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Thermo-Kinetics Studies of Dye Removal with Kaolin from Tectona grandis and Indigo Dye Effluents.
Author(s):
1. Abayomi Olagundoye Adetuyi: Department of Industrial Chemistry, Federal University of Technology, P.M.B 704, Akure, Ondo State, Nigeria
2. Abdul-Akeem Alaba Mojibola: Department of Industrial Chemistry, Federal University of Technology, P.M.B 704, Akure, Ondo State, Nigeria
3. Jamiu Mosebolatan Jabar: Department of Industrial Chemistry, Federal University of Technology, P.M.B 704, Akure, Ondo State, Nigeria
Abstract:
The kinetics and thermodynamic behaviour of dye molecules removed from Tectona  grandis  and indigo dye effluents using kaolin as the coagulant were studied and the results obtained were compared with the commercial alum (as standard). Comparison of data obtained from Langmuir and Freundlich isotherms indicated that the coagulation process was chemisorptions. The isotherm parameters of Langmuir isotherm such as coagulation capacity Qo; coagulation energy intensity b; and correlation coefficient R2, in this study were greater than that of Freundlich. The correlation coefficient of the pseudo-second-order kinetics was almost equal to unity and the values of qe(Cal.) were of insignificant difference from the corresponding qe(exp.) and these made the pseudo-second-order kinetics fitted well with the coagulation process. The thermodynamic parameters (DH and DS) obtained indicated that the coagulation process was endothermic and spontaneous, respectively. The negative values of DG shows the irreversible nature of the coagulation process and the correlation coefficients (R2) closed to unity indicates the fitness of the coagulation thermodynamics with the experimental data.
Page(s): 93-99
DOI: DOI not available
Published: Journal: Pakistan Journal of Scientific and Industrial Research (Series A: Physical Sciences), Volume: 56, Issue: 2, Year: 2013
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