Effects of Ferrous Ions on Nitrobenzene Reduction in Zero-Valent Iron System

The reduction of nitrobenzene (ArNO₂) was investigated in a zero-valent iron(ZVI) system (Fedeg) with the addition of ferrous ions (Fe²⁺) using batch tests. The results indicated that the reductive product of nitrobenzene was not changed with the addition of Fe²⁺, and ArNO₂ was reduced to aniline by Fedeg. The reductive reaction rate of ArNO₂ was enhanced with the addition of Fe²⁺. The lepidocrocite with a flake-like structure formed the outer layer of corrosion coating. The Fe²⁺ was adsorbed on the surface of iron powder. The addition of Fe²⁺ into ZT system could favor the reduction of ArNO² in the in situ remediation of groundwater.