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DC Field | Value | Language |
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dc.contributor.author | Guyo, Upenyu | - |
dc.contributor.author | Phiri, Lycenter Yard | - |
dc.contributor.author | Chigondo, Fidelis | - |
dc.date.accessioned | 2019-03-06T08:43:30Z | - |
dc.date.available | 2019-03-06T08:43:30Z | - |
dc.date.issued | 2017 | - |
dc.identifier.issn | 2090-9063 | - |
dc.identifier.uri | https://www.hindawi.com/journals/jchem/2017/7025073/ | - |
dc.identifier.uri | http://hdl.handle.net/11408/3459 | - |
dc.description.abstract | 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. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Hindawi Publishing Corporation | en_US |
dc.relation.ispartofseries | Journal of Chemistry;p.1-10 | - |
dc.subject | Metakaolin zeolite | en_US |
dc.subject | Hydrated aluminosilicates | en_US |
dc.subject | Zeolites | en_US |
dc.title | Application of central composite design in the Adsorption of Ca(II) on Metakaolin Zeolite | en_US |
dc.type | Article | en_US |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
Appears in Collections: | Research Papers |
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7025073.pdf | Full Text | 1.73 MB | Adobe PDF | ![]() View/Open |
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