Zhou, Xiangtong Qu, Youpeng Kim, Byung Hong Choo, Pamela Yengfung Liu, Jia Du, Yue He, Weihua Chang, In Seop Ren, Nanqi Feng, Yujie 2024-01-20T08:34:25Z 2024-01-20T08:34:25Z 2022-01-25 2014-10 0960-8524 https://pubs.kist.re.kr/handle/201004/126264 The effects of azide on electron transport of exoelectrogens were investigated using air-cathode MFCs. These MFCs enriched with azide at the concentration higher than 0.5 mM generated lower current and coulomb efficiency (CE) than the control reactors, but at the concentration lower than 0.2 mM MFCs generated higher current and CE. Power density curves showed overshoot at higher azide concentrations, with power and current density decreasing simultaneously. Electrochemical impedance spectroscopy (EIS) showed that azide at high concentration increased the charge transfer resistance. These analyses might reflect that a part of electrons were consumed by the anode microbial population rather than transferred to the anode. Bacterial population analyses showed azide-enriched anodes were dominated by Deltaproteobacteria compared with the controls. Based on these results it is hypothesized that azide can eliminate the growth of aerobic respiratory bacteria, and at the same time is used as an electron acceptor/sink. (C) 2014 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD Effects of azide on electron transport of exoelectrogens in air-cathode microbial fuel cells Article 10.1016/j.biortech.2014.07.012 1 BIORESOURCE TECHNOLOGY, v.169, pp.265 - 270 BIORESOURCE TECHNOLOGY 169 265 270 N scie scopus 000340894400036 2-s2.0-84904762042 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article ELECTRICITY-GENERATION NITROGENASE REDUCTION TOXICITY MICROORGANISMS INHIBITION OXIDATION ENERGY SENSOR MODE Azide Coulomb efficiency Azide reduction Power overshoot Electron acceptor