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ASIAN JOURNAL OF RESEARCH IN CHEMISTRY
Year : 2017, Volume : 10, Issue : 3
First page : ( 362) Last page : ( 368)
Print ISSN : 0974-4169. Online ISSN : 0974-4150.
Article DOI : 10.5958/0974-4150.2017.00062.1

Determination of isotherm parameters for the adsorption of Rhodamine B dye onto activated carbon prepared from Ziziphus jujuba seeds

Sivarajan A.1, Shanmugapriya V.2,*

1Department of Chemistry, M.R.G. College, Mannargudi-614 001.

2Department of Chemistry, Government Arts College, Thuvakudi Malai, Tiruchirappalli-620 022.

*Corresponding Author E-mail: vnchem14@gmail.com

Online published on 22 September, 2017.

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.

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Keywords

Adsorption, Rhodamine B dye, Ziziphus jujuba seed carbon, Isotherms, pH effect.

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