Adsorption of methylene blue from aqueous solutions by synthetic montmorillonites of different compositions

Abstract

The sorption capacity of synthetic montmorillonites of the composition Na_2x(Al_2(1–x),Mg_2x)Si₄O₁₀(OH)₂ · nH₂O (where 0 < x < 1) in relation to the methylene blue dye has been investigated. The obtained results from the data for natural samples of montmorillonite (K10) and activated carbon have been compared. The effect of the montmorillonite composition and the medium acidity on the degree of dye adsorption has been studied. The chemical composition of montmorillonite, which is optimal for solving tasks in the field of ecology and medicine, has been determined. The character of the interaction of montmorillonites with the adsorbed substance from the point of view of the physical-chemical sorption models has also been studied.