Title of article
Biosorption of Cr(VI) Ions onto Walnut Flowers: Application of Isotherm Models
Author/Authors
Madjene ، Farid Unité de Développement des Equipements Solaires(UDES) - Centre de Développement des Energies Renouvelables(CDER) , Danane ، Fetta Centre de Développement des Energies Renouvelables(CDER) , Chergui ، Ahmed Laboratory of Electrochemistry-Corrosion, Metallurgy and Inorganic Chemistry - Faculty of Chemistry (USTHB) , Trari ، Mohamed Laboratory of Storage and Valorization of Renewable Energies - Faculty of Chemistry (USTHB)
From page
4039
To page
4047
Abstract
Biosorption of Cr(VI) ions onto Walnut Flowers (WF) is studied in a batch system in relation to the physical parameters. The efficiency approaches 100% with 5 g WF/L at pH~1.5 for a Cr(VI) concentration of 100 mg/L in less than 1 h. The experimental data are analyzed using two-parameter models (Langmuir, Freundlich, and Temkin), and three-parameter models (Redlich–Peterson, Sips, and Toth). In order to determine the best isotherm, two error analysis methods are used to evaluate the correlation coefficient and chi-square test. The error analysis demonstrates that the three-parameter models better describe the Cr(VI) biosorption data. The Sips equation provides the best fitting. The possible interaction between the Cr(VI) and the biosorbent surface was evaluated by FT-IR analyses. Overall, the proposed biosorbent material was successfully used for the removal of a Cr(VI) from contaminated solutions.
Keywords
Biosorption , Cr(VI) , Isotherm , Models , Walnut flower
Journal title
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Journal title
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Record number
2753683
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