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Vol. 30 No. 3 (2018): Vol 30 Issue 3

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Adsorption of Methyl Violet Dye onto Cresson Seeds: Thermodynamic and Kinetic Studies

https://doi.org/10.14233/ajchem.2018.21063
Huda N. Al-Ani
Department of Chemistry, College of Science, University of Baghdad, Jadiriya, Baghdad, Iraq

Corresponding Author(s) : Huda N. Al-Ani

hudanajim2005@yahoo.com

Asian Journal of Chemistry, Vol. 30 No. 3 (2018): Vol 30 Issue 3

Abstract

The adsorption of methyl violet dye onto Cresson (Lepidium sativum) seeds also known as Garden cress as an adsorbent from its aqueous solution has been carried out. The effect of experimental coefficient parameters like connection time, primary concentration of adsorbate (methyl violet) and amount of adsorbent dose and temperature were evaluated to obtain the optimum condition for adsorption of methyl violet onto Cresson seeds using batch adsorption. The adsorption information were mathematically analyzed using adsorption isotherms like Langmuir, Freundlich and Dubinin-Radushkevich isotherms in order to study adsorption mechanism of methyl violet dye onto Cresson seed. The isotherms of adsorption were advanced and equilibrium data adjusted well to Freundlich isotherm model. The kinetic studies indicated that the process of adsorption followed the model of second-order kinetic. The thermodynamic parameters (DGº, DHº and DSº) were estimated and the obtained negative value of DGº indicate a spontaneous adsorption process, positive DHº value obtained designate about the endothermic properties of adsorption process and positive DSº value obtained during the adsorption indicated the increased randomness.

Keywords

Cresson seed Methyl violet dye Adsorption kinetics
Al-Ani, H. N. (2018). Adsorption of Methyl Violet Dye onto Cresson Seeds: Thermodynamic and Kinetic Studies. Asian Journal of Chemistry, 30(3), 633–638. https://doi.org/10.14233/ajchem.2018.21063
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