Effect of Low Cadmium Concentration on the Removal Efficiency and Mechanisms in Microbial Electrolysis Cells

Abstract Microbial electrolysis cells (MECs) can be used to remove cadmium (Cd 2+ ) via three removal mechanisms: electrodeposition; chemical precipitation; and biosorption. Here, we investigated how cadmium concentration affects its removal mechanisms and efficiency in lab‐scale MECs. For 10, 50, and 100 μg‐Cd/L, cadmium was removed by electrodeposition and biosorption without chemical precipitation. The total amount of cadmium removed by …