Adsorption of dye-extract from peristophe roxburghiana onto cotton fabric: Kinetic, thermodynamic and isothermic evaluation
Date
2023-03
Authors
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Publisher
Federal University of Technology, Owerri
Abstract
Adsorption of dye-extract from Peristophe roxburghiana onto cotton fabric: Kinetic, thermodynamics and Isothermic evaluation was studied at different temperatures (50°C, 60°C, and 70°C) and concentration (2, 2.5, 3, 3.5, 4, 4.5, 5g/l). Peristophe roxburghiana (PR) plant leaf sample was extracted using aqueous extraction method for 40mins at 70°C. The plant extract was characterized using UV-VIS spectrophotometer and FTIR. The wavelength of maximum
adsorption was at 580nm and the functional group identified at 1200.2 cm-1 , 1.323.3 cm- , and 3272.6 cm-1 in the plant extract showed that the dye is an Anthocyanin dye as it contains hydroxyl (OH+ ), ketone (CO- ), hydroxylated aromatic ring. The adsorption mechanism was affected by temperature and concentration while its kinetic pattern obeyed pseudo second order model and type 1 Langmuir isotherm model perfectly. Thermodynamic parameters values 3438.4J/Mol for (ΔH°) and -9.991 J/Mol/K(ΔS°) respectively revealed the reaction was endothermic in nature. This study also showed that the reaction of the dye is chemisorption with a definable adsorption mechanism. In conclusion, a design for colour control and colour optimization can be achieved with proper understands of the adsorption behavior of the dye extract from this plant leaf.
Description
This thesis is for the award of Master of Science (MSc) in Textile Science and Engineering
Keywords
Adsorption, peristophe roxburghiana, cotton, kinetic, thermodynamic, isothermic, evaluation, Department of Polymer and Textile Engineering
Citation
Oguzie, C. K. (2023). Adsorption of dye-extract from peristophe roxburghiana onto cotton fabric: Kinetic, thermodynamic and isothermic evaluation (Unpublished Master's Thesis). Federal University of Technology, Owerri, Nigeria