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C/Co of aqueous Cr(VI) concentration over time with Pd-BnM/H2 gas in a model 0.5 mM Cr(VI) solution (a) and 0.5 mM Cr(VI) COPR leachate (c), and Pd-BnM/100 mM formate in a model Cr(VI) solution (b) and COPR leachate (d). Note the different time scale used for (d).
