Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral
The efficiency of dolomite to remove phosphate from aqueous solutions was investigated. The experimental results showed that the removal of phosphate by dolomite was rapid (the removal rate over 95% in 60 min) when the initial phosphate concentration is at the range of 10–50 mg/L. Several kinetic mo...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/853105 |
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| author | Xiaoli Yuan Wentang Xia Juan An Jianguo Yin Xuejiao Zhou Wenqiang Yang |
| author_facet | Xiaoli Yuan Wentang Xia Juan An Jianguo Yin Xuejiao Zhou Wenqiang Yang |
| author_sort | Xiaoli Yuan |
| collection | DOAJ |
| description | The efficiency of dolomite to remove phosphate from aqueous solutions was investigated. The experimental results showed that the removal of phosphate by dolomite was rapid (the removal rate over 95% in 60 min) when the initial phosphate concentration is at the range of 10–50 mg/L. Several kinetic models including intraparticle diffusion model, pseudo-first-order model, Elovich model, and pseudo-second-order model were employed to evaluate the kinetics data of phosphate adsorption onto dolomite and pseudo-second-order model was recommended to describe the adsorption kinetics characteristics. Further analysis of the adsorption kinetics indicated that the phosphate removal process was mainly controlled by chemical bonding or chemisorption. Moreover, both Freundlich and Langmuir adsorption isotherms were used to evaluate the experimental data. The results indicated that Langmuir isotherm was more suitable to describe the adsorption characteristics of dolomite. Maximum adsorption capacity of phosphate by dolomite was found to be 4.76 mg phosphorous/g dolomite. Thermodynamic studies showed that phosphate adsorption was exothermic. The study implies that dolomite is an excellent low cost material for phosphate removal in wastewater treatment process. |
| format | Article |
| id | doaj-art-14f42f6da06a4ad08dd1bbaef9b51fca |
| institution | OA Journals |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-14f42f6da06a4ad08dd1bbaef9b51fca2025-08-20T02:02:01ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/853105853105Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite MineralXiaoli Yuan0Wentang Xia1Juan An2Jianguo Yin3Xuejiao Zhou4Wenqiang Yang5School of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaSchool of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaSchool of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaSchool of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaSchool of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaSchool of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaThe efficiency of dolomite to remove phosphate from aqueous solutions was investigated. The experimental results showed that the removal of phosphate by dolomite was rapid (the removal rate over 95% in 60 min) when the initial phosphate concentration is at the range of 10–50 mg/L. Several kinetic models including intraparticle diffusion model, pseudo-first-order model, Elovich model, and pseudo-second-order model were employed to evaluate the kinetics data of phosphate adsorption onto dolomite and pseudo-second-order model was recommended to describe the adsorption kinetics characteristics. Further analysis of the adsorption kinetics indicated that the phosphate removal process was mainly controlled by chemical bonding or chemisorption. Moreover, both Freundlich and Langmuir adsorption isotherms were used to evaluate the experimental data. The results indicated that Langmuir isotherm was more suitable to describe the adsorption characteristics of dolomite. Maximum adsorption capacity of phosphate by dolomite was found to be 4.76 mg phosphorous/g dolomite. Thermodynamic studies showed that phosphate adsorption was exothermic. The study implies that dolomite is an excellent low cost material for phosphate removal in wastewater treatment process.http://dx.doi.org/10.1155/2015/853105 |
| spellingShingle | Xiaoli Yuan Wentang Xia Juan An Jianguo Yin Xuejiao Zhou Wenqiang Yang Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral Journal of Chemistry |
| title | Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral |
| title_full | Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral |
| title_fullStr | Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral |
| title_full_unstemmed | Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral |
| title_short | Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral |
| title_sort | kinetic and thermodynamic studies on the phosphate adsorption removal by dolomite mineral |
| url | http://dx.doi.org/10.1155/2015/853105 |
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