A Kinetic Study on the Adsorption of Cd(II) and Zn(II) Ions from Aqueous Solutions on Zeolite NaA

Authors: Dimitar Georgiev, Bogdan Bogdanov, Irena Markovska, Yancho Hristov, Dencho Stanev

Abstract:

The present paper reports the removal of Cd(II) and Zn(II) ions using synthetic Zeolit NaA. The adsorption capacity of the sorbent (Zeolite NaA) strongly depends on simultaneous or not simultaneous (concurrent) presence of Cd(II) and Zn(II) in the sorbate. When Cd(II) and Zn(II) are present simultaneously (concurrently) in the sorbate, Zn(II) ions were sorbed at higher rate. Equilibrium data fitted Langmuir, Freundlich and Tempkin isotherms well. The applicability of the isotherm equation to describe the adsorption process was judged by the correlation coefficients R2. The Langmuir model yielded the best fit with R2 values equal to or higher than 0.970, as compared to the Freundlich and Tempkin models. The fact that 1/n values range from 0.322 to 0.755 indicates that the adsorption of Cd(II) and Zn(II) ions from aqueous solutions also favored by the Freundlich model.

Keywords: Adsorption, adsorption capacity, kinetic sorption, Zeolite NaA

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331373

References:

[1] M. J. Yabe, E. Oliveira "Heavy metals removal in industrial effluents by sequential adsorbent treatment", Adv. Env. Res, 7, 2003, pp. 263-272.
[2] K. K. Panday, G. Prasad, V. N. Singh "Copper (II) removal from aqueous solutions by fly ash", Wat. Res. Vol.19, 1985, pp.869.
[3] G. Blanchard, M. Maunaye, G. Martin "Removal of heavy metals from waters by means of natural zeolites", Water Res. 18,1984, pp.1501- 1507.
[4] Y.S.Ho "Second-order kinetic model for the sorption of cadmium onto tree fern: A comparison of linear and non-linear methods", Water Res. 40(1), 2006, pp. 119-125.
[5] H.J.M. Bowen, The Environmental Chemistry of the Elements, Academic Press, London, 1979, pp 109-111.
[6] Curkovic S.; Metal ion exchange by natural and modified zeolites; Wat. Res., vol.31, 1997, pp.1379-1382.
[7] D. Georgiev, B. Bogdanov, Y. Hristov, I. Markovska and I. Petrov ÔÇ×Synthesis of NaA zeolite from natural kaolinite", 8 th International conference on the occurrence, properties and utilization of natural zeolites, 10-18 July 2010, Sofia, pp. 95-96.
[8] D. Georgiev, B. Bogdanov, Y. Hristov, I. Markovska, Iv.Petrov "NaA zeolite synthesized in fluidized bed reactor", 15th International Metallurgy & Materials Congress (IMMC 2010), Istambul, November 11th- 13th,2010, p.210-216.
[9] F. Scholz, Electroanalytical Methods, Guise to Experiments and Applications, Springer, Moskow, 2006.
[10] B. Biskup, B. Suboti "Kinetic analysis of the exchange processes between sodium ions from zeolite A and cadmium, copper and nickel ions from solutions", Separation and Purification Technology, vol. 37, 2004, pp. 17-31.
[11] S. Singh et. al., "Adsorption Behaviour of Ni (II) from Water onto Zeolite X: Kinetics and Equilibrium Studies", Proceedings of the World Congress on Engineering and Computer Science 2008 WCECS 2008, October 22 - 24, 2008, San Francisco, USA, ISBN: 978-988-98671-0-2, pp.199-206.
[12] H. Dyer et-al, "The plotting and interpretation of ion exchange isotherms in charcoal systems", Sep. Sci. Technol., voL16, 1981, pp. l73-183.
[13] S.R. Shukla, Roshan S.Pai, "Adsorption of Cu(II), Ni (II) and Zn(II) on dye loaded groundnut shells and sawdust", Separation and purification Technology, Vol. 43, 2005, pp. 1-8.
[14] J. Febrianto, A.N. Kosasiha, J. Sunarsob, Y, N. Jua, "Equilibrium and kinetic studies in adsorption of heavy metals using biosorbent: A summary of recent studies",J Hazard Mater, 162, 2009, pp. 616-645.