Electrodeionization 1: Migration of nickel ions absorbed in a rigid, macroporous cation-exchange resin

The removal of nickel ions from a packed bed of ion-exchange material under an applied potential is studied. This process involves the use of an elect rodialysis type cell in which the centre compartment is filled with a packe d bed of ion-exchange particles. The bed width, concentration of nickel in the resin and electrolyte concentration were varied. Emphasis was placed on the rate of nickel migration, current efficiency and the effective mobilit y of nickel in the system. The purpose of the study is to aid in the develo pment of a system for the continuous removal of heavy metal ions from dilut e solutions.