d), when the BES was operated at a set potential of -300 mV vs. SHE, in the presence of AQDS. Sustained filled-and-draw operation resulted in the enrichment of Dehalococcoides mccartyi. The results of this work provide new insights into the applicability of BES for groundwater remediation and the potential interaction between biogeochemistry and 1,2-DCA in humics-rich contaminated aquifers. |
| Source | Bioresource technology 214, pp. 426–431 |
| Keywords | 1,2-DichloroethaneActivated sludgeAnthraquinone-2,6-disulfonate (AQDS)Bioelectrochemical systemsDehalococcoides mccartyiRedox mediator |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2016.04.129 |
| Authors | Leitão, Patrícia; Rossetti, Simona; Danko, Anthony S.; Nouws, Henri; Aulenta, Federico |
| Text | 372295 2016 10.1016/j.biortech.2016.04.129 Scopus 2 s2.0 84964905941 1,2 Dichloroethane Activated sludge Anthraquinone 2,6 disulfonate AQDS Bioelectrochemical systems Dehalococcoides mccartyi Redox mediator Enrichment of Dehalococcoides mccartyi spp. from a municipal activated sludge during AQDS mediated bioelectrochemical dechlorination of 1,2 dichloroethane to ethene Leitão, Patricia; Rossetti, Simona; Danko, Anthony S.; Nouws, Henri; Aulenta, Federico Consiglio Nazionale delle Ricerche; Universidade do Porto; Instituto Superior de Engenharia do Porto The application of bioelectrochemical systems BES for the treatment of chloroethanes has been so far limited, in spite of the high frequency that these contaminants are detected at contaminated sites. This work studied the biodegradation of 1,2 dichloroethane 1,2 DCA in a lab scale BES, inoculated with a municipal activated sludge and operated under a range of conditions, spanning from oxidative to reductive, both in the presence and in the absence of the humic acid analogue anthraquinone 2,6 disulfonate AQDS as a redox mediator. The results showed stable dechlorination of 1,2 DCA to ethene up to 65 ± 5 mol/L d , when the BES was operated at a set potential of 300 mV vs. SHE, in the presence of AQDS. Sustained filled and draw operation resulted in the enrichment of Dehalococcoides mccartyi. The results of this work provide new insights into the applicability of BES for groundwater remediation and the potential interaction between biogeochemistry and 1,2 DCA in humics rich contaminated aquifers. 214 Published version http //www.scopus.com/record/display.url eid=2 s2.0 84964905941 origin=inward Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. simona.rossetti ROSSETTI SIMONA federico.aulenta AULENTA FEDERICO |
