Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling
Abstract In this research, the removal of 2,4 dinitrophenol, 2 nitrophenol and 4 nitrophenol from aqueous solution using char ash from animal bones was investigated using batch technique. Three 2-parameter isotherms (Freundlich, Langmuir, and Temkin) were applied to analyze the experimental data. Bo...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-01-01
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| Series: | Applied Water Science |
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| Online Access: | http://link.springer.com/article/10.1007/s13201-018-0666-1 |
| _version_ | 1819150507484119040 |
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| author | Yehia M. Magdy Hossam Altaher E. ElQada |
| author_facet | Yehia M. Magdy Hossam Altaher E. ElQada |
| author_sort | Yehia M. Magdy |
| collection | DOAJ |
| description | Abstract In this research, the removal of 2,4 dinitrophenol, 2 nitrophenol and 4 nitrophenol from aqueous solution using char ash from animal bones was investigated using batch technique. Three 2-parameter isotherms (Freundlich, Langmuir, and Temkin) were applied to analyze the experimental data. Both linear and nonlinear regression analyses were performed for these models to estimate the isotherm parameters. Three 3-parameter isotherms (Redlich-Peterson, Sips, Toth) were also tested. Moreover, the kinetic data were tested using pseudo-first order, pseudo-second order, Elovich, Intraparticle diffusion and Boyd methods. Langmuir adsorption isotherm provided the best fit for the experimental data indicating monolayer adsorption. The maximum adsorption capacity was 8.624, 7.55, 7.384 mg/g for 2 nitrophenol, 2,4 dinitrophenol, and 4 nitrophenol, respectively. The experimental data fitted well to pseudo-second order model suggested a chemical nature of the adsorption process. The R 2 values for this model were 0.973 up to 0.999. This result with supported by the Temkin model indicating heat of adsorption to be greater than 10 kJ/mol. The rate controlling step was intraparticle diffusion for 2 nitrophenol, and a combination of intraparticle diffusion and film diffusion for the other two phenols. The pH and temperature of solution were found to have a considerable effect, and the temperature indicated the exothermic nature of the adsorption process. The highest adsorption capacity was obtained at pH 9 and 25 °C. |
| first_indexed | 2024-12-22T14:18:36Z |
| format | Article |
| id | doaj.art-8b11d74ad7e748ac9f088ae7560ef30f |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-12-22T14:18:36Z |
| publishDate | 2018-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-8b11d74ad7e748ac9f088ae7560ef30f2022-12-21T18:23:02ZengSpringerOpenApplied Water Science2190-54872190-54952018-01-018111510.1007/s13201-018-0666-1Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modelingYehia M. Magdy0Hossam Altaher1E. ElQada2Department of Chemical Engineering, Faculty of Engineering, El-Minia UniversityCollege of Health Sciences, Jumeira UniversityDepartment of Chemical Engineering Technology, Yanbu Industrial CollegeAbstract In this research, the removal of 2,4 dinitrophenol, 2 nitrophenol and 4 nitrophenol from aqueous solution using char ash from animal bones was investigated using batch technique. Three 2-parameter isotherms (Freundlich, Langmuir, and Temkin) were applied to analyze the experimental data. Both linear and nonlinear regression analyses were performed for these models to estimate the isotherm parameters. Three 3-parameter isotherms (Redlich-Peterson, Sips, Toth) were also tested. Moreover, the kinetic data were tested using pseudo-first order, pseudo-second order, Elovich, Intraparticle diffusion and Boyd methods. Langmuir adsorption isotherm provided the best fit for the experimental data indicating monolayer adsorption. The maximum adsorption capacity was 8.624, 7.55, 7.384 mg/g for 2 nitrophenol, 2,4 dinitrophenol, and 4 nitrophenol, respectively. The experimental data fitted well to pseudo-second order model suggested a chemical nature of the adsorption process. The R 2 values for this model were 0.973 up to 0.999. This result with supported by the Temkin model indicating heat of adsorption to be greater than 10 kJ/mol. The rate controlling step was intraparticle diffusion for 2 nitrophenol, and a combination of intraparticle diffusion and film diffusion for the other two phenols. The pH and temperature of solution were found to have a considerable effect, and the temperature indicated the exothermic nature of the adsorption process. The highest adsorption capacity was obtained at pH 9 and 25 °C.http://link.springer.com/article/10.1007/s13201-018-0666-1AdsorptionCharIsothermsKinetic modelsPhenolsWastewater treatment |
| spellingShingle | Yehia M. Magdy Hossam Altaher E. ElQada Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling Applied Water Science Adsorption Char Isotherms Kinetic models Phenols Wastewater treatment |
| title | Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling |
| title_full | Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling |
| title_fullStr | Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling |
| title_full_unstemmed | Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling |
| title_short | Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling |
| title_sort | removal of three nitrophenols from aqueous solutions by adsorption onto char ash equilibrium and kinetic modeling |
| topic | Adsorption Char Isotherms Kinetic models Phenols Wastewater treatment |
| url | http://link.springer.com/article/10.1007/s13201-018-0666-1 |
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