期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 138, 期 -, 页码 179-187出版社
ELSEVIER
DOI: 10.1016/j.bej.2018.07.021
关键词
Chlorella; Microbial fuel cells; Graphene; Cd(II) removal
资金
- National Natural Science Foundation of China [51604207]
- Key Laboratory of Biohydrometallurgy Ministry of Education of Central South University in China [MOEKLB1701]
Microalgae (Chlorella sp. QB-102) was introduced into microbial fuel cell (MFC) as the cathode for Cd(II) removal using nickel foam/graphene (NF/rGO) as electrodes. It was found that graphene enhanced the power generation and decreased the internal resistance in the algal-cathode MFC. The start-up time was shortened and the maximum power density obtained by using NF/rGO (36.4 mW m(-2)) was eight times higher against bare NF. Graphene further improve the maximum tolerable concentrations of Cd(II) in the algal-cathode, which estimated to be 50 ppm. Using NF/rGO electrode, the algal-cathode MFC achieved a high Cd(II) removal efficiency of almost 95% and a maximum adsorption amount of 115 g m(-2). It was found that hydroxide precipitation and biosorption are the major mechanisms for the Cd removal in the biocathode self-sustained MFC. The results suggested that photoautographic MFC is feasible and effective for heavy metal removal in the algal-cathode and graphene modification in the electrodes is recommended. (C) 2018 Elsevier B.V. All rights reserved.
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