Synthesis Of Iron-based Magnetic Materials And Their Adsorption Properties Of Uranium

With the continuous development of society industrialization,the human demand for energy is growing.Energy shortages has become increasingly more attention from the countries all over the world,Because the traditional energy fuel dwindling,nuclear energy become the main choice of all countries in the world.The development of nuclear energy,the uranium resource shortage and environmental pollution has become the main problem of restricting its development.In uranium ore mining and smelting process and fuel combustion to produce large amounts of uranium waste liquid,extraction and recovery technology of uranium in the solution of the research to our country the development of nuclear power,better utilization of uranium resources and environmental protection in areas such as the model is of great significance.In this paper the preparation of many kinds of iron-based magnetic adsorption material,And study the adsorption material under different experimental conditions on the adsorption of uranium in water.Preparation of CoFe2O4 hollow microspheres by solvothermal method and approximate size of 0.5?m.The saturation magnetization of CoFe₂O₄ hollow microspheres is 71.70 emu/g.The products characterized by SEM,TEM and VSM,The results show that the saturation magnetization CoFe2O4 hollow microspheres synthesized with hydrothermal temperature of180 ^oC for 24 h has the hightest crystallinity.The results show that the CoFe₂O₄ hollow microspheres has excellent adsorption ability of uranium,when pH value is equal to 6.0,the maximum adsorption capacity of CoFe2O4 hollow microspheres removal efficiency of 96.01%.The experimental data are fitted well by Langmuir model and pseudo-second-order equation.We prepared macroporous CoFe2O4 are synthesized by sol-gel method with egg white as ligand?The saturation magnetization of macroporous CoFe₂O₄ is 2.78 emu/g.The products characterized by SEM,TEM and VSM,The results show that the saturation magnetization macroporous CoFe₂O₄ synthesized with hydrothermal temperature of 500 ^oC for 4 h has the hightest crystallinity.The results show that the macroporous CoFe2O4 has excellent adsorption ability of uranium,The maximum adsorption capacity of uranium by macroporous CoFe2O4 is observed at pH=5.0.The adsorption of uranium?VI?reaches equilibrium after120 min and follows pseudo-second-order kinetics and Langmuir model.We prepared magnetic Sugarcane bagasse are synthesized by coprecipitation method?The products characterized by SEM,TEM and VSM,The results show that the saturation magnetization magnetic Sugarcane bagasse is 36.4 emu/g.The maximum adsorption capacity of uranium by magnetic Sugarcane bagasse pH=5.0,the maximum adsorption capacity of magnetic Sugarcane bagasse removal efficiency of 97.9%.The experimental data are fitted well by a pseudo-second-order equation and Langmuir model.We prepared MSCB by EDTA surface modification?The products characterized by SEM,TEM and VSM,The results show that the saturation magnetization MSCB is 36.4 emu/g.The maximum adsorption capacity of uranium by MSCB pH=5.0,the maximum adsorption capacity of MSCB removal efficiency of 99.32%.The experimental data are fitted well by a pseudo-second-order equation and Langmuir model.