The wastewater presents a high conductivity due to chloride, sulfate, sodium,
calcium and residual concentrations of copper, zinc and nickel species. According to all-inorganic species
evaluated, the molar fraction of Zn2+, Cu2+ and Ni2+ is near 92% and the remaining species are ZnCl+,
ZnSO4, CuSO4, NiCl+ and NiSO4.