Recovery of copper from solutions by highly dispersed modified aluminum silicates

Abstract

Sorption of copper ions from model solutions (1–100 mg/dm³ Cu) at pH = 5.5–9.5 and from wastewater (of the composition, mg/dm³: 0.2–0.4 Cu, 0.2–0.3 Zn, 0.3–0.4 Ni, 0.3–0.5 Fe, 0.6–0.9 Pb, 1.8 As, 0.2 Mn, 3.2 Mg) at pH = 8.5 on modified montmorillonite of the Zyryanovskoe deposit in the Naform is investigated in comparison with the known liming method. The considerable sorption capacity of highly dispersed alumosilicates (~3.0 mg-eq/g) makes it possible to acquire a precipitate with a high content of ions of heavy nonferrous metals from the precipitate and purified water with residual concentrations of metals (Cu < 0.01 mg/dm³) corresponding to discharge norms into the surrounding medium.