Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB

Torres-Rojas, Felipe; Munoz, Diana; Tapia, Natalia; Canales, Camila; Vargas, Ignacio T

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 k Omega. 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 (epsilon degrees = 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.

Más información

Título según WOS: Bioelectrochemical chlorate reduction by Dechloromonas agitata CKB
Título de la Revista: BIORESOURCE TECHNOLOGY
Volumen: 315
Editorial: ELSEVIER SCI LTD
Fecha de publicación: 2020
DOI:

10.1016/j.biortech.2020.123818

Notas: ISI