• Zоrаn Pеtrоvić Faculty of Technology, University of East Sarajevo, Karakaj bb, Zvornik, Republic of Srpska
  • Pеrо Dugić Oil Refinery, Modrica, Vojvode Stepe Stepanovića 49, Republic of Srpska
  • Vојislаv Аlеksić Faculty of Technology, University of East Sarajevo, Karakaj bb, Zvornik, Republic of Srpska
  • Sаbinа Bеgić Faculty of Technology, University of Tuzla, Univеrzitetska 8, B&H
  • Јаsminkа Sаdаdinоvić Faculty of Technology, University of Tuzla, Univеrzitetska 8, B&H
  • Vlаdаn Мićić Faculty of Technology, University of East Sarajevo, Karakaj bb, Zvornik, Republic of Srpska
  • Nevena Kljajić Faculty of Technology, University of East Sarajevo, Karakaj bb, Zvornik, Republic of Srpska



Bentonites are aluminosilicate minerals which, due to their porosity, layered structure and composition have a wide application. Structural and textural characteristics of bentonite may be improved by different modification procedures. The aim of this study was to investigate compositional, structural and textural characteristics of domestic bentonite in place Gerzovo, before and after the activation with sulfuric acid. These characteristics were investigated by analytical methods, X-ray diffraction (XRD) and the method of low-temperature nitrogen adsorption (BET). Characteristics of acid-activated bentonite were compared with the characteristics of commercial active clay. The obtained results showed that the activation of bentonite with sulfuric acid leads to a significant improvement in structural and textural characteristics. Using these results it can be assumed that this bentonite will have good adsorption characteristics and can serve as an alternative in comparison with imported commercial aluminosilicate-based adsorbents


[1] N. Čеgаr, B. Škundrić, Ј. Pеnаvin Škundrić, R.Pеtrоvić, Adsorption and cathalytic properties of mordenite, Conference proceedings „Contemporary materials”, Bаnjа Lukа 2008, 235−244.

[2] Z. Pеtrоvić, P. Dugić, V. Аlеksić, М. Pеrušić, Influence of acid activated bauxite on structural composition of solvent neutral base oils, Technologica Acta, Vol. 2−1 (2009) 27−37.

[3] R. T. Yang, Adsorbents Fundamentals and Aplications, Yohn Wiley&Sons, Inc. Publications, New Yersey 2003, 8−79.

[4] Z. Pеtrоvić, Proučavanje structure adsorbovanih jedinjenja iz baznih ulja na kiselinom akti-viranim prirodnim adsorbentima [Studying the structure of chemical compounds adsorbed from base oils on natural adsorbents activated by acid], PhD thesis, Faculty of Engineering, Bаnjа Lukа, 2013.

[5] М. S. Rаnđеlоvić, М. М. Purеnоvić, А. R. Zаrubicа, I. D. Мlаdеnоvić, Ј. М. Purеnоvić, М. Z. Моmčilоvić, Physical and chemical characterization of bentonite and its application in removing Mn2+ from water, Hem. ind., Vol. 65−4 (2011) 381−387.

[6] R. E. Grim, Applied Clay Mineralogy, McGraw-Hill Book Company, New York 1962.

[7] F. R.Valenzuela Dias, P. S. Santos, Studies on the Acid Activation of Brazilian Smectitic Clays, Quim. Nova, Vol. 24 (2001) 345−353.

[8] M. Önall, Y. Sarikaya, T. Alemdarogly, I. Bosdogan, The Effect of Acid Activation on Some Physicochemical Properties of Bentonite, Turk J Chem, Vol. 26 (2002) 409−416.

[9] S. Brezovska, B. Marina, D. Burevski, B. Angusheva, V. Boseska and L. Stojanovska, Adsorption properties and porous structure of sulfuric acid treated bentonites determined by the adsorption isotherm of benzene vapor, J. Serb. Chem Soc., Vol. 70−1 (2005) 33−40.

[10] M. J. Žunić, A. D. Milutinović-Nikolić, N. P. Jović-Jovičić, P. T. Banković, Z. D. Mojović, D. Z. Manojlović, D. M. Jovanović, Modified Bentonite as Adsorbent and Catalyst for Filtering Co-lour-Containing Waste Waters, Hem. Ind., Vol. 645−3 (2012) 193−199.

[11] Z. Petrović, P. Dugić, V. Aleksić, Lj. Vasiljević, T. Botić, Activation of domestic bauxites and their application for refining mineral base oils, Journal of Engineering & Processing management an international journal, Vol. 1−1 (2009) 63−72.

[12] Lj. Rožić, T. Novaković, S. Petrović, Z. Vuković, Ž. Čupić, Fractal Analysis of Physical Adsorption on Surfaces of Acid Activated Bentonites from Serbia, Chemical Industry & Chemical Engineering Quarterly (CI&CEQ), Vol. 4 (2008) 227−229.

[13] S. Kaufhold, R. Dobrmann, M. Klinkerberg, S. Siegesmund and K. Ufer, N2- BET specific surface area of bentonites, J. Colloid Interface Sci., Vol. 349 (2010) 275−282.

[14] N. Yildiz, A. Calimly, Alteration of three Turkish bentonites by treatment with Na2CO3 and H2SO4, Turk J. Chem., Vol. 26 (2002) 393−401.

[15] G. Josefaciuk, G. Bowanko, Effects of acid and alkali treatments on surface areas and adsorption energies of selected minerals, Clays and Clay, Vol. 50−6 (2002) 771−783.

[16] S. Sredić, T. Čajkovski, M. Davidović, V. Likar-Smiljanić, M. Marinović-Cincović, U. B. Mioč, Z. Nedić, R. Biljić, Physicochemical Properties of Al-Pillared Montmorillonite Doped with 12-Tunastophosphoric Acid, Material Science Forum, Vol. 453−454 (2004) 157−162.

[17] D. Mitrović i dr., Mineralne sirovine Republike Srpske [Mineral raw materials of the Republic of Srpska], monografija, Republički zavod za geološka istraživanja Republike Srpske, Zvornik 2011, 104−129 (in serbian).

[18] B. D. Culity, Elements of X-ray diffraction, Addison-Wesley, Massachusetts 1978, 531.

[19] Ž. D. Živković, Thermal Analysis, Technical Faculty in Bor, Bor 1984, 23−54.

[20] K. S. W. Sing, D. H. Everett, R. A. W. Haul, L. Moscou, R. A. Pierotti, J. Rouquerol, T. Siemieniewska, Reporting physisorption data for gas solid systems with special reference to the determination of surface area and porosity, Pure and Applied Chemistry, Vol. 57−4 (1985) 603−919.

[21] F. Rouquerol, J. Rouquerol, K. S. W. Sing, Adsorption by Powders & Porous Solids, Principles, Methodology, and Applications, Academic press, London 1999, 441.

[22] J. Rouquerol, D. Avnir, C. W. Fairbridge, D. H. Everett, J. H. Haynes, N. Pericone, J. D. F.Ramsay, K. S. W. Sing, K. K. Unger, Recommendations for the Characterization on Porous Solids, Pure & Appl. Chem., Vol. 66−8 (1994) 1739−1758.