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 SM ISO690:2012ZELENTSOV, Veaceslav, DATSKO, Tatiana. Modelling of kinetics of fluorine adsorption onto modified diatomite. In: Scientific Study and Research: Chemistry and Chemical Engineering, Biotechnology, Food Industry, 2017, nr. 1(18), pp. 85-95. ISSN 1582-540X. |
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  Scientific Study and Research: Chemistry and Chemical Engineering, Biotechnology, Food Industry |
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| Numărul 1(18) / 2017 / ISSN 1582-540X | ||||||
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| Pag. 85-95 | ||||||
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The paper presents kinetics modelling of adsorption of fluorine onto modified diatomite, its fundamental characteristics and mathematical derivations. Three models of defluoridation kinetics were used to fit the experimental results on adsorption fluorine onto diatomite: the pseudo-first order model Lagergren, the pseudo-second order model G. McKay and H.S. Ho and intraparticle diffusion model of W.J. Weber and J.C. Morris. Kinetics studies revealed that the adsorption of fluorine followed second-order rate model, complimented by intraparticle diffusion kinetics. The adsorption mechanism of fluorine involved three stages - external surface adsorption, intraparticle diffusion and the stage of equilibrium. |
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| Cuvinte-cheie adsorption, diatomite, fluorine, Kinetic models |
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