title: Efficacy of single-chamber microbial fuel cells for removal of cadmium and zinc with simultaneous electricity production.
abstract: Simultaneous high power generation (3.6 W/m(2)) and high Cd (90%) and Zn (97%) removal efficiencies were demonstrated in a single chamber air-cathode microbial fuel cell (MFC). The maximum tolerable concentrations (MTCs) were estimated as 200 μM for Cd and 400 μM for Zn. Increasing the concentrations of Cd to 300 μM and Zn to 500 μM resulted in voltage drops by 71 and 74%, respectively. Feeding the MFCs with incrementally increased Cd and Zn concentrations resulted in much slower reduction in voltage output. Biosorption and sulfides precipitation are the major mechanisms for the heavy metal removal in the MFCs.
authors.affiliation: Department of Biological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, OR 97331, USA.
authors.forename: Carole
authors.initials: C
authors.lastname: Abourached
authors.affiliation: Department of Biological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, OR 97331, USA.
authors.forename: Tunc
authors.initials: T
authors.lastname: Catal
authors.affiliation: Department of Biological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, OR 97331, USA. Electronic address: liuh@engr.orst.edu.
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D001674:Bioelectric Energy Sources; D002104:Cadmium / Q000302:isolation & purification*; D013058:Mass Spectrometry; D013440:Sulfides / Q000737:chemistry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D015032:Zinc / Q000302:isolation & purification*
chemical_list: D013440:Sulfides; D014874:Water Pollutants, Chemical; D002104:Cadmium; D015032:Zinc
keywords: Cadmium; Electricity; Heavy metal removal; Microbial fuel cell; Zinc