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(a) Release of Fe2+ ions to solution during the progression of the reaction between 1 m CrCl2, 4 m HCl, and various loadings of CuFeS2 concentrate. (b) Release of Fe2+ ions to solution during the progression of the reaction between 1 m CrCl2, 39 g L−1 CuFeS2 concentrate, and various initial concentrations of HCl. Error bars show the standard deviations of replicates in triplicate.
