DefinePK

Abstract

There is determined the dependence of colloid-chemical properties of the natural and modified montmorillonite clays from “Polyana” deposit in Shebekinsky district, Belgorod Region, Russian Federation, on their material composition, i.е. on their chemical, mineral and granulometric composition. It is shown that cation-substitution in the inter-pack positions of montmorillonite results in the increase of clay's sorption capacity and its natric form can be used for the efficient water purifying from iron ions (III). It has been observed the high adsorption rate of Fe3+ ions within the first five minutes of purifying water solutions, which is conditioned by increase of exchange cations content, increase of sorbent's specific surface and alteration of zeta-potential towards the negative range at beneficiation and modification. It has been detected that sorption of Fe3+ ions by natural and modified clays is determined by processes of ion exchange and are of chemosorption nature predominantly.