Abstract:Zero valent iron was synthesized by liquid phase reduction method and loaded on hydroxyapatite, and stable quartz sand loaded Fe0-HAP composites was obtained applying quartz sand as skeleton. Static test method was used to investigate effect of different particle size of quartz sand loaded Fe0-HAP composites on treatment of U(Ⅵ) in uranium-bearing wastewater under different conditions, such as time, initial concentration of uranium, dosage, and pH value. The results show that quartz sand loaded Fe0-HAP composite has good effect on treatment of U(Ⅵ) in uranium-bearing wastewater. When dosage of composite with particle size of 0.30-0.60 mm, 0.60-1.18 mm and 1.18-2.36 mm is 0.1 g, 0.1 g, 0.2 g respectively, and reaction time is 160 min, removal rate of U(Ⅵ) in uranium-bearing wastewater is 80.60%-90.38% and adsorption capacity is 8.060-9.038 mg/g. Removal of U(Ⅵ) from uranium-bearing wastewater by quartz sand loaded Fe0-HAP composites is more consistent with pseudo-second-order kinetic model and Langmuir adsorption isotherm model.