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The effects of thiourea (TU) and formamidine disulfide (FDS) on the electrochemical dissolution of chalcopyrite in sulfuric acid solution and at ambient temperature were assessed. The corrosion current densities of a CuFeS2 electrode were estimated using electrochemical impedance spectroscopy and linear polarization. TU and FDS enhance the dissolution kinetics of CuFeS2. TU may adsorb on the surface...
The expression developed in our previous work to predict the redox potential of the quaternary H2SO4-Fe2(SO4)3-FeSO4-H2O system can still be used to predict the redox potential of the Fe3+/Fe2+ couple in more complex acidic iron sulfate solutions generated during the acidic leaching and bioleaching of Printed Circuit Boards (PCBs). This expression can also be employed to determine the ferrous and...
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