Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite
Metakaolin zeolite-A was synthesized from thermally activated kaolin clay and characterized by Fourier Transform Infrared Spectroscopy and X-Ray Diffraction Spectroscopy. The effects of pH (2–10), contact time (10–180 min), initial concentration (5–120 mgL−1), and dosage (0.1–2 g) and their interact...
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Hindawi Publishing Corporation
2019
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| Online Access: | https://www.hindawi.com/journals/jchem/2017/7025073/ http://hdl.handle.net/11408/3459 |
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| author | Guyo, Upenyu Phiri, Lycenter Yard Chigondo, Fidelis |
| author_facet | Guyo, Upenyu Phiri, Lycenter Yard Chigondo, Fidelis |
| author_sort | Guyo, Upenyu |
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| description | Metakaolin zeolite-A was synthesized from thermally activated kaolin clay and characterized by Fourier Transform Infrared Spectroscopy and X-Ray Diffraction Spectroscopy. The effects of pH (2–10), contact time (10–180 min), initial concentration (5–120 mgL−1), and dosage (0.1–2 g) and their interactions were investigated using response surface methodology following a central composite design. Optimum removal (87.70%) was obtained at pH 6, contact time 180 min, initial concentration 40.0 mgL−1, and adsorbent dosage 1.0 g by Excel Solver using the GRG solving method. The adsorption data fitted best to the Langmuir model with correlation coefficient 𝑅2 = 0.993 and Chi-square value 𝜒2 = 4.76. The Freundlich isotherm gave a correlation coefficient 𝑅2 = 0.933 and 𝜒2 = 37.91. The adsorption process followed the pseudo-second-order model. The calculated thermodynamic parameters showed that the adsorption process was endothermic and not thermodynamically spontaneous. The studied zeolite-A can therefore be used as a promising adsorbent for the removal of Ca(II) ions from aqueous solutions. |
| format | Article |
| id | ir-11408-3459 |
| institution | My University |
| language | English |
| publishDate | 2019 |
| publisher | Hindawi Publishing Corporation |
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| spelling | ir-11408-34592022-06-27T13:49:06Z Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite Guyo, Upenyu Phiri, Lycenter Yard Chigondo, Fidelis Metakaolin zeolite Hydrated aluminosilicates Zeolites Metakaolin zeolite-A was synthesized from thermally activated kaolin clay and characterized by Fourier Transform Infrared Spectroscopy and X-Ray Diffraction Spectroscopy. The effects of pH (2–10), contact time (10–180 min), initial concentration (5–120 mgL−1), and dosage (0.1–2 g) and their interactions were investigated using response surface methodology following a central composite design. Optimum removal (87.70%) was obtained at pH 6, contact time 180 min, initial concentration 40.0 mgL−1, and adsorbent dosage 1.0 g by Excel Solver using the GRG solving method. The adsorption data fitted best to the Langmuir model with correlation coefficient 𝑅2 = 0.993 and Chi-square value 𝜒2 = 4.76. The Freundlich isotherm gave a correlation coefficient 𝑅2 = 0.933 and 𝜒2 = 37.91. The adsorption process followed the pseudo-second-order model. The calculated thermodynamic parameters showed that the adsorption process was endothermic and not thermodynamically spontaneous. The studied zeolite-A can therefore be used as a promising adsorbent for the removal of Ca(II) ions from aqueous solutions. 2019-03-06T08:43:30Z 2019-03-06T08:43:30Z 2017 Article 2090-9063 https://www.hindawi.com/journals/jchem/2017/7025073/ http://hdl.handle.net/11408/3459 en Journal of Chemistry;p.1-10 open Hindawi Publishing Corporation |
| spellingShingle | Metakaolin zeolite Hydrated aluminosilicates Zeolites Guyo, Upenyu Phiri, Lycenter Yard Chigondo, Fidelis Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title_full | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title_fullStr | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title_full_unstemmed | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title_short | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite |
| title_sort | application of central composite design in the adsorption of ca(ii) on metakaolin zeolite |
| topic | Metakaolin zeolite Hydrated aluminosilicates Zeolites |
| url | https://www.hindawi.com/journals/jchem/2017/7025073/ http://hdl.handle.net/11408/3459 |
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