Sorption of Metal Ions on Alumina.

Precipitation and adsorption of metal ions (Co(II), Ni(II), Cu(II), and Cr(III)) on gamma-alumina were investigated experimentally. A surface chemical reaction model to calculate concentrations of aluminum ions, metal ions, and pH as variables depending on amount of alumina, volume of liquid and gas phase, initial metal concentration, and amount of acid or base added is presented. In the case of Co(II) the pH dependence of rest concentrations with and without alumina is equal; adsorption may be disregarded.