The embedding microbial fuel cell (MFC) into constructed wetlands (CW) to form CW-MFC bears the potential to obtain bioelectricity and a clean environment. In this study, a bibliometric analysis using VOSviewer based on Web of Science data was conducted to provide an overview by tracing the development footprint of this technology. The countries, institutions, authors, key terms, and keywords were tracked and corresponding mapping was generated. From 2012 to September 2020, 442 authors from 129 organizations in 26 countries published 135 publications in 42 journals with total citation of 3139 times were found. The key terms analysis showed four clusters: bioelectricity generation performance, mechanism study, refractory pollutants removal, and enhanced conventional contaminants removal. Further research themes include exploring the biochemical properties of electrochemically active bacteria, emerging contaminants removal, effective bioelectricity harvest and the use, and biosensor development as well as scaling-up for real field application. The bibliometric results provide valuable references and information on potential research directions for future studies.

Department of Municipal and Environmental Engineering Faculty of Water Resources and Hydroelectric Engineering Xi'an University of Technology Xi'an 710048 PR China; State Key Laboratory of Eco Hydraulics in Northwest Arid Region Xi'an University of Technology Xi'an 710048 PR China

Faculty of Environmental Sciences Czech University of Life Sciences Prague Czech Republic

Institute of Ecology and Earth Sciences University of Tartu Vanemuise 46 51014 Tartu Estonia

School of Water and Environmental Engineering Chang'an University Xi'an 710054 PR China

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