Study of equilibrium and thermodynamic adsorption of α-picoline, β-picoline, and γ-picoline by Jordanian zeolites: Phillipsite and faujasite
| Autor: | Hanan Al Mohammad, Khalil M. Ibrahim, Najwa Nsour, Zahir Rawajfih |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Aqueous solution
Exothermic process Enthalpy Phillipsite General Chemistry Faujasite engineering.material Condensed Matter Physics Gibbs free energy chemistry.chemical_compound symbols.namesake Adsorption chemistry Mechanics of Materials engineering symbols Physical chemistry General Materials Science Picoline |
| Zdroj: | Microporous and Mesoporous Materials. 132:401-408 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2010.03.019 |
| Popis: | In the present study the ability of phillipsite and faujasite to remove a-picoline, b-picoline, andc-picoline from aqueous solution in the broad range of concentrations (1–500 mg L � 1 ) was investigated. Adsorption equilibrium was carried out at different initial concentrations, sorbent concentrations, and temperatures. Brunauer–Emmett–Teller (BET), the Harkins–Jura, the Smith, and the Halsey equations were applied to the experimental data. The data fitted the BET model best. The overall adsorption of a-, b-, and c-picoline on phillipsite and faujasite followed the order: faujasitea-picoline < phillipsitea-picoline < faujasiteb-picoline < phillipsiteb-picoline < faujasitec-picoline < phillipsitec-picoline. The values of change in Gibbs free energy (DG), enthalpy (DH), and entropy (DS) were calculated. Thermodynamic study revealed that the adsorption of picolines onto phillipsite and faujasite was an exothermic process. Isosteric heat of adsorption was found to decrease with the increase in surface loading. |
| Databáze: | OpenAIRE |
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