Synthesis and characterization of UTSA-76 metal organic framework containing Lewis basic sites for the liquid-phase adsorption of UVI


Öztürk M., Zorer Ö. S. , Gülcan M.

Colloids and Surfaces A: Physicochemical and Engineering Aspects, cilt.609, 2021 (SCI Expanded İndekslerine Giren Dergi) identifier

  • Cilt numarası: 609
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.colsurfa.2020.125663
  • Dergi Adı: Colloids and Surfaces A: Physicochemical and Engineering Aspects

Özet

© 2020 Elsevier B.V.UTSA-76 encoded MOF structure containing Lewis basic groups was efficiently synthesized and characterized for the removal of UVI from the liquid phase by using adsorption technique. 1H, 13C-NMR, FT-IR, P-XRD, TEM, TEM-EDX, BET, SEM and SEM-EDX mapping techniques were applied to define this adsorbent material. Adsorption of UVI on the synthesized UTSA-76 structure was investigated depending on the parameters of pH, temperature, mixing time and solution concentrations. In the kinetic of adsorption process, not only the pseudo-second-order kinetic, but also film diffusion was effective. The adsorption equilibrium of UVI on UTSA-76 explained better by Langmuir isotherm model and the qmax from Langmuir isotherm was calculated as 91.31 mg/g. The synthesized MOF structure (UTSA-76) demonstrated a removal rate from 12 ppm to 0.25 ppm in 45 min to a very low UO22+ ion concentration of about 98 % using a low adsorbent mass of 5 mg, and UTSA-76 with this adsorption performance will be among the highly preferred effective adsorbents for uranium adsorption.