Ag(I) ion imprinted polymers were s

Ag(I) ion imprinted polymers were successfully prepared and
tested for the extraction of Ag(I) in aqueous media. The study reveals
that the adsorption process depended on the contact time,
the initial metal ion concentration, the quantity of polymer and
the pH of the solution. For the two polymers high adsorption rates
were observed at the beginning of the adsorption process and saturation
values were reached within 30 min. The data also indicate
that the pseudo second- order model provides better correlation of
the adsorption data than the pseudo-first-order model; thus suggesting
that the rate-limiting step might be chemical sorption.
The regression results of the intra-particle diffusion model suggested
that intra-particle diffusion was not the only rate-controlling
step. The adsorption isotherms could be well fitted by the
Langmuir isotherm equation. The sorbents were efficient for silver
extraction in aqueous media containing other closely related ions,such as Cd(II), Pb(II), and Cu(II). Therefore, there might be good
prospects for the silver-imprinted polymer in practical applications
for the specific recovery of Ag(I) ions from aqueous solutions