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Open AccessArticle

A Study of Using Natural Sorbent to Reduce Iron Cations from Aqueous Solutions

Faculty of Manufacturing Technologies, Technical University of Košice, 080 01 Prešov, Slovakia
Faculty of Engineering, Slovak University of Agriculture, 949 76 Nitra, Slovakia
Faculty of Technology, College of Technology and Business in České Budějovice, 370 01 České Budějovice, Czech Republic
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(10), 3686;
Received: 13 April 2020 / Revised: 15 May 2020 / Accepted: 20 May 2020 / Published: 23 May 2020
Iron is an essential trace element, but at high doses, this element may pose a health risk. Wastewater from iron ore mining, steel production, and metal processing, among other heavy metals, also contains high concentrations of iron (Fe3+). The use of sorption on natural materials is a potential alternative to conventional methods for removing iron ions, also because of low cost. The methods presented in this article are based on the study of kinetic properties and the acquisition of adsorption isotherms, which are one of the most important characteristics of adsorption mechanisms. The course of sorption is analyzed according to the Freundlich sorption isotherm model. Isotherm parameters are evaluated using experimental results of ferric cation sorption. The results presented relate to the investigation of natural zeolite-clinoptilolite as a ferric cation sorbent, providing a measurement of the sorption kinetics as well as the observed sorption parameters of iron cations from aqueous media. The optimal time for equilibrium in the adsorption system is determined from the kinetic dependencies. The dependence of the achieved equilibrium concentration on the initial concentration of the solution was also expressed, both graphically and analytically. The new prediction model was compared with the traditional Freundlich model. Finally, adsorption isotherms tested under laboratory conditions for a practical application can be recommended for the preliminary examination of the possible technological use of natural zeolite in the wastewater treatment process.
Keywords: zeolite clinoptilolite; ferric cations; wastewater; sorption; adsorption isotherm zeolite clinoptilolite; ferric cations; wastewater; sorption; adsorption isotherm
MDPI and ACS Style

Pandová, I.; Rimár, M.; Panda, A.; Valíček, J.; Kušnerová, M.; Harničárová, M. A Study of Using Natural Sorbent to Reduce Iron Cations from Aqueous Solutions. Int. J. Environ. Res. Public Health 2020, 17, 3686.

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