• 文献标题:   Metal-organic frameworks (MIL-68) decorated graphene oxide for highly efficient enrichment of uranium
  • 文献类型:   Article
  • 作  者:   ZHU JH, ZHANG HS, LIU Q, WANG C, SUN ZY, LI RM, LIU PL, ZHANG ML, WANG J
  • 作者关键词:   metalorganic framework, graphene oxide, uranium vi adsorption
  • 出版物名称:   JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
  • ISSN:   1876-1070 EI 1876-1089
  • 通讯作者地址:   Harbin Engn Univ
  • 被引频次:   5
  • DOI:   10.1016/j.jtice.2019.01.008
  • 出版年:   2019

▎ 摘  要

A novel adsorbent, metal organic framework (MIL-68) decorated graphene oxide (MIL-68/GO) composites were prepared in this study. The synthesized sorbent was well-characterized by Transmission Electron Microscope (TEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR), which confirmed the MIL-68/GO composites were synthesized successfully. The effects of initial uranium (VI) concentration, temperature, pH and contact time on uranium (VI) sorption behaviour were systematically studied by a series of adsorption experiments. The results showed that the optimal pH was 8. The Langmuir model showed better correlation with the isotherm data, the maximum adsorption capacity was 594.66 mg/g at 298.15 K. The adsorption process fitted well with a pseudo-second-order model. Furthermore, the MIL-68/GO composites also showed good adsorption properties in simulated seawater. At the uranium(VI) concentration 3 mu g/L with multi-coexisting metal ions, the distribution coefficient (K-d) value of uranium(VI) was 2.29 x 10(4) mL/g, which determined that MIL-68/GO composites were a promising material for the enrichment of uranium(VI). (C) 2019 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers.