THERMODYNAMICS OF FLUORINE ADSORPTION ONTO MODIFIED TREPEL

Autor/autori: Veaceslav ZELENTSOV, Tatiana DATSKO (Rep. Moldova)


Abstract: The effect of temperature on the equilibrium adsorption of fluorine from aqueous solution using modified trepel was investigated. The equilibrium adsorption data were analyzed using widely applied isotherms; Langmuir and Freundlich isotherm. A nonlinear method was used for comparing the best fitting of the isotherms. Best fits were found to be Langmuir isotherm. Thermodynamic parameters, such as ????G°, ????H°, and ????S°,, were calculated using adsorption equilibrium constant obtained from the Langmuir isotherm. Results suggested that the fluorine adsorption on modified trepel was a spontaneous and endothermic process.

Keywords: sorption; fluorine; modified trepel; thermodynamic parameters

 

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