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Journal of Polymer Research

, 19:9947 | Cite as

Effect of sodium montmorillonite nanoclay on the water absorbency and cationic dye removal of carrageenan-based nanocomposite superabsorbents

  • Gholam Reza MahdaviniaEmail author
  • Bakhshali Massoumi
  • Karim Jalili
  • Gholamreza Kiani
Original Paper

Abstract

Nanocomposite superabsorbents were synthesized by simultaneously solution copolymerization of acrylamide (AAm) and sodium acrylate (Na-AA) in the presence of carrageenan biopolymer and sodium montmorillonite (Na-MMt) nanoclay. Potassium persulfate (KPS) and methylenebisacrylamide (MBA) were used as initiator and crosslinker, respectively. The structure and morphology of the nanocomposites were investigated using XRD, FTIR, scanning electron microscopy (SEM), and TEM techniques. The influence of nanoclay and carrageenan contents as well as monomer weight ratios on the degree of swelling of nanocomposites was studied. The optimum water absorbency was obtained at 10 wt% of clay, 10 wt% of carrageenan, and 1:1 of monomers weight ratio. The obtained nanocomposites were examined to remove of crystal violet (CV) cationic dye from water. The effect of carrageenan and clay content on the speed of dye adsorption revealed that while the rate of dye adsorption is enhanced by increasing the clay content up to 14 wt% of clay, it was decreased as the carrageenan increased in nanocomposite composition. The results showed that the pseudo-second-order adsorption kinetic was predominated for the adsorption of CV onto nanocomposites. The experimental equilibrated adsorption capacity of nanocomposites was analyzed using Freundlich and Langmuir isotherm models. The results corroborated that the experimental data fit the Freundlich isotherm the best.

Keywords

Superabsorbent Nanocomposites Carrageenan Removal Cationic dye 

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Gholam Reza Mahdavinia
    • 1
    Email author
  • Bakhshali Massoumi
    • 2
  • Karim Jalili
    • 2
  • Gholamreza Kiani
    • 3
  1. 1.Department of Chemistry, Faculty of ScienceUniversity of MaraghehMaraghehIran
  2. 2.Department of Chemistry, Faculty of SciencePayame Noor UniversityTehranIran
  3. 3.School of Engineering-Emerging TechnologiesTabriz UniversityTabrizIran

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