Sorption of Cobalt(II) and Copper(II) Ions by Highly Cross-Linked Carboxyl Cation Exchangers from Natural Waters with High Salt Background

Abstract

The equilibrium and dynamics of sorption of Co2+ and Cu2+ ions have been investigated on highly cross-linked carboxyl cation exchangers of gel (KB-125P) and macroreticular (KB-2E-10) structure from solutions with an ionic strength of 0.1 and 1. It has been established that there is a weak effect of salt background concentration on selectivity of ion sorption in static conditions. In dynamic conditions with increased levels of background electrolytes, there is a decrease in the degree of ion exchanger layer KB-2E-10, which indicates a decrease in the selectivity of sorption. For the cation exchanger KB-125P, on the contrary, there is an increase in the degree of the layer use. It has been concluded that the gel structure of the sorbent KB-125P provides selective sorption of Co2+ and Cu2+ ions from solutions with high salt background. Coloring of cation exchangers layer KB-125P and KB-2E-10 in the absorption of Cu2+ and Co2+ makes it possible to create effective indicator tubes on their basis.