A Kinetic Study of Copper(II) Extraction using LIX84-I Impregnated Polymeric Particles with Different Structures

摘要

Polymeric particles impregnated with LIX84-I having different structures, such as large interconnected -spherical pores (PDVB), small pores (XAD-4) and multi cores (PVA/NaAlg-GA crosslinked gel), were used for copper(II) extraction from an aqueous phase. The extraction kinetics of copper(II) from the aqueous solution into three different types of polymeric particles was influenced by the amount of LIX84-I impregnated in the polymeric particles and also their structures. The amount of copper(II) adsorbed into all types of the polymeric particles increased with time and reached a plateau after a longer contact time. The extraction mechanism of copper(II) into all types of polymeric particles impregnated with LIX84-I was found to obey Pseudo-second order kinetics. It is suggested that complex-formation and mass-transfer diffusion is the predominant rate-determining step in the copper(II) extraction process from aqueous solution into the polymeric particles.