| Abstract | Microbial electrochemical systems (MES) represent an innovative reagent-free technology for in situ remediation of groundwater contaminated by petroleum hydrocarbons. Here we describe the long-term (>160 days) anaerobic treatment of synthetic groundwater containing toluene (25 mg L-1) in a novel laboratory-scale, continuous-flow bioelectrochemical reactor, termed the "bioelectric well". Under optimal operating conditions (i.e., anode potential potentiostatically controlled at +0.2 V vs. SHE and recycle flow-rate set at 75 mL min-1), the observed electrogenic toluene oxidation rate was 67.2 ± 5.7 mg L d-1, a value which is among the highest reported in the literature for laboratory-scale anaerobic treatment systems. Correspondingly, electric current was 5.1 ± 0.1 mA and the Coulombic efficiency (i.e., the yield of toluene conversion into electric current) was 79 ± 7%. |
| Text | 398648 2018 10.1039/c8ew00666k Scopus 2 s2.0 85057429290 ISI Web of Science WOS WOS 000451072500023 bioremediation Anaerobic electrogenic oxidation of toluene in a continuous flow bioelectrochemical reactor Process performance, microbial community analysis, and biodegradation pathways Palma E.; Daghio M.; Espinoza Tofalos A.; Franzetti A.; Cruz Viggi C.; Fazi S.; Petrangeli Papini M.; Aulenta F. Water Research Institute IRSA , National Research Council CNR , Via Salaria km 29, 300, Monterotondo RM , 00015, , Italy; Department of Earth and Environmental Sciences, University of Milano Bicocca, Piazza della Scienza 1, Milan, 20126, , Italy; Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, Rome, 00185, , Italy Microbial electrochemical systems MES represent an innovative reagent free technology for in situ remediation of groundwater contaminated by petroleum hydrocarbons. Here we describe the long term >160 days anaerobic treatment of synthetic groundwater containing toluene 25 mg L 1 in a novel laboratory scale, continuous flow bioelectrochemical reactor, termed the bioelectric well . Under optimal operating conditions i.e., anode potential potentiostatically controlled at 0.2 V vs. SHE and recycle flow rate set at 75 mL min 1 , the observed electrogenic toluene oxidation rate was 67.2 ± 5.7 mg L d 1, a value which is among the highest reported in the literature for laboratory scale anaerobic treatment systems. Correspondingly, electric current was 5.1 ± 0.1 mA and the Coulombic efficiency i.e., the yield of toluene conversion into electric current was 79 ± 7%. 4 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85057429290 origin=inward Anaerobic electrogenic oxidation of toluene in a continuous flow bioelectrochemical reactor Process performance, microbial community analysis.. paper ES WR T 2018 4 2136.pdf Articolo in rivista Royal Society of Chemistry 2053 1419 Environmental science Water research technology Online Environmental science Water research technology Online Environmental science. Environ. Sci. Water Res. Technol PALMA ENZA stefano.fazi FAZI STEFANO federico.aulenta AULENTA FEDERICO carolina.cruzviggi CRUZ VIGGI CAROLINA |
