Hamidreza Mahmoudian - Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
Taher Yousefi - NFCRS, Nuclear Science and Technology Research Institute, P.O. Box ۱۱۳۶۵/۸۴۸۶,Tehran, Iran
Mohammad Ali oosavian - Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
Meisam Torab-Mostaedi - NFCRS, Nuclear Science and Technology Research Institute, P.O. Box ۱۱۳۶۵/۸۴۸۶,Tehran, Iran

In the present study, the ability of modified natural zeolite clinoptilolite to remove Pb(II) from aqueous solutions has been investigated in batch method. The modified zeolite was characterized using SEM and FT-IR. The SEM image confirms the present of particles on nanoscale with average size of 60 nm. Adsorption tests of Pb(II) were carried out using a solution concentration between 10 ppm to 100 ppm at pH = 5.7. Modification studies have been performed to improve the sorption efficiency. As a result the Pb(II) removal efficiency was 96.31% using raw clinoptilolite while it was 99.95% using modified clinoptilolite.

Adsorption; Nanoparticle; Natural zeolite; Hexacyanoferrate; Modification