Electrolytic removal of Ag(I) in the liquid wastes generated from the mediated electrochemical oxidation process

The electrolytic removal of Ag(I) on a platinum rotating cylindrical electr ode (RCE) in the liquid wastes generated from the mediated electrochemical oxidation (MEO) process was studied under a constant current. The effects o f various parameters such as applied current density, concentration of HNO3 , temperature and hydrodynamics on the removal efficiency and the morpholog y of the electrodeposits were investigated. The removal efficiency higher t han 98% could be obtained in the concentrations of HNO3 less than 3 M (=mol /dm(3)) with the current efficiency more than about 95%. At lower concentra tions of HNO3, higher rotational rates, and lower temperatures, larger remo val efficiency could be obtained.