M Irannajad - Department of Mining and Metallurgy, Amirkabir University of Technology, Tehran, Iran
H Kamran Haghighi - Department of Mining and Metallurgy, Amirkabir University of Technology, Tehran, Iran
Eshagh Safarzadeh - Department of Mining and Metallurgy, Amirkabir University of Technology, Tehran, Iran

The capability of zeolite to remove cadmium from aqueous solution was investigated. The results showedthat the Cd2+ sorption behaviour was highly dependent on the pH. Sorption data were interpreted in terms of Langmuirand Freundlich equations. As a result, sorption isotherms of Cd2+ ions could be best modelled by the Langmuirequation. Thus, the Langmuir expression was developed for Cd2+, respectively. With respect to the results, zeolite hasa particularly high potential for Cd2+ removal.

wastewaters; sorption; cadmium; zinc; zeolite; zeolite