Effect of indifferent electrolyte concentration, sorbent thermal treatment, pH, and the nature of ligands on the sorption of Cu(II) cations by glauconite from nitrate solution

Abstract

The effect of preliminary thermal (100–300°C) and chemical (10% HCl) treatment of 95% glauconite concentrate exerted on the sorption removal of copper (II) cations from nitrate solutions with pH in the range of 5–7, including ammonia media. The effect of indifferent electrolyte (KNO3 in a concentration of 10^–3 and 10^–2 mol/L) on the sorption of copper(II) from a 3.4 × 10^–3 M solution of Cu(NO₃)₂ has been estimated. It has been shown that a 99% level of the sorption purification from Cu²⁺ cations can be achieved.