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Equilibrium Studies on Adsorption of Cu(II) from Aqueous Solution onto Cellulose

✍ Scribed by Bilal Acemioglu; Mehmet Hakki Alma

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
51 KB
Volume
243
Category
Article
ISSN
0021-9797

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✦ Synopsis

Cellulose, a natural polymer, was used as an adsorbent for the adsorption of Cu(II) ions from the aqueous solutions of copper sulfate pentahydrate (CuSO 4 β€’ 5H 2 O) at different temperatures and a fixed pH. The amount adsorbed increased with increasing concentration of Cu(II) ions; however, it did not differ significantly with temperature. The equilibrium times of adsorptions of Cu(II) ions at various temperatures were the same. Kinetics studies showed that the adsorption process obeyed the first-order reversible kinetic model. It was also determined that adsorption isotherms followed both Freundlich and Langmuir models. Furthermore, the thermodynamic parameters, i.e., standard free energy ( G β€’ ), standard enthalpy ( H β€’ ), and standard entropy ( S β€’ ), of the adsorption process were calculated. The results obtained are discussed in detail.

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