In the current work cyclic voltammetry, capacitance associated to double-layer and
Electrochemical Impedance studies on chalcopyrite surfaces in absence and occurrence of
Na-isopropyl xanthate at highly concentrated medium in an extensive range of polarization
potentials are examined. The voltammetric response of the chalcopyrite surface displays a
passivating effect with the addition of xanthate due to its adsorption, which also impedes the
transport of oxidized species Fe 2+ and Cu 2+ outwards the mineral matrix. A large surface …