The kinetics and thermodynamics of metal ions (Sr2+, Sm3+, Gd3+, Th4+ and UO22+ adsorption from aqueous solutions on activated charcoal have been investigated. The adsorption process of metal ions proceeds via two stages, the first stage is rather fast followed by a much slower om Bangham equation was applied to study the kinetics of metal ions adsorption. It is observed that the diffusion of metal ions into the micropores of the activated charcoal controls the kinetics of the adsorption process. various thermodynamic quantities, Delta H, Delta S, Delta G, were computed from equilibrium constant, k(c) values. The results show that the adsorption of the metal ions on activated charcoal is an endothermic process.
M SALEEM ,JAVED HANIF ,RIAZ QADEER ,M AFZAL ,
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