Recent laboratory testing on a copper–gold ore containing pyrite showed that Aerofloat 7249 achieved the highest gold recovery (Forrest et al., 2001). Aerofloat 6697 provided the best gold concentrate grade at pH values <, while Aerofloat 7249 and Aerofloat 208 were better at pH values >, and gold grades in excess of 250 g/t were generated.
glycine solutions was studied. The adsorption rate for both gold and copper at the initial stage was modelled using the Fleming k,n adsorption kinetic model. The coeﬃcient of variation (R2) of the model were close to unity for both gold and copper adsorption data. The eﬀects of pH, free glycine, ionic strength, initial gold and copper