Utilization of chitosan-clinoptilolite composite for the removal of radiocobalt from aqueous solution: kinetics and thermodynamics

Zhao, Yaolin; Zhao, Xianghai; Deng, Jia; He, Chaohui
May 2016
Journal of Radioanalytical & Nuclear Chemistry;May2016, Vol. 308 Issue 2, p701
Academic Journal
Chitosan-clinoptilolite composite was prepared and tested for removing radiocobalt from aqueous solution. The composite was characterized with Fourier transform infrared spectroscopy, X-ray diffraction analysis and scanning electron microscopy coupled with energy dispersive X-ray analysis. The sorption of Co(II) on chitosan-clinoptilolite composite was pH-dependent and ionic strength-independent. The kinetic sorption was fitted well by a pseudo-second-order rate equation. The thermodynamic parameters (Δ H, Δ S, Δ G) revealed that the sorption of Co(II) on chitosan-clinoptilolite composite was spontaneous and endothermic. The study showed that chitosan-clinoptilolite composite had excellent potential for the treatment of wastewater containing radiocobalt.


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