Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB

Felipe Torres-Rojas; Diana Muñoz; Natalia Tapia; Camila Canales; Ignacio T. Vargas

doi:10.1016/j.biortech.2020.123818

Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB

Felipe Torres-Rojas
, Diana Muñoz
, Natalia Tapia
, Camila Canales
, Ignacio T. Vargas

Science Institute

University of Iceland

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	123818
Journal	Bioresource Technology
Volume	315
DOIs	https://doi.org/10.1016/j.biortech.2020.123818
Publication status	Published - Nov 2020

Bibliographical note

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

Other keywords

Biocathode
Bioelectrochemical reactor
Chlorate
Dechloromonas agitata
Microbial Electrochemical Technology

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10.1016/j.biortech.2020.123818

Cite this

@article{d05615ab69af4fde8edc3bcfb629dc2b,

title = "Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB",

abstract = "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.",

keywords = "Biocathode, Bioelectrochemical reactor, Chlorate, Dechloromonas agitata, Microbial Electrochemical Technology",

author = "Felipe Torres-Rojas and Diana Mu{\~n}oz and Natalia Tapia and Camila Canales and Vargas, \{Ignacio T.\}",

note = "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{\'i}a de Investigaci{\'o}n (VRI) of the Pontificia Cat{\'o}lica de Chile and Agencia Nacional de Investigaci{\'o}n 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: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = nov,

doi = "10.1016/j.biortech.2020.123818",

language = "English",

volume = "315",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

}

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 -

Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB

Abstract

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