Taher Yousefi - Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Hamid Raza Moazami - Physics and Accelerators Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Hamid Reza Mahmudian - Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
Meisam Torab-Mostaedi - Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

In the current research work the Iranian natural zeolite (clinoptililite) was modified with Cobalt Hexacyanoferrate nanopatricles. The natural and Cobalt Hexacyanoferrat modifed zeolites were characterized by FTIR and SEM techniques and were empolyed as an adsorbent for removal Cd(II) ions from aqueous sloution. The adsorption expriments were performed in bach mode. The Cd(II) sorption capacity of Cobalt Hexacyanoferrat modified zeolite was 51 mg g-1. The effect of influceing factors such as time, temperature and initial concentration were investigated. A fast sorption was observed in the initial contact time and equilibrium was achieved in less than 100 min. The equilibrium adsorption data for Cd (II) were better fitted to the Longmuir adsorption isotherm model. The increase in temperature has a slight positive effect on the uptake of Cd(II) ions. The results indicated that the Cobalt Hexacyanoferrate nanopatricles modified natural zeolite has effective potential for the adsorption of Cd(II) from the wastewater.

Adsorptiom; Clinoptilolite; Cobal Hexacyanoferrate; Nanoparticle; Zeolite