Algae cathode microbial fuel cells for cadmium removal with simultaneous electricity production using nickel foam/graphene electrode

作者：Zhang, Yu; He, Qiaoning; Xia, Ling^*; Li, Yinta; Song, Shaoxian

来源：Biochemical Engineering Journal, 2018, 138: 179-187.

DOI：10.1016/j.bej.2018.07.021

• Chlorella
• Microbial fuel cells
• Graphene
• Cd(II) removal

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.

• 出版日期2018-10-15
• 单位武汉理工大学; 湖北大学