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Disposal of Chromite Ore Processing Residue (COPR) is a major concern from an environmental point of view because it consists mainly of Cr(VI) in addition to Cr(III). Cr(VI) is more soluble and mobile when compared to Cr(III). The study primarily concentrated on treatment of COPR using solidification and stabilization (S/S) process. Prior to the S/S process, there was a need for reduction of Cr(VI)...