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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 9, No. 2, 2005, pp. 29-35
Bioline Code: ja05041
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 9, No. 2, 2005, pp. 29-35

 en Adsorption of Methylene Blue from aqueous Solution on the Surface of Wool Fiber and Cotton Fiber


Adsorption of dye methylene blue from aqueous solution on the surface of sheep wool and cotton fibers was accomplished under the optimize conditions of temperature, concentration, pH, stay time duration and quantity of adsorbent. Spectrometric technique was used for the measurements of concentration of dye before and after adsorption. The percentage removal and distribution constant (KD) values for the removal of of methylene blue were also calculated. The values of % adsorption data for methylene blue - sheep wool system show better adsorption capacity as compared to methylene blue - cotton fiber system. The applicability of Langmuir and Freundlich adsorption isotherm equations for the present system was also tested. The experimental data are fitted to the Langmuir and Freundlich isotherm equations. The values of their corresponding constants were determined from the slope and intercepts of their respective plots. Thermodynamic parameters like ΔDG°, ΔDH° and ΔDS° were calculated on the basis of Langmuir constant K. The methylene blue - sheep wool system show non spontaneous and exothermic behavior, while methylene blue - cotton fiber system show spontaneous and endothermic behavior. The results of these investigations suggested that natural adsorbents can be utilized as adsorbent materials, because of their selectivities for the removal of dyes. @JASEM

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