Abstract:Nano-zero-valent nickel modified by Vitamin B12 was prepared by liquid phase reduction method, which was used to remove uranium U(Ⅵ) from solution. Effects of mass ratio of nanometer zero-valent nickel to Vitamin B12, pH value of solution, ratio of solid to liquid, initial mass concentration of U(Ⅵ) in solution, temperature, and time on removal of U(Ⅵ) in solution were investigated. The results show that removal rate of U(Ⅵ) is 98.54% and removal amount is 85.36 mg/g under the conditions including mass ratio of Vitamin B12 to nano-nickel of 1︰1, pH value of solution of 5.0, ratio of solid to liquid of 0.3 g/L, and reaction time of 30 min at room temperature (25 ℃).