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Marek Lipovský, Maroš Sirotiak and Maroš Soldán

References: 1. RAO, G., LU, C., SU, F. 2007. Sorption of divalent metal ions from aqueous solution by carbon nanotubes: A review. Sep. Purif. Technol. , 58 (1), pp. 224–231. 2. DOULA, M. K.: Synthesis of a clinoptilolite-Fe system with high Cu sorption capacity. Chemosphere , 67 (4), pp. 731–40. 3. SVILOVIĆ, S., RUSIĆ, D., STIPISIĆ, R. 2009. Modeling batch kinetics of copper ions sorption using synthetic zeolite NaX. J. Hazard. Mater , 170 (2–3), pp. 941–7. 4. SCHWERTMANN, U., CORNELL, R. M. 1991. Iron Oxides in the Laboratory

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Maroš Sirotiak, Marek Lipovský and Alica Bartošová

. 2231 – 2246. 7. SMIIKLAS, I., DIMOVI, S. and PLEA, I. 2007. Removal of Cs + , Sr 2+ and Co 2+ from aqueous solutions by adsorption on natural clinoptilolite. Applied Clay Science , 35, 12, pp. 139–144. 8. HUA, Z.L., ZHOU, J. and SHI, J.L. 2011: Recent advances in hierarchically structured zeolites: synthesis and material performances. Chemical Communications , 47, pp. 10536–10547. 9. RYBÁR, P. 1999. Utilization and protection of earth resources . Košice: Elfa, 103 p. ISBN 8088964334 10. BURÇIN, M., et al. 2013. Cadmium Adsorption on

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Tomasz Bajda and Zenon Kłapyta

References APHA, 1992: Standard methods for the examination of water and wastewater. American Public Health Association, 18th ed. BAJDA T., KŁAPYTA Z., 2004: Sorption of chromate by clinoptilolite and montmorillonite modified with alkylammonium surfactants. Acta Mineralogica-Petrographica Abstract Series 4, 11. BOWMAN R.S., 2003: Applications of surfactant-modified zeolites to environmental remediation. Microporous and Mesoporous Materials 61, 43

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Qiu Jue Wu, Qin Yu Wang, Tian Wang and Yan Min Zhou

Radical Bio Med., 33 (suppl 2), p. 331. Ivkovic S., Deutsch U., Silberbach A., Walraph E., Mannel M. (2004). Dietary supplementation with the tribomechanically activated zeolite clinoptilolite in immunodeficiency: effects on the immune system. Adv. Ther., 21: 135-147. Khambualai O., Ruttanavut J., Kitabatake M., Goto H., Erikawa T., Yama -uchi K. (2009). Effects of dietary natural zeolite including plant extract on growth performance and intestinal histology in Aigamo ducks. Brit. Poultry Sci., 50: 123-130. Korver D

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Sahand Jorfi, Mohammad Javad Ahmadi, Sudabeh Pourfadakari, Nematollah Jaafarzadeh, Reza Darvishi Cheshmeh Soltani and Hamideh Akbari

). High catalytic activity of Fe(II)-clinoptilolite nanoparticales for indirect voltammetric determination of dichromate: Experimental design by response surface methodology (RSM). J. Electro. Acta , 223 , 47–62. DOI: 10.1016/j.electacta.2016.12.011. 4. Darvishi Cheshmeh Soltani, R.J., Safari, S. & Rajaei, M.M.S. (2016). Enhanced sonocatalysis of textile wastewater using bentonite-supported ZnO nanoparticles: Response surface methodological approach. J. Environ. Manage 179, 47–57. DOI: 10.1016/j.jenvman.2016.05.001. 5. Ahluwalia, S.S. & Goyal, D. (2007

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Elwira Tomczak and Władysław Kamiński

. Adsorption kinetics of naphthalene onto organo-sepiolite from aqueous solutions. Desalination , 220, 96-107. DOI: 10.1016/j.desal.2007.01.025. Gomonaj V. I., Golub N. P., Szekeresh K. Y. Leboda R. Skubiszewska-Zięba J., 1998. Research on the usefulness transcarpathian clinoptilolite for the sorption of Hg(II), Cr(II) and Ni(II) from aqueous solutions. Ochrona Środowiska , 4, 71, 3-6 (in Polish). Gupta S., Babu B. V., 2009. Modeling, simulation, and experimental validation of continuous Cr(VI) removal from aqueous

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D. Barloková and J. Ilavský

Ministry of the Environment of the Slovak Republic, Slovak Environmental Agency , ISBN 978-80-88833-53-6, p. 308. [3] Doula, Maria, K. : Removal of Mn2+ Ions from Drinking Water by Using Clinoptilolite and Clinoptilolite-Fe Oxide System . Water Research, Vol. 40, No. 17, October 2006, pp. 3167-3176. [4] Knocke, W.R., et al. : Kinetics of Manganese and Iron Oxidation by Potassium Permanganate and Chlorine Dioxide. Jour. AWWA, Vol. 6, 1991, pp. 80-87. [5] Knocke, W.R., Hungate, R., Occiano, S. : Removal of Soluble

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Elwira Tomczak and Wladyslaw Kaminski

. Sorption equilibrium of heavy metal ions on modified chitosan beads. Ecol Chem Eng A. 2008;15(7):694-702. Petrus R, Warchoł J. Heavy metal removal by clinoptilolite. An equilibrium study in multi-component system. Water Res. 2005;39:819-830. DOI: 10.1016/j.watres.2004.12.003. Charlet L, Tournassat Ch. Fe(II)-Na(II)-Ca(II) cations exchange on montmorillonite in chloride medium: evidence for preferential clay adsorption of chloride - metal ion pairs in seawater. Aquat Geochem. 2005;11:115-137. DOI: 10.1016/j

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Jozef Mačala, Iveta Pandová and Anton Panda

References Ackley, M. and Yang, R. 1991. Adsorption characteristics of High- Exchange clinoptilolites. Ind. Eng. Res. 30, pp. 2523-2530. Ackley, et al. 2003. Application of Natural Zeolites in the Purification and Separation of Gases. Microporous and Mesoporous Materials 61(1-3), pp. 25-42. Anunziata, O.A. 2004. Fe-containing ZSM-11 zeolites as active catalyst for SCR of NOx: part I. Synthesis, characterization by XRD, BET and FTIR and catalytic properties. Appl. Catal. A Gen. 264(1), pp. 93

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Jozef Mačala, Iveta Pandová, Taťána Gondová and Katarína Dubayová

Reduction of polycyclic aromatic hydrocarbons and nitrogen monooxide in combustion engine exhaust gases by clinoptilolite

The subject of this work was the investigation of zeolite as a sorbent of toxic gases. In Nizny Hrabovec in the Slovak republic, two layers of zeolite with the active component clinoptilolite can be found. The study presented here investigated the ability of this natural zeolite to reduce polycyclic aromatic hydrocarbons (PAH) and NO emissions from engine exhaust. Exhaust gases from combustion engines include toxic components such as carbon monoxide, nitrogen oxides and hydrocarbons. Polycyclic aromatic hydrocarbons (PAH) are a component of hydrocarbons causing harmful influence on life forms. The experiments focused on the potential reduction of these toxic gases based on the sorption and catalytic properties of natural zeolite. Also observed was the influence of chemical adjustment including incorporation of certain metal elements. Chemical analysis by mutually independent technologies served to observe the sorption of PAH with carcinogenic properties on the natural zeolite tested. The experiments showed that chemical modification improved the sorption and catalytic properties of natural zeolite. The PAH were analysed in an extract of the contaminated, thermally-activated natural zeolite and modified zeolite after washing with ammonium chloride, cobalt chloride and copper sulphate. The study also presents results of NO measurements obtained by testing the filter-sorptive automobile system.