Study on the Removal of Cr(VI) by Fe_3O_4/nanoscale Zero-valent Iron(Fe~0) in Wastewater

The removal of Cr(Ⅵ) by Fe3O4/nanoscale Fe0 and the effect of Fe3O4 dosage,HA dosage and temperature on it were evaluated.The experiment results indicated that 91.4% Cr(Ⅵ) could be removed by Fe3O4/nanoscale Fe0 within 2 min compared with 5.1% by bare Fe3O4 and 79.0% by bare nanoscale Fe0.And the optimal ratio of Fe3O4 to nanoscale Fe0 mass lies at 7.5:1.High temperature could increase the Cr(Ⅵ) removal efficiency.