Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk
Activated carbon from an agriculture by-product (rice husk) was prepared by carbonization at 500°C (50°C/15 min) followed by activation at 850°C for 1 h. The adsorption of phenolic compounds onto this activated carbon was studied using batch adsorber methods. The experimental results showed that the...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2008-04-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361708786036070 |
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| author | Mamdouh M. Nassar Yehia H. Magdy Abd El Hakim Daifullah H. Kelany |
| author_facet | Mamdouh M. Nassar Yehia H. Magdy Abd El Hakim Daifullah H. Kelany |
| author_sort | Mamdouh M. Nassar |
| collection | DOAJ |
| description | Activated carbon from an agriculture by-product (rice husk) was prepared by carbonization at 500°C (50°C/15 min) followed by activation at 850°C for 1 h. The adsorption of phenolic compounds onto this activated carbon was studied using batch adsorber methods. The experimental results showed that the prepared activated carbon removed phenolic compounds effectively from aqueous solution. Analysis of the contact time data gave an indication of the mechanism. The external mass-transfer constant, k f , involved in the adsorption process was determined using different initial adsorbate concentrations (C 0 ) and adsorbent masses (M). The following relationships were obtained: k f = 0.0023(M) −0.55 and k f = 0.0006(C 0 ) 0.17 . A macropore rate parameter for intraparticle diffusion, k p , was defined and used to correlate the experimental data via the following expression: k p = 0.183(C 0 ) 0.48 . A twin-resistance mass-transfer model based on external mass transfer and pore diffusion was applied successfully to the system under investigation. Concentration decay curves were predicted using a single modified mass-transfer coefficient, k f , and a single effective diffusion coefficient, D eff , for studies involving variable adsorbent masses and initial adsorbate concentrations. |
| format | Article |
| id | doaj-art-6b241ad0db1048cd933268ba08d9d9cc |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2008-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-6b241ad0db1048cd933268ba08d9d9cc2025-01-02T22:37:58ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382008-04-012610.1260/026361708786036070Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice HuskMamdouh M. Nassar0Yehia H. Magdy1Abd El Hakim Daifullah2H. Kelany3 Chemical Engineering Department, Faculty of Engineering, El-Minia University, El-Minia, Egypt Chemical Engineering Department, Faculty of Engineering, El-Minia University, El-Minia, Egypt Hot Laboratories and Waste Management Center, Atomic Energy Commission, Cairo, Egypt Chemical Engineering Department, Faculty of Engineering, El-Minia University, El-Minia, EgyptActivated carbon from an agriculture by-product (rice husk) was prepared by carbonization at 500°C (50°C/15 min) followed by activation at 850°C for 1 h. The adsorption of phenolic compounds onto this activated carbon was studied using batch adsorber methods. The experimental results showed that the prepared activated carbon removed phenolic compounds effectively from aqueous solution. Analysis of the contact time data gave an indication of the mechanism. The external mass-transfer constant, k f , involved in the adsorption process was determined using different initial adsorbate concentrations (C 0 ) and adsorbent masses (M). The following relationships were obtained: k f = 0.0023(M) −0.55 and k f = 0.0006(C 0 ) 0.17 . A macropore rate parameter for intraparticle diffusion, k p , was defined and used to correlate the experimental data via the following expression: k p = 0.183(C 0 ) 0.48 . A twin-resistance mass-transfer model based on external mass transfer and pore diffusion was applied successfully to the system under investigation. Concentration decay curves were predicted using a single modified mass-transfer coefficient, k f , and a single effective diffusion coefficient, D eff , for studies involving variable adsorbent masses and initial adsorbate concentrations.https://doi.org/10.1260/026361708786036070 |
| spellingShingle | Mamdouh M. Nassar Yehia H. Magdy Abd El Hakim Daifullah H. Kelany Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk Adsorption Science & Technology |
| title | Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk |
| title_full | Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk |
| title_fullStr | Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk |
| title_full_unstemmed | Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk |
| title_short | Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk |
| title_sort | mass transfer and adsorption kinetics of phenolic compounds onto activated carbon prepared from rice husk |
| url | https://doi.org/10.1260/026361708786036070 |
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