Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite
Expanded graphite (EG) is a kind of important adsorbent for organic compound such as oil and dyes. We have investigated the adsorption kinetics characteristics of this adsorbent for dye. EG was prepared with 50 mesh crude graphite through chemical oxidation intercalation of potassium permanganate an...
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2008/786025 |
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| _version_ | 1832554396911665152 |
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| author | Xiu-yan Pang Fei Gong |
| author_facet | Xiu-yan Pang Fei Gong |
| author_sort | Xiu-yan Pang |
| collection | DOAJ |
| description | Expanded graphite (EG) is a kind of important adsorbent for organic compound such as oil and dyes. We have investigated the adsorption kinetics characteristics of this adsorbent for dye. EG was prepared with 50 mesh crude graphite through chemical oxidation intercalation of potassium permanganate and vitriol, and dye of acid red 3B was used as model sorbate. We have studied the adsorption kinetic models and rate-limiting step of the process. Adsorption rate and activation energy of the adsorption process were calculated. Kinetic studies show that the kinetic data are well described by the pseudo second-order kinetic model. The equilibrium adsorbance increases with the increase of the initial acid red 3B concentration. Initial adsorption rate increases with the increase of the initial dye concentration and temperature. Adsorption process of acid red 3B on EG has small activation energy. Internal diffusion appears to be the rate-limiting step for the adsorption process. |
| format | Article |
| id | doaj-art-e9c32da89b494a38b03cf68b379976de |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-e9c32da89b494a38b03cf68b379976de2025-02-03T05:51:43ZengWileyE-Journal of Chemistry0973-49452090-98102008-01-015480280910.1155/2008/786025Study on the Adsorption Kinetics of Acid Red 3B on Expanded GraphiteXiu-yan Pang0Fei Gong1College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, ChinaCollege of Chemistry and Environmental Science, Hebei University, Baoding, 071002, ChinaExpanded graphite (EG) is a kind of important adsorbent for organic compound such as oil and dyes. We have investigated the adsorption kinetics characteristics of this adsorbent for dye. EG was prepared with 50 mesh crude graphite through chemical oxidation intercalation of potassium permanganate and vitriol, and dye of acid red 3B was used as model sorbate. We have studied the adsorption kinetic models and rate-limiting step of the process. Adsorption rate and activation energy of the adsorption process were calculated. Kinetic studies show that the kinetic data are well described by the pseudo second-order kinetic model. The equilibrium adsorbance increases with the increase of the initial acid red 3B concentration. Initial adsorption rate increases with the increase of the initial dye concentration and temperature. Adsorption process of acid red 3B on EG has small activation energy. Internal diffusion appears to be the rate-limiting step for the adsorption process.http://dx.doi.org/10.1155/2008/786025 |
| spellingShingle | Xiu-yan Pang Fei Gong Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite E-Journal of Chemistry |
| title | Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite |
| title_full | Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite |
| title_fullStr | Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite |
| title_full_unstemmed | Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite |
| title_short | Study on the Adsorption Kinetics of Acid Red 3B on Expanded Graphite |
| title_sort | study on the adsorption kinetics of acid red 3b on expanded graphite |
| url | http://dx.doi.org/10.1155/2008/786025 |
| work_keys_str_mv | AT xiuyanpang studyontheadsorptionkineticsofacidred3bonexpandedgraphite AT feigong studyontheadsorptionkineticsofacidred3bonexpandedgraphite |