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Determination of Isotherm Parameters for the Adsorption of Rhodamine B Dye Onto Activated Carbon Prepared from Ziziphus jujuba Seeds


Affiliations
1 Department of Chemistry, M.R.G College, Mannargudi – 614 001, India
2 Department of Chemistry, Government Arts college, Thuvakudi Malai, Tiruchirappalli - 620 022, India
     

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The adsorption of Rhodamine B dye from aqueous solution onto activated carbon prepared from Ziziphus jujuba seed by zinc chloride activation (ZAC) was studied in a batch system with respect to contact time, pH, and temperature. Solution pH 4 was favorable for the adsorption of this dye. Equilibrium isotherms were analysed by Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherms. The adsorption capacity was found to be 142.9 mg/g by Langmuir isotherm. The Temkin and Dubiniin - Raduskevich isotherm constants suggested that physisorption might be the major mode of the adsorption process. Thermodynamic parameters like ΔG°, ΔH° and ΔS° were calculated. These values inferred the spontaneous adsorption with increased randomness at the solid-liquid interface and endothermic behavior.

Keywords

Adsorption, Rhodamine B Dye, Ziziphus jujuba Seed Carbon, Isotherms, pH Effect.
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  • Determination of Isotherm Parameters for the Adsorption of Rhodamine B Dye Onto Activated Carbon Prepared from Ziziphus jujuba Seeds

Abstract Views: 70  |  PDF Views: 6

Authors

A. Sivarajan
Department of Chemistry, M.R.G College, Mannargudi – 614 001, India
V. Shanmugapriya
Department of Chemistry, Government Arts college, Thuvakudi Malai, Tiruchirappalli - 620 022, India

Abstract


The adsorption of Rhodamine B dye from aqueous solution onto activated carbon prepared from Ziziphus jujuba seed by zinc chloride activation (ZAC) was studied in a batch system with respect to contact time, pH, and temperature. Solution pH 4 was favorable for the adsorption of this dye. Equilibrium isotherms were analysed by Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherms. The adsorption capacity was found to be 142.9 mg/g by Langmuir isotherm. The Temkin and Dubiniin - Raduskevich isotherm constants suggested that physisorption might be the major mode of the adsorption process. Thermodynamic parameters like ΔG°, ΔH° and ΔS° were calculated. These values inferred the spontaneous adsorption with increased randomness at the solid-liquid interface and endothermic behavior.

Keywords


Adsorption, Rhodamine B Dye, Ziziphus jujuba Seed Carbon, Isotherms, pH Effect.