CHARACTERIZATION OF NATURAL ZEOLITE AND DETERMINATION ITS ADSORPTION PROPERTIES

Pollution of water by toxic substances is one of the major reason concerning human health as well as the environmental quality. In terms of pollution, mining activities represent a serious threat. Countries of the middle Europe, where extraction of mineral resources takes place a long period, have to solve the problems of wastewater containing whole spectra of heavy metals, which are dangerous to the environment. Finding of the new and cheap ways of wastewater contaminated by heavy metals treatment can increase the quality of the environment in the affected localities and thus prevent adverse effects on fauna, flora or human beings. Sorption techniques belong to a cost effective methods that are able to effectively remove heavy metals. For the overall understanding of the sorption process, it is necessary to characterize and determine the properties of the used adsorbents. The paper deals with characterization of natural zeolite before and after sorption process under acidic conditions. The zeolite was characterized using Fourier transform infrared spectroscopy, X – ray diffraction, scanning electron microscopy and N₂ adsorption/desorption isotherms.

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[1] Foldesová M., Hudec P. Štúdium povrchových vlastností slovenského prírodného zeolitu – klinoptilolitu fyzikálnou adsorpciou dusíka. Petroleum & Coal , vol. 49, no 1, pp. 34-40, 2007.

[2] El-Kamash A.M. Evaluation of zeolite A for the sorptive removal of Cs+ and Sr2+ ions from aqueous solutions using batch and fixed bed column operations. Journal of. Hazardous Materials, vol. 151, issues 2 – 3, pp. 432–445, 2008.

[3] Baker H.M., Massadeh A.M., Younes H.A. Natural Jordanian zeolite: removal of heavy metal ions from water samples using column and batch method. Environmental Monitoring and Assessment. vol. 157, issues 1 – 4, pp. 319–330, 2009.

[4] Hamidpour M., Kalbasi M., Afyuni M., Shariatmadari H., Holm P.E., Hansen H.C.B. Sorption hysteresis of Cd(II) and Pb(II) on natural zeolite and bentonite. Journal of Hazardous Materials, vol. 181, issues 1 – 3, pp. 686–691, 2010.

[5] Wang S., Peng Y. Natural zeolites as effective adsorbents in water and wastewater treatment. Chemical Engineering Journal, vol. 156, issue 1, pp. 11–24, 2010.

[6] Zhao D., Zhou J., Liu N. Preparation and characterization of Mingguang palygorskite supported with silver and copper for antibacterial behavior. Applied Clay Science, vol. 33, pp. 161 – 170, 2006.

[7] Van der Marel H.W., Beutelspacher H. Atlas of Infrared Spectroscopy of Clay Minerals and their admixtures. Elsevier, USA, 1976.

[8] Burn P. Design and testing of natural/blended zeolite ion exchange columns at West Valley. AlChE Symp. Ser., vol. 83, pp. 66 – 72, 1987.

[9] Helfferich F. Ion Exchange. Dover Publications Inc., New York, 1995.