Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/A0C2AF77-A939-4B6A-B168-40B56D1A2604 | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.nbt.2019.06.004 | - |
| Αναγνωριστικό | https://www.sciencedirect.com/science/article/pii/S1871678418318880 | - |
| Γλώσσα | en | - |
| Μέγεθος | 8 pages | en |
| Τίτλος | Bioelectrochemical treatment of groundwater containing BTEX in a continuous-flow system: substrate interactions, microbial community analysis, and impact of sulfate as a co-contaminant | en |
| Δημιουργός | Palma Enza | en |
| Δημιουργός | Espinoza Tofalos Anna | en |
| Δημιουργός | Daghio Matteo | en |
| Δημιουργός | Franzetti Andrea | en |
| Δημιουργός | Tsiota Panagiota | en |
| Δημιουργός | Τσιωτα Παναγιωτα | el |
| Δημιουργός | Cruz Viggi Carolina | en |
| Δημιουργός | Aulenta Federico | en |
| Δημιουργός | Petrangeli Papini Marco | en |
| Εκδότης | Elsevier | en |
| Περίληψη | Microbial electrochemical technologies (MET) are increasingly being considered for in situ remediation of contaminated groundwater. However, their application potential for the simultaneous treatment of complex mixtures of organic and inorganic contaminants, has been only marginally explored. Here we have analyzed the performance of the ‘bioelectric well’, a previously developed bioelectrochemical reactor configuration, in the treatment of benzene, toluene, ethyl-benzene and xylenes (BTEX) mixtures. Although to different extents, all BTEX were found to be degraded in the bioelectrochemical system, operated using a continuous-flow of groundwater at a hydraulic retention time of 8.8 h, with the graphite anode potentiostatically controlled at +0.200 V vs. the standard hydrogen electrode. In the case of toluene and ethyl-benzene, biodegradation was further confirmed by the GC–MS identification of fumarate-addition metabolites, previously shown to be involved in the activation of these contaminants under anaerobic conditions. Degradation rates were higher for toluene (31.3 ± 1.5 mg/L d) and lower for benzene (6.1 ± 0.3 mg/L d), ethyl-benzene (3.3 ± 0.1 mg/L d), and xylenes (4.5 ± 0.2 mg/L d). BTEX degradation was linked to electric current generation, with coulombic efficiencies falling in the range 53–69%, although methanogenesis also contributed to contaminant degradation. Remarkably, the system also allowed removal of sulfate simultaneously with toluene. Sulfate removal was likely driven by the hydrogen abiotically generated at the cathode. Taken as a whole, these findings highlight the remarkable potential of this innovative reactor configuration for application in a variety of contamination scenarios. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2020-04-06 | - |
| Ημερομηνία Δημοσίευσης | 2019 | - |
| Θεματική Κατηγορία | BTEX | en |
| Θεματική Κατηγορία | Geobacter | en |
| Θεματική Κατηγορία | Microbial electrochemical technologies | en |
| Θεματική Κατηγορία | Sulfate | en |
| Βιβλιογραφική Αναφορά | E. Palma, A. Espinoza Tofalos, M. Daghio, A. Franzetti, P. Tsiota, C. Cruz Viggi, M.P. Papini and F. Aulenta, "Bioelectrochemical treatment of groundwater containing BTEX in a continuous-flow system: substrate interactions, microbial community analysis, and impact of sulfate as a co-contaminant," New Biotechnol., vol. 53, pp. 41-48, Nov. 2019. doi: 10.1016/j.nbt.2019.06.004 | en |
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