International Journal of Chemistry and Technology, cilt.2, sa.1, ss.20-33, 2018 (Hakemli Dergi)
For removal of Cu(II) ions from aqueous solutions, a novel
composite was prepared from 1-vinyl imidazole and sepiolite
by the technique of in-situ polymerization. Adsorption of Cu(II)
ions onto Sepiolite-Poly(vinylimidazole) composite prepared
has been studied at 277338 K and the experimental data were
analyzed using various isotherm models. The Langmuir and the
Toth models procured the best fit to the experimental data of
the adsorption among the two-parameter and three-parameter
models, respectively. The adsorption equilibrium was reached
in 3 h and the optimum pH for the adsorption was found to be
5. Adsorption isotherm modeling showed that the interaction
between adsorbate and adsorbent is localized to monolayer
adsorption. Maximum adsorption capacity (qm) calculated from
Langmuir isotherm was found to be 261.91 mg g−1 at 250C. The
calculated thermodynamic parameters indicated an endothermic
adsorption process. The composite is thought to be a promising
adsorbent for the removal of Cu(II) ions.