Uranium adsorption characteristic and thermodynamic behavior of clinoptilolite zeolite

Kilincarslan, A; Akyil, Sema

doi:10.1007/s10967-005-0750-5

Uranium adsorption characteristic and thermodynamic behavior of clinoptilolite zeolite

Atıf İçin Kopyala

Kilincarslan A., Akyil S.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, cilt.264, sa.3, ss.541-548, 2005 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 264 Sayı: 3
Basım Tarihi: 2005
Doi Numarası: 10.1007/s10967-005-0750-5
Dergi Adı: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.541-548
İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Natural zeolite, clinoptilolite was tested for its ability to remove uranium from aqueous solutions. Influence parameters to the sorption process, such as initial uranium concentration, pH, contact time and temperature were investigated. Distribution coefficients of uranium on clinoptilolite were measured by batch technique. Experimental isotherms evaluated from the distribution coefficients were fit to Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models. Values of Delta H and Delta S were found as 0.93 and 56.09 J/mole, respectively. It was observed that the adsorption process is endothermic. Kinetics of uranium sorption was investigated at different time intervals at 30 degrees C. The reaction rate and diffusion constant were calculated.