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Minerals 2018, 8(1), 11; https://doi.org/10.3390/min8010011

Natural and Modified Zeolite—Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions

1
Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d’Eperea 86, 11000 Belgrade, Serbia
2
Vinča Institute for Nuclear Science, University of Belgrade, Mike Petrovića Alasa 12-14, 11351 Vinča, Serbia
3
Faculty of Technical Science, University of Priština, Kneza Miloša 7, 38220 Kosovska Mitrovica, Serbia
*
Author to whom correspondence should be addressed.
Received: 28 November 2017 / Revised: 25 December 2017 / Accepted: 5 January 2018 / Published: 6 January 2018
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Abstract

In present paper, the influence of the initial pH and concentration of Pb2+ on its adsorption by the natural (NZA) and Fe(III)-modified zeolite-alginate beads (FeA) was studied. Results showed that modification of the starting materials have a positive effect on their adsorption capacities (102 and 136 mg/g for the NZA and FeA, respectively). After encapsulation, the mechanism of lead adsorption by both adsorbents was changed and ion exchange dominates. The best adsorption was achieved for initial pH > 3.8. Cation exchange capacity, structural properties, and hydrophobicity of samples were also determined, and the presence of the alginate has no significant influence on investigated properties of samples. Experiments on wastewater from tailings of lead and zinc mine Grot, Serbia, showed that after treatment with both adsorbents, the content of the most abundant heavy metals (Pb, Zn, Hg, and Mn) significantly decreased. View Full-Text
Keywords: lead; ion exchange; alginate; zeolite-alginate composite; isotherms; pH; heavy metals; tailings wastewater lead; ion exchange; alginate; zeolite-alginate composite; isotherms; pH; heavy metals; tailings wastewater
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Kragović, M.; Pašalić, S.; Marković, M.; Petrović, M.; Nedeljković, B.; Momčilović, M.; Stojmenović, M. Natural and Modified Zeolite—Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions. Minerals 2018, 8, 11.

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