Behavior of anions in association with metal ions under hydrometallurgical environments: Part I — OH- effect on various cations

Minerals & Metallurgical Processing , 2014, Vol. 31, No. 1, pp. 34-39

Kim, R.; Cho, H.C.; Han, K.N.

ABSTRACT:

A comprehensive analysis of the effect of OH^- on various cations in hydrometallurgical systems has been investigated. Cations chosen for this analysis included groups 1A and 2A, rare-earth elements and other common transition metal ions such as Cu²⁺, Fe²⁺, Fe³⁺, Mn²⁺, Ni²⁺, Co²⁺, Ag⁺, Cd²⁺, U⁴⁺, UO₂²⁺, Hg²⁺, Al³⁺ and Zn²⁺. The Newton-Raphson technique was used to calculate and plot various metal species over a wide range of pH.
This study has clearly shown that by adjusting the concentration of OH^-, the separation of Fe from Mn, U from V, Ce and Eu from other rare-earth elements, and In from Sn is possible. The effects of hydrated metal ions on the separation and removal of various metals from each other under various conditions is discussed.