KINETIC STUDY OF BLUE M–EB DYE SORPTION ON ION EXCHANGE RESINS

Abstract

A kinetic study concerning the Blue M-EB reactive dye sorption from aqueous solutions on Purolite ion exchange resins of macroporous (A–500) and gel (A–400) type has been made. To establish the rate – controlling step, the time required for 50% sorption equilibrium (t1/2), rate constant of the process (K), diffusion coefficient and activation energy (Ea) for both resins have been calculated. On the basis of the calculated values it is obvious that sorption process is in the diffusion domain, rate-controlling step is the particle diffusion. This result is confirmed by the fact that reactive dye Blue M-EB sorption is in good agreement with shell-progressive model.