Removal of Dye (Blue 56) From Aqueous Solution via Adsorption onto Pistachio Shell: kinetic and isotherm study of removal process

Authors

Department of Chemistry, Gachsaran Branch, Islamic Azad University, P.O. 75818-63875 Gachsaran, Iran.

Abstract

In the present investigation, shells of pistachio are used as adsorbents and they have been successfully used for the removal of Blue 56, from water samples. The effect of various parameters such as: pH, amounts of adsorbents, size of adsorbent particles and contact time on removal processing were investigated. Inthisstudy Freundlichabsorptionisotherms and Langmuir were investigated. The experimental data were correlated reasonably well by the Freundlich adsorption isotherm and isotherm parameters were calculated. In order to investigate the efficiency of Blue 56 adsorption on the pistachio shell, pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion kinetic models were studied. Themodel that hadgoodcorrelationtoattractFreundlichwas chosenasthemodel. Its kineticsfollowsthepseudosecond order reaction.

Keywords

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History

  • Receive Date: 10 March 2012
  • Revise Date: 22 April 2021
  • Accept Date: 29 October 2018

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