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To efficiently extract uranium from radioactive wastewater， using magnetic carbon nanotubes (MCNT) and titanium phosphate (TiP) as precursors， a precipitation method was used to prepare magnetic carbon nanotubes (MCNT)-titanium phosphate (TiP) composite (MCTP) for uranium adsorption. The physicochemical properties of MCNT and MCTP were characterized and analyzed using transmission electron microscopy (TEM)， Raman spectroscopy (Raman)， X-ray diffraction (XRD)， Zeta potential， and other methods. The effects of solution pH， adsorption time， initial mass concentration of U(Ⅵ)， and temperature on the adsorption of U(Ⅵ)by MCNT and MCTP were investigated. The results show that the optimal pH for MCTP adsorption of U(Ⅵ) is 6.0， which conforms to the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Adsorption equilibrium can be reached within 180 minutes， and the saturated adsorption capacity of U(Ⅵ)reached 264.76 mg/g; When Cd(Ⅱ)， Cu(Ⅱ)， As(Ⅴ)， and Sr(Ⅱ) coexist with U(Ⅵ)， the adsorption relative selectivity coefficient of MCTP for U(Ⅵ) are all higher than 2.0.The FT-IR and XPS analysis results indicate that P=O and P—O—H are the core functional groups that coordinate to U(Ⅵ).At pH 5.0 and 6.0，the removal rate of U(Ⅵ) by MCTP are both better than 99.3%for the real wastewater， in which concentrations of anionic Cl-and SO42- are 744.0 and 251 mg/L， respectively. MCTP combines high adsorption capacity， selectivity， and magnetic separation properties， demonstrating promising application prospects in the treatment of radioactive uranium-containing wastewater.
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Basic Information:
China Classification Code:TQ424;X703
Citation Information:
[1]ZHANG Wenjun,ZHOU Liang,FU Yuqin ,et al.Adsorption Performance of Magnetic Carbon Nanotubes Loaded with Titanium Phosphate for Uranium[J].Hydrometallurgy of China().
2026-09-17
2026-09-17
2026-09-17