Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants
The Dubinin-Radushkevich (DR) isotherm is a well-established model for describing adsorption equilibria in vapor-solid systems. Its adaptation for liquid-solid systems, especially in water contaminant adsorption research, has led to several modified forms. In this study, we refer to the original for...
Saved in:
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
American Chemical Society
2025
|
| Subjects: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my.uniten.dspace-36464 |
|---|---|
| record_format |
dspace |
| spelling |
my.uniten.dspace-364642025-03-03T15:42:33Z Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants Chu K.H. Hashim M.A. Hayder G. Bollinger J.-C. 7402453718 7005780117 56239664100 35546414700 Adsorption isotherms Adsorption equilibrium Comparative evaluations Dubinin-Radushkevich Dubinin-Radushkevich equations Liquid-solid system Saturation concentration Solid systems Term enhancing Vapor-solid Water contaminants Specific energy The Dubinin-Radushkevich (DR) isotherm is a well-established model for describing adsorption equilibria in vapor-solid systems. Its adaptation for liquid-solid systems, especially in water contaminant adsorption research, has led to several modified forms. In this study, we refer to the original formulation as the traditional DR equation, which incorporates a term representing saturation concentration. A simplified variant eliminates the need for this term, enhancing practicality. Additionally, three other variants address dimensional inconsistencies identified in a previous DR adaptation. This study evaluates the performance of the traditional DR equation and these four variants in characterizing the adsorption of antibiotic contaminants�specifically tetracycline, sulfamethoxazole, and ciprofloxacin�from aqueous solutions using published data. Notable differences emerge in the fit of each equation to the data and in the estimation of key parameters such as maximum adsorption capacity and characteristic energy of adsorption. To address these discrepancies, we introduce the Dubinin-Radushkevich-Misra (DRM) equation, a lesser-known variant. Preliminary results suggest that the DRM equation provides a promising alternative, yielding robust data fits and parameter estimates that align closely with experimental values. ? 2024 American Chemical Society. Final 2025-03-03T07:42:33Z 2025-03-03T07:42:33Z 2024 Article 10.1021/acs.iecr.4c01895 2-s2.0-85202884610 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202884610&doi=10.1021%2facs.iecr.4c01895&partnerID=40&md5=47571fe05af2cbf1b166a773df0ea681 https://irepository.uniten.edu.my/handle/123456789/36464 63 34 15002 15011 American Chemical Society Scopus |
| institution |
Universiti Tenaga Nasional |
| building |
UNITEN Library |
| collection |
Institutional Repository |
| continent |
Asia |
| country |
Malaysia |
| content_provider |
Universiti Tenaga Nasional |
| content_source |
UNITEN Institutional Repository |
| url_provider |
http://dspace.uniten.edu.my/ |
| topic |
Adsorption isotherms Adsorption equilibrium Comparative evaluations Dubinin-Radushkevich Dubinin-Radushkevich equations Liquid-solid system Saturation concentration Solid systems Term enhancing Vapor-solid Water contaminants Specific energy |
| spellingShingle |
Adsorption isotherms Adsorption equilibrium Comparative evaluations Dubinin-Radushkevich Dubinin-Radushkevich equations Liquid-solid system Saturation concentration Solid systems Term enhancing Vapor-solid Water contaminants Specific energy Chu K.H. Hashim M.A. Hayder G. Bollinger J.-C. Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| description |
The Dubinin-Radushkevich (DR) isotherm is a well-established model for describing adsorption equilibria in vapor-solid systems. Its adaptation for liquid-solid systems, especially in water contaminant adsorption research, has led to several modified forms. In this study, we refer to the original formulation as the traditional DR equation, which incorporates a term representing saturation concentration. A simplified variant eliminates the need for this term, enhancing practicality. Additionally, three other variants address dimensional inconsistencies identified in a previous DR adaptation. This study evaluates the performance of the traditional DR equation and these four variants in characterizing the adsorption of antibiotic contaminants�specifically tetracycline, sulfamethoxazole, and ciprofloxacin�from aqueous solutions using published data. Notable differences emerge in the fit of each equation to the data and in the estimation of key parameters such as maximum adsorption capacity and characteristic energy of adsorption. To address these discrepancies, we introduce the Dubinin-Radushkevich-Misra (DRM) equation, a lesser-known variant. Preliminary results suggest that the DRM equation provides a promising alternative, yielding robust data fits and parameter estimates that align closely with experimental values. ? 2024 American Chemical Society. |
| author2 |
7402453718 |
| author_facet |
7402453718 Chu K.H. Hashim M.A. Hayder G. Bollinger J.-C. |
| format |
Article |
| author |
Chu K.H. Hashim M.A. Hayder G. Bollinger J.-C. |
| author_sort |
Chu K.H. |
| title |
Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| title_short |
Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| title_full |
Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| title_fullStr |
Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| title_full_unstemmed |
Comparative Evaluation of the Dubinin-Radushkevich Isotherm and Its Variants |
| title_sort |
comparative evaluation of the dubinin-radushkevich isotherm and its variants |
| publisher |
American Chemical Society |
| publishDate |
2025 |
| _version_ |
1825816273778376704 |
| score |
13.244413 |