Инд. авторы:	Gaskova O.L.
Заглавие:	Semiempirical model for the description of sorption equilibria on clay mineral surfaces
Библ. ссылка:	Gaskova O.L. Semiempirical model for the description of sorption equilibria on clay mineral surfaces // Geochemistry International. - 2009. - Vol.47. - Iss. 6. - P.611-622. - ISSN 0016-7029. - EISSN 1531-8397.
Внешние системы:	DOI: 10.1134/S0016702909060068; SCOPUS: 2-s2.0-67649511764;
Реферат:	eng: Based on a review of recent experimental data on heavy metal sorption on clay minerals (montmorillonite, illite, and kaolinite), a method was developed to estimate the unified characteristics of the density of surface sorption sites and constants of reactions occurring on them, such as Meaq ⇄ Mesurf. A model combining the description of ion exchange sorption in the presence of Na electrolytes and pH-dependent chemical adsorption on the amphoteric sites of the edge faces of the three mentioned phases provided a satisfactory approximation of experimental data of various authors and an approach to the understanding of the essence of differences in the properties of sorbents and behavior of metal cations. It was supposed that this approach is helpful as a reconnaissance stage during the analysis of other more complex systems (multicomponent solutions, polymineralic soils, etc.). © Pleiades Publishing, Ltd. 2009.
Ключевые слова:	pH; montmorillonite; kaolinite; ion exchange; illite; experimental mineralogy; empirical analysis; clay mineral; chemical reaction; Minerals; Silicate minerals; Mining; Kaolinite; Ion exchange; sorption; Geologic models; Adsorption; Surface sorptions; Sorption equilibria; Semiempirical models; PH-dependent; Multicomponent solutions; Mineral surfaces; Metal sorption; Metal cation; Experimental data; Complex systems; Chemical adsorption; Heavy metals;
Издано:	2009
Физ. характеристика:	с.611-622