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Electrocatalytic activity of anodic biofilm responses to pH changes in microbial fuel cells.
Bioresour Technol. 2011 Jul; 102(13):6887-91.BT

Abstract

This study investigates the effects of anodic pH on electricity generation in microbial fuel cells (MFCs) and the intrinsic reasons behind them. In a two-chamber MFC, the maximum power density is 1170 ± 58 mW m(-2) at pH 9.0, which is 29% and 89% higher than those working at pH 7.0 and 5.0, respectively. Electrochemical measurements reveal that pH affects the electron transfer kinetics of anodic biofilms. The apparent electron transfer rate constant (k(app)) and exchange current density (i(0)) are greater whereas the charge transfer resistance (R(ct)) is smaller at pH 9.0 than at other conditions. Scanning electron microscopy verifies that alkaline conditions benefit biofilm formation in MFCs. These results demonstrate that electrochemical interactions between bacteria and electrodes in MFCs are greatly enhanced under alkaline conditions, which can be one of the important reasons for the improved MFC output.

Authors+Show Affiliations

Guangdong Institute of Eco-environmental and Soil Sciences, Guangzhou 510650, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21530241

Citation

Yuan, Yong, et al. "Electrocatalytic Activity of Anodic Biofilm Responses to pH Changes in Microbial Fuel Cells." Bioresource Technology, vol. 102, no. 13, 2011, pp. 6887-91.
Yuan Y, Zhao B, Zhou S, et al. Electrocatalytic activity of anodic biofilm responses to pH changes in microbial fuel cells. Bioresour Technol. 2011;102(13):6887-91.
Yuan, Y., Zhao, B., Zhou, S., Zhong, S., & Zhuang, L. (2011). Electrocatalytic activity of anodic biofilm responses to pH changes in microbial fuel cells. Bioresource Technology, 102(13), 6887-91. https://doi.org/10.1016/j.biortech.2011.04.008
Yuan Y, et al. Electrocatalytic Activity of Anodic Biofilm Responses to pH Changes in Microbial Fuel Cells. Bioresour Technol. 2011;102(13):6887-91. PubMed PMID: 21530241.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrocatalytic activity of anodic biofilm responses to pH changes in microbial fuel cells. AU - Yuan,Yong, AU - Zhao,Bo, AU - Zhou,Shungui, AU - Zhong,Shengkui, AU - Zhuang,Li, Y1 - 2011/04/09/ PY - 2011/01/10/received PY - 2011/04/06/revised PY - 2011/04/07/accepted PY - 2011/5/3/entrez PY - 2011/5/3/pubmed PY - 2011/9/29/medline SP - 6887 EP - 91 JF - Bioresource technology JO - Bioresour Technol VL - 102 IS - 13 N2 - This study investigates the effects of anodic pH on electricity generation in microbial fuel cells (MFCs) and the intrinsic reasons behind them. In a two-chamber MFC, the maximum power density is 1170 ± 58 mW m(-2) at pH 9.0, which is 29% and 89% higher than those working at pH 7.0 and 5.0, respectively. Electrochemical measurements reveal that pH affects the electron transfer kinetics of anodic biofilms. The apparent electron transfer rate constant (k(app)) and exchange current density (i(0)) are greater whereas the charge transfer resistance (R(ct)) is smaller at pH 9.0 than at other conditions. Scanning electron microscopy verifies that alkaline conditions benefit biofilm formation in MFCs. These results demonstrate that electrochemical interactions between bacteria and electrodes in MFCs are greatly enhanced under alkaline conditions, which can be one of the important reasons for the improved MFC output. SN - 1873-2976 UR - https://www.unboundmedicine.com/medline/citation/21530241/Electrocatalytic_activity_of_anodic_biofilm_responses_to_pH_changes_in_microbial_fuel_cells_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-8524(11)00478-0 DB - PRIME DP - Unbound Medicine ER -