期刊
BIORESOURCE TECHNOLOGY
卷 195, 期 -, 页码 78-82出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.06.027
关键词
Bioelectrochemical dechlorination; 1,2-Dichloroethane; Reductive dechlorination; Microbial biocathode
资金
- CNR
- Regione Lombardia
- FCT (Portuguese Foundation for Science and Technology) [SFRH/BD/87312/2012]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/87312/2012] Funding Source: FCT
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.
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