Adsorption of Cr (III) Ions on the Surface of Diatomite

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The conditions of adsorption of Cr3 + ions at the surface of diatomite are optimized. It was shown that the adsorption of Cr3 + ions on diatomite depending on the initial concentration is 1,8-6,9 mg /g, which is caused by the occurrence of the ion exchange reaction between the silanol groups of diatomite and Cr (III) ions. The effect of pH on the binding of Cr3 + ions with diatomite was studied. It was established that acidification of the medium leads to a decrease in the degree of extraction of Cr3 + ions from solutions, due to protonation of SiOH-groups of the diatomite surface with H + ions of acids to SiOH2+. It is suggested that, along with the adsorption of Cr3 + ions on the surface of diatomite heterocoagulation of diatomite particles and hydroxocomplexes of Cr3 + ions is possible.

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41-45

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April 2015

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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[1] E.M. Duraia, M.M. Burkitbaev, H. Mohamedbakr, Z.A. Mansurov, S. Tokmoldin, G.W. Beal, Vacuum 84: 464, (2010).

DOI: 10.1016/j.vacuum.2009.09.012

Google Scholar

[2] M. Yavuz, F. Gode, E. Pehlivan, S. Ozmert, Y.C. Sharma, An economic removal of Cu2+ and Cr3+ on the new adsorbents: Pumice and polyacrylonitrile/pumice composite. Chemical Engineering Journal 137 (2008) 453-461.

DOI: 10.1016/j.cej.2007.04.030

Google Scholar

[3] K. Korzhynbaeva, S. Tazhibayeva, K. Musabekov, M. Mataev, O. Zhanadilov, Preparation of magnetic compositions of diatomite, Applied mechanics and materials, vol. 467 (2014) 97-102.

DOI: 10.4028/www.scientific.net/amm.467.97

Google Scholar

[4] O. Mokrousova, V. Moraru, The effect of Montmorillonite Modification by Cr(III)-Compounds on the Electrokinetic Properties of its Aqueous Dispersions, Scientific Journal of Technical University: Material science and applied chemistry, 21 (2010).

Google Scholar

[5] O. Rashmi, D.S. Ramteke, P.U. Meshram, Clay Intercalation Compound: Chromium removal study, International Journal of Research in Chemistry and Environment, vol. 2 Issue 2 (2012) 83-87.

Google Scholar

[6] M.H. Koppelman, A.B. Emerson, J.G. Dillard, Adsorbed Cr(III) on chlorite, illite, and kaolinite: an X-ray photoelectron spectroscopic study. Clays and Clay Minerals, vol. 28 (1980), 119-124.

DOI: 10.1346/ccmn.1980.0280207

Google Scholar

[7] I.P. Okoye, C. Obi , S.E. Otolo, A study of the adsorption kinetics of chromium pillared bentonite clay mineral. Journal of applied technology in environmental sanitation, vol. 2 (2012) 145-154.

Google Scholar