Hybrid Capacitive Deionization with Ag-coated Activated Carbon Electrodes for Nickel Treatment

Nickel (Ni) is an essential resource in many industries. However, as the industrial use of Ni increases, its impact environmental pollutant has also increased. Accordingly, effective treatment processes are required. In this study, hybrid capacitive deionization (HCDI) with Ag-coated activated carbon (AC) electrode was proposed a treatment. The capacity HCDI system Ag coating 66% higher than that membrane system. addition, applied potential increased from 0.5 V to 1.1 V, 10 mg/g 18 mg/g, although charge efficiency decreased 84.6% 77.2%. when 0.9 or more, pH effluent exceeded drinking water range, which appeared be caused by electron transfer reaction ions under high (0.9 more). terms energy consumption, electrodes achieved 0.24 Wh/g-NiCl2 minimum value. results study demonstrate (CDI) for