Biosorption of Cr(VI) Ions onto Walnut Flowers: Application of Isotherm Models
نویسندگان
1 Unité de Développement des Equipements Solaires, UDES, Centre de Développement des Energies Renouvelables, CDER, Tipaza, ALGERIE
2 Centre de Développement des Energies Renouvelables, CDER, Bouzaréah, Algiers, ALGERIE
3 Laboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry (USTHB), Algiers, ALGERIE
4 Laboratory of Electrochemistry-Corrosion, Metallurgy and Inorganic Chemistry, Faculty of Chemistry (USTHB), Algiers, ALGERIE
doi
10.30492/ijcce.2022.539486.4943چکیده
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.
