Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies
In the present study, natural bentonite and acid-thermal co-modified bentonite were utilized for Acid Blue 25 (AB25) removal. The adsorption experiments were executed at the temperature values of 298K, 308K and 318K. According to the results, Freundlich isotherm becomes more convenient model compare...
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| Format: | Article |
| Language: | English |
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Pamukkale University
2020-12-01
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| Series: | Pamukkale University Journal of Engineering Sciences |
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| Online Access: | https://dergipark.org.tr/tr/pub/pajes/issue/58015/834512 |
| _version_ | 1828021648677142528 |
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| author | Ali Rıza Kul Adnan Aldemir |
| author_facet | Ali Rıza Kul Adnan Aldemir |
| author_sort | Ali Rıza Kul |
| collection | DOAJ |
| description | In the present study, natural bentonite and acid-thermal co-modified bentonite were utilized for Acid Blue 25 (AB25) removal. The adsorption experiments were executed at the temperature values of 298K, 308K and 318K. According to the results, Freundlich isotherm becomes more convenient model compared with Langmuir and Temkin model. Freundlich model coefficients rise when the temperature increases. Kinetic coefficients were calculated by pseudo first order (PFO) and pseudo second order (PSO) models. Coefficients of R2 evaluated were higher than 0.99 with experimental and obtained qe values close to each other explained that this process fits PSO kinetic model. The concentration of AB25 elevates from 30 to 80 mg/L adsorption capacity onto natural, acid-thermal co-modified bentonite increases from 8.36 to 27.00 mg/g and 9.30 to 29.09 mg/g for 298 K, respectively. Absolute values of free energy of AB25 onto natural and acid-thermal co-modified bentonite changes from 4.065 kJ/mol to 8.586 kJ/mol, respectively. Enthalpy values of AB25 onto natural and acid-thermal co-modified bentonite changes from 5.483 kJ/mol to 11.249 kJ/mol and entropy values of AB25 on natural and acid-thermal co-modified bentonite changes from 4.759 J/mol K to 8.940 J/mol K, respectively. It was also found that modified bentonite has higher adsorption capacity than natural bentonite. |
| first_indexed | 2024-04-10T11:56:18Z |
| format | Article |
| id | doaj.art-d64a2e05cc4446438019088016464a28 |
| institution | Directory Open Access Journal |
| issn | 1300-7009 2147-5881 |
| language | English |
| last_indexed | 2024-04-10T11:56:18Z |
| publishDate | 2020-12-01 |
| publisher | Pamukkale University |
| record_format | Article |
| series | Pamukkale University Journal of Engineering Sciences |
| spelling | doaj.art-d64a2e05cc4446438019088016464a282023-02-15T16:16:47ZengPamukkale UniversityPamukkale University Journal of Engineering Sciences1300-70092147-58812020-12-0126713351342218Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studiesAli Rıza Kul0Adnan Aldemir1Van Yüzüncü Yıl UniversityVan Yüzüncü Yıl UniversityIn the present study, natural bentonite and acid-thermal co-modified bentonite were utilized for Acid Blue 25 (AB25) removal. The adsorption experiments were executed at the temperature values of 298K, 308K and 318K. According to the results, Freundlich isotherm becomes more convenient model compared with Langmuir and Temkin model. Freundlich model coefficients rise when the temperature increases. Kinetic coefficients were calculated by pseudo first order (PFO) and pseudo second order (PSO) models. Coefficients of R2 evaluated were higher than 0.99 with experimental and obtained qe values close to each other explained that this process fits PSO kinetic model. The concentration of AB25 elevates from 30 to 80 mg/L adsorption capacity onto natural, acid-thermal co-modified bentonite increases from 8.36 to 27.00 mg/g and 9.30 to 29.09 mg/g for 298 K, respectively. Absolute values of free energy of AB25 onto natural and acid-thermal co-modified bentonite changes from 4.065 kJ/mol to 8.586 kJ/mol, respectively. Enthalpy values of AB25 onto natural and acid-thermal co-modified bentonite changes from 5.483 kJ/mol to 11.249 kJ/mol and entropy values of AB25 on natural and acid-thermal co-modified bentonite changes from 4.759 J/mol K to 8.940 J/mol K, respectively. It was also found that modified bentonite has higher adsorption capacity than natural bentonite.https://dergipark.org.tr/tr/pub/pajes/issue/58015/834512acid blue 25adsorptionbentoniteisotherm modelkinetic coefficientthermodynamic parameter |
| spellingShingle | Ali Rıza Kul Adnan Aldemir Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies Pamukkale University Journal of Engineering Sciences acid blue 25 adsorption bentonite isotherm model kinetic coefficient thermodynamic parameter |
| title | Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies |
| title_full | Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies |
| title_fullStr | Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies |
| title_full_unstemmed | Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies |
| title_short | Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies |
| title_sort | comparison of acid blue 25 adsorption performance on natural and acid thermal co modified bentonite isotherm kinetics and thermodynamics studies |
| topic | acid blue 25 adsorption bentonite isotherm model kinetic coefficient thermodynamic parameter |
| url | https://dergipark.org.tr/tr/pub/pajes/issue/58015/834512 |
| work_keys_str_mv | AT alirızakul comparisonofacidblue25adsorptionperformanceonnaturalandacidthermalcomodifiedbentoniteisothermkineticsandthermodynamicsstudies AT adnanaldemir comparisonofacidblue25adsorptionperformanceonnaturalandacidthermalcomodifiedbentoniteisothermkineticsandthermodynamicsstudies |