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  • Know Res., 2016, 3(1),  pp 11-17  

    DOI:10.7598/kor2016.28

    Research Article

    Studies on Removal of Methylene Blue Dye from Aqueous Solution by Adsorption Using Low Cost Adsorbent

  • A. RAJATHI, V. NANDHAKUMAR, M. CHANDARMOHAN and A. ELAVARASAN
  • Department of Chemistry, A.V.V.M Sri Pushpam College, Poondi - 613 503, India
  • Abstract

    An adsorbent was prepared from Ziziphus jujube (Linn.) fruit shell by H2SO4 acid activation method and its adsorption characteristic was studied for the removal of a Methylene Blue (MB) dye from aqueous solution. Batch mode adsorption experiments were carried out. Maximum dye removal capacity was observed at a pH of 7. Equilibrium data were obtained at 303, 313 and 323 K for the initial concentrations of 12, 14 and 16 mg/L. Adsorption isotherm models such as Langmuir, Freundlich, Temkin and Dubinin?Radushkevich isotherms were used to correlate the equilibrium data. Thermodynamic parameters such as Gibb?s free energy, Enthalpy and Entropy of the adsorption process were also evaluated. Analysis of these values inferred that the adsorption was endothermic, spontaneous and proceeded with increased randomness.

    Keywords

    Methylene Blue dye, Adsorption, Ziziphus jujuba fruit shell, Langmuir, Freundlich, Temkin, Dubinin?Radushkevich isotherms, Thermodynamic parameters

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