, Volume 24, Issue 6, pp 2559–2570 | Cite as

Treatment of chromium effluent by adsorption on chitosan activated with ionic liquids

  • Kevy Pontes Eliodorio
  • Vitor Seorra Andolfatto
  • Marco Rulevas Gomes Martins
  • Breno Pivaro de Sá
  • Erick Ryoiti Umeki
  • Andreia de Araújo Morandim-Giannetti
Original Paper


This study proposes, verifies, and refines the use of biopolymers treated with two new ionic liquids (ILs) (sec-butylammonium acetate and n-octylammonium acetate), as a platform for chromium adsorption. The ILs were synthesized, characterized, and applied to chitosan treatment. Analyzing the size distribution of microparticles of chitosan and chitosan activated with ILs (sec-butylammonium acetate and n-octylammonium acetate), we observed that a little decrease in the particle size occurred with the activation of chitosan (176 ± 0.02 μm to 167 ± 0.054 and 168.5 ± 0.05 μm, respectively), as well as changes in the X-ray diffraction FTIR_ATR spectra. Further studies were performed using the best adsorbent – chitosan treated with sec-butylammonium acetate. In this case, the chromium VI concentration in the sample was reduced by more than 99% when using chitosan treated with IL sec-butylammonium acetate. The best reaction time was determined as 1 h, which allowed a chromium adsorption of 99.1% and the adsorption kinetic data were best represented by the second-order model (k2 = 11.7258 g mg−1 min−1). The maximum adsorption capacity was obtained using the Langmuir isotherm model (20.833 mg g−1 at pH 4 during 1 h, using 1.0 g of chitosan), and the adsorption efficiency was enhanced at 25 °C by the Freundlich isotherm model, in which the constants KF and n were determined as 0.875 mg L−1 and 1.610, respectively.


Wastewater treatment Hexavalent chromium Chitosan Ionic liquids 



We are grateful to Fundação Educacional Inaciana Padre Sabóia de Medeiros (FEI) for supporting this research. We thank Dr. Nivaldo Boralle for the NMR measurements.

Supplementary material

10570_2017_1264_MOESM1_ESM.pdf (533 kb)
Supplementary material 1 (PDF 533 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Kevy Pontes Eliodorio
    • 1
  • Vitor Seorra Andolfatto
    • 1
  • Marco Rulevas Gomes Martins
    • 1
  • Breno Pivaro de Sá
    • 1
  • Erick Ryoiti Umeki
    • 1
  • Andreia de Araújo Morandim-Giannetti
    • 1
  1. 1.Department of Chemical EngineeringCentro Universitário FEISão Bernardo do CampoBrazil

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