Study on the Effect of Ferrous Iron on the Reduction of Hexavalent Chromium in Soil

Abstract

Using iron sulfate (Fe (II)) to restore hexavalent chromium (Cr (VI)) in soil solution, while different pH, action conditions and various reaction time, to study the reduction effect of ferrous iron on hexavalent chromium in soil. It is showed that Fe (II) could restore all of Cr (VI) basically at pH=7 in anaerobic condition. At the same time, the participation of oxygen would affect the reduction ability of Fe (II) to Cr (VI) with time goes on. In the absence of oxygen condition, the reduction effect is more stable, and under aerobic conditions, the reduction effect is precarious.