Adsorption of Ga-67 radionuclide on fibrous waste tea

  • Dr Hayrettin Eroglu, Ataturk University, Medical School, Dept. of Nuclear Medicine, Erzurum, Turkey
  • Dr Erhan Varoglu, Ataturk University, Medical School, Dept. of Nuclear Medicine, Erzurum, Turkey
  • Dr Sinan Yapici, Ataturk University, Faculty of Engineering, Dept. of Chemical Engineering, Erzurum, Turkey
  • Dr Ali Sahin, Ataturk University, Medical School, Dept. of Nuclear Medicine, Erzurum, Turkey

    • This work presents an investigation on the use fibereous tea waste (FTW) as adsorbent for the adsorption of radioactive ions of Gallium-67, which is one of the most widely used radionuclides in nuclear medicine, from waste water. The experimental parameters were chosen as temperature, pH, stirring speed, adsorbent dose and nominal particle size in the ranges of 10.0-40.0 0C, 2.0-10.0, 300-720 rpm, 1.0-15.0 g/L, 0.15-0.71 mm, respectively. The most effective parameter was found to be pH of the solution and then the adsorption dose. Adsorption yield increased with temperature. A high biosorption yield of 99.1 was obtained. Fourier transform infrared and (FTIR) was performed for the characterisation of the adsorption mechanism of FTW. The experimental data were found to be in good agreement with isotherm models of Freundlich, Halsey, Handerson, Smith and Dubinin-Radushkevich. Thermodynamic analysis gave negative values of G, and a positive value of H. It was obtained that the adsorption rate can be represented very well by second order pseudo homogeneous kinetic model. All the results proved that rose FTW makes an excellent adsorbent for 67Ga.