title: An environmentally friendly process; adsorption of radionuclide Tl-201 on fibrous waste tea.
abstract: This work presents an investigation of the adsorption of the radionuclide of Tl-201 from waste water on the fibrous tea factory waste. The experimental parameters were chosen as temperature, pH, stirring speed, adsorbent dose and nominal particle size in the ranges of 10.0-40.0 degrees C, 2.0-10.0, 300-720 rpm, 1.0-15.0 g/L and 0.15-0.71 mm, respectively. The most effective parameter on the adsorption yield was found to be pH of the solution. Fourier transforms infrared and electron paramagnetic resonance spectroscopy studies were performed for the characterisation of the adsorption on tea waste. The experimental data were found to be in good agreement with the isotherm models of Freundlich, Halsey, Handerson and Dubinin-Radushkevich. Thermodynamic analysis showed that the values of Delta G and Delta H are negative. It was obtained that the adsorption rate can be represented very well by second-order pseudo homogeneous kinetic model. All the results proved that fibrous tea plant waste makes an excellent adsorbent for Tl-201 radionuclide.
authors.affiliation: Atatürk Universitesi, Araştirma Hastanesi, Nükleer Tip Ana Bilim Dali, 25240 Erzurum, Turkey.
authors.forename: Hayrettin
authors.initials: H
authors.lastname: Eroğlu
authors.forename: Sinan
authors.initials: S
authors.lastname: Yapici
authors.forename: Ciğdem
authors.initials: C
authors.lastname: Nuhoğlu
authors.forename: Erhan
authors.initials: E
authors.lastname: Varoğlu
mesh_terms: D000327:Adsorption; D055772:Green Chemistry Technology; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008722:Methods; D011868:Radioisotopes / Q000302:isolation & purification; D013057:Spectrum Analysis; D013662:Tea; D013816:Thermodynamics; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*
chemical_list: D007220:Industrial Waste; D011868:Radioisotopes; D013662:Tea; D014875:Water Pollutants, Radioactive