Langmuir and Freundlich Isotherm Studies of Copper (II) Removal using Var?ous Adsorbents for Purifying Water

Distinctive adsorption equilibria studies are of extensive use in explaining the biosorption of heavy metals, denoting the need to highlight and summarize their essential issues, which is the main purpose of this paper. As a general trend, up until now, most studies on the biosorption of Cu (II) by miscellaneous biosorbent types have been directed toward the uptake of single metal in preference to multicomponent systems. In particular, Langmuir and Freundlich models are the most common isotherms for correlating biosorption experimental data though other isotherms, whichwere initially established for gas phase applications, can also be extended onto biosorption system.