Adsorption of Methylene Blue, Brilliant Green and Rhodamine B from Aqueous Solution Using Collagen-g-p(AA-co-NVP)/Fe3O4@SiO2 Nanocomposite Hydrogel

  • Mahdi Taghvay Nakhjiri
  • Gholam Bagheri MarandiEmail author
  • Mehran Kurdtabar
Original Paper


In this study, the collagen-g-poly(acrylic acid-co-N-vinylpyrrolidone)/Fe3O4@SiO2 (collagen-g-p(AA-co-NVP)/Fe3O4@SiO2) as magnetic nanocomposite hydrogel was synthesized by graft copolymerization of acrylic acid (AA) and N-vinylpyrrolidone (NVP) onto collagen in the presence of the Fe3O4@SiO2 using ammonium persulfate as a free radical initiator and bis[2-(methacryloyloxy)ethyl] phosphate as a crosslinker under ultrasound-assisted condition. The blank collagen-g-p(AA-co-NVP) hydrogel and its composite with the Fe3O4@SiO2 nanoparticles were characterized by means of FTIR, SEM-EDS, XRD, VSM and TGA methods. The effects of different parameters such as pH, dose of adsorbent and time on swelling behavior were examined. The swelling ratio of the collagen-g-p(AA-co-NVP) hydrogel increased in the presence of the Fe3O4@SiO2 nanoparticles. Adsorption behavior of magnetic nanocomposite hydrogel was investigated for the adsorption of dyes and it was found to remove about 93% for methylene blue, 96% for brilliant green and 89% for rhodamine B in 50 mg/L of dyes solutions at pH 7. Kinetic study revealed the applicability of pseudo-first-order and pseudo-second-order models for the adsorption of mentioned dyes. The adsorption isotherm was studied in 25, 35, 45 and 55 °C using Langmuir, Freundlich, Temkin and Sips models and the adsorption data were well described by Langmuir isotherm model. Negative values of ΔGº for all three dyes suggested the feasibility of dyes removal and support for spontaneous adsorption of mentioned dyes on magnetic nanocomposite hydrogel. Desorption of dyes from the dye loaded nanocomposite hydrogel was simply done in ethanol. The results indicate that the prepared magnetic nanocomposite hydrogel is an efficient adsorbent with high adsorption capacity for the aforementioned dyes.


Magnetic nanocomposite hydrogel Ultrasound-assisted Dye adsorption Brilliant green Kinetic Isotherm 



The authors sincerely appreciate the instrumental supports received from the Islamic Azad University-Karaj branch.

Supplementary material

10924_2019_1372_MOESM1_ESM.docx (9.5 mb)
Supplementary material 1 (DOCX 9698 KB)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Chemistry, Karaj BranchIslamic Azad UniversityKarajIran

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