Figure 8

Effect of Current density on (a) Cu²⁺ and (b) Ni²⁺ removal of the synthesized wastewater during the ADS and ADS/EC coupling processes (Activated green tea waste dose = 1 g L⁻¹, pH = 6, Current density = 1.19 mA cm⁻², Initial conc. = 20 mg L⁻¹ and contact time = 120 min).