Experimental Study on Ammonium Ferrous Sulfate for Reduction of Chromium Slag

Chromium slag is a residue of heavy metals.Leaching of hexavalent chromium assorted with water-soluble and acid-soluble may seriously pollute the environment.Wet-method reducing is an important way to treat chromium slag.In the experiment,ferrous ammonium sulfate was used to restore the chromium leaching from the hexavalent chromium slag.The result expatiates that in the acidic range,the reduction effect of hexavalent chromium is very obvious,when the amount of ferrous ammonium sulfate put in is 1.234 times as more as the theoretical value,the leaching of hexavalent chromium can be reduced as strong as possible.During the reaction,pH,the amount of ferrous ammonium sulfate used and the reaction time exert an important influence upon the conversion of hexavalent chromium.