Sorption of uranium(VI) from aqueous solutions by DEEA organo-volcanic: isotherms, kinetic and thermodynamic studies
| dc.contributor.author | Kaynar, ÜH | |
| dc.contributor.author | Hiçsönmez, Ü | |
| dc.contributor.author | Kaynar, SÇ | |
| dc.contributor.author | Koçak, S | |
| dc.date.accessioned | 2024-07-18T11:46:25Z | |
| dc.date.available | 2024-07-18T11:46:25Z | |
| dc.description.abstract | The sorption of the uranium(VI) ions from aqueous solutions by diethylethanolammonium organo-volcanics (Kula-TURKEY) was investigated under different experimental conditions. DEEA was used to modify the surface of basaltic volcanics. The characteristic of basaltic volcanic was analyzed by XRF, SEM-EDS, FTIR, and XRD. The BET surface areas of unmodified volcanics and DEEA-modified volcanics were found as 2.265 and 3.689 m(2)/g, respectively. The volcanic samples were treated by using different concentrations of DEEA. The adsorption of U(VI) on natural and modified volcanics was examined as a function of the contact time, initial pH of the solution, initial U(VI) concentration, and temperature. Langmuir, Freundlich, and D-R adsorption isotherms were used to describe the adsorption. While examining the adsorption percentage and distribution coefficient, these values for unmodified volcanics were found to be 25% +/- 0.76 and 10.08 mL/g, while the values for the DEEA-modified volcanics were 88% +/- 1.04 and 220 mL/g, respectively. The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data. In this study, it can be seen that the adsorption process is suitable for the pseudo-second-order kinetic model. Various thermodynamic parameters (Delta G degrees, Delta H degrees, and Delta S degrees) were calculated with the thermodynamic distribution coefficients obtained at different temperatures. The sorption process was a chemical adsorption process. The results indicated that the processes are spontaneous and endothermic. | |
| dc.identifier.issn | 1001-8042 | |
| dc.identifier.other | 2210-3147 | |
| dc.identifier.uri | http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/2716 | |
| dc.language.iso | English | |
| dc.publisher | SPRINGER SINGAPORE PTE LTD | |
| dc.subject | MODIFIED MONTMORILLONITE | |
| dc.subject | WYOMING MONTMORILLONITE | |
| dc.subject | PHENOL ADSORPTION | |
| dc.subject | REMOVAL | |
| dc.subject | SURFACES | |
| dc.subject | HEMATITE | |
| dc.subject | CLAY | |
| dc.subject | VI | |
| dc.title | Sorption of uranium(VI) from aqueous solutions by DEEA organo-volcanic: isotherms, kinetic and thermodynamic studies | |
| dc.type | Article |