High temperature nickel sulphide bioleaching: implications thermodynamic and kinetic

Year of Publication: 2010
Source: hydrometallurgy, in press, accepted employment, available online August 24, 2010
Flávio LS Cruz, Victor A. Oliveira, Damaris, Guimarães, D. Adelson, Souza, A. Versiani,> Leon
sulfide (Eh-pH diagrams) and kinetics (cyclic voltammetry). It was noted that the range of pH 1. 8-2. 0 the higher dissolution of nickel has been conducted that has reached 50% of the total plate and 80% for moderate thermophiles. External addition of ferrous iron had no effect on the dissolution of metal at 34 ° C, but affected the leaching of nickel at high temperature. The best results were obtained with additions FeSO4 low (2. 5g / L) at 50 ° C. Pyrrhotite. . .