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Category: Chemistry Basics
Question: How can hexavalent chromium be removed from aqueous waste streams?
Keywords: hexavalent,trivalent,chromium,removal,precipitation,waste,ferrous,sulfate
Answer: One option is to use ferrous sulfate to reduce the hexavalent chromium to a less toxic, trivalent chromium form that will precipate out of the solution. Trivalent chromium can then be reduced by sodium hydroxide.