TY - JOUR
T1 - Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB
AU - Torres-Rojas, Felipe
AU - Muñoz, Diana
AU - Tapia, Natalia
AU - Canales, Camila
AU - Vargas, Ignacio T.
N1 - Funding Information: This work was supported by FONDECYT projects 1160917 and 1201134 under the Centro de Desarrollo Urbano Sustentable (CEDEUS) CONICYT/FONDAP/15110020. Thanks to the Vicerrectoría de Investigación (VRI) of the Pontificia Católica de Chile and Agencia Nacional de Investigación y Desarrollo grant Nº 21190934 for funding for the development of this work. Funding Information: This work was supported by FONDECYT projects 1160917 and 1201134 under the Centro de Desarrollo Urbano Sustentable (CEDEUS) CONICYT/FONDAP/15110020. Thanks to the Vicerrector?a de Investigaci?n (VRI) of the Pontificia Cat?lica de Chile and Agencia Nacional de Investigaci?n y Desarrollo grant N? 21190934 for funding for the development of this work. Publisher Copyright: © 2020 Elsevier Ltd
PY - 2020/11
Y1 - 2020/11
N2 - Chlorate has been described as an emerging pollutant that compromises water sources. In this study, bioelectrochemical reactors (BERs) using Dechloromonas agitata CKB, were evaluated as a sustainable alternative for chlorate removal. BERs were operated under flow-recirculation and batch modes with an applied cell-voltage of 0.44 V over a resistance of 1 kΩ. Results show chlorate removal up to 607.288 mg/L. After 115 days, scanning electron microscopy showed biofilm development over the electrodes, and electrochemical impedance spectroscopy confirmed the biocatalytic effect of CKB. The theoretical chlorate bioreduction potential (ε° = 0.792 V) was proven, and a kinetic study indicated that 6 electrons were involved in the reduction mechanism. Finally, a hypothetical bioelectrochemical mechanism for chlorate reduction in a BER was proposed. This research expands upon current knowledge of novel electrochemically active microorganisms and widens the scope of BER applications for chlorate removal.
AB - Chlorate has been described as an emerging pollutant that compromises water sources. In this study, bioelectrochemical reactors (BERs) using Dechloromonas agitata CKB, were evaluated as a sustainable alternative for chlorate removal. BERs were operated under flow-recirculation and batch modes with an applied cell-voltage of 0.44 V over a resistance of 1 kΩ. Results show chlorate removal up to 607.288 mg/L. After 115 days, scanning electron microscopy showed biofilm development over the electrodes, and electrochemical impedance spectroscopy confirmed the biocatalytic effect of CKB. The theoretical chlorate bioreduction potential (ε° = 0.792 V) was proven, and a kinetic study indicated that 6 electrons were involved in the reduction mechanism. Finally, a hypothetical bioelectrochemical mechanism for chlorate reduction in a BER was proposed. This research expands upon current knowledge of novel electrochemically active microorganisms and widens the scope of BER applications for chlorate removal.
KW - Biocathode
KW - Bioelectrochemical reactor
KW - Chlorate
KW - Dechloromonas agitata
KW - Microbial Electrochemical Technology
UR - https://www.scopus.com/pages/publications/85088014322
U2 - 10.1016/j.biortech.2020.123818
DO - 10.1016/j.biortech.2020.123818
M3 - Article
C2 - 32688253
SN - 0960-8524
VL - 315
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123818
ER -