Analysis of Sorption Activity of Apple Pectin Modified with Organic Pharmacophores in Relation to d-Metal Cations (Cu2+, Co2+, and Mn2+)

摘要

The results of studying the sorption of d-metal cations (Cu2+, Co2+, and Mn2+) from aqueous solutions of their salts by sorbents based on apple pectin modified with organic pharmacophores (salicylic, anthranilic, 5-aminosalicylic, and nicotinic acids) are presented. The influence of the structure of the introduced pharmacophore into the pectin matrix on the kinetics and thermodynamics of the distribution of d-metal ions in the aqueous-solution-biopolymer-sorbent heterophase system was determined. An increase in the efficiency of extraction of d-metal ions by pharmacophore-containing pectin sorbents was revealed in comparison with the initial polysaccharide. The optimal conditions for the sorption of Cu2+, Co2+, and Mn2+ ions by the studied sorbents (phase contact time, medium pH, temperature) were selected. A mechanism for the interaction of d-metal ions with a modified pectin sorbent has been proposed.