Synthesis of Iron Nanocomposite Hydrogel and Use it to Removal of Cationic Dyes from Aqueous Solutions

Document Type : Research Paper

Authors

1 Professor, Department of Chemistry, Payame Noor University.

2 M.A, Department of Chemistry, Payame Noor University

Abstract

In this study, for the first time, the synthesis of iron nanocomposite hydrogel based on poly (acrylic acid) grafted onto salep, as a biocompatible polymer, is reported. Acrylic acid monomers were grafted onto the salep backbone via initiation by APS, and at the same time, the crosslinking were occurred by using MBA. Factors affecting the water swelling during the hydrogel synthesis (monomer concentration, MBA concentration, APS concentration) were systematically optimized.The adsorption characteristics of the iron nanocomposite hydrogel adsorbent were examined using methyl violet (MV) dye. The sorption valence of the adsorbent, and the effect of the adsorbent dose, solution pH, contact time, temperature and dye concentration on the removal efficiency of MV dye were investigated. Langmuir model and Freundlich model were used to study the adsorption isotherms. The assessment revealed that the Freundlich model acceded better proportion to the experimental data than the Langmuir model. Adsorption data were modeled using the Pseudo First Order, Pseudo Second Order and Elovich kinetics equations and the kinetic data define that the adsorption procedure of MV dye is well-matched with the Pseudo Second Order model. Also, the thermodynamic parameters computed from the temperature-dependent isotherms indicated that the adsorption was a spontaneous and endothermic process. The iron nanocomposite hydrogel proved to be an efficient adsorbent and could be used for separation purposes from aqueous solutions.

Keywords

References

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History

  • Receive Date: 12 May 2017
  • Accept Date: 05 July 2017

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