Adsorption and removal of chromium (VI) contained in aqueous solutions using a chitosan-based hydrogel

  • Pâmela Becalli Vilela
  • Amanda Dalalibera
  • Eduardo Costa Duminelli
  • Valter Antonio Becegato
  • Alexandre Tadeu PaulinoEmail author
Alternative Adsorbent Materials for Application in Processes Industrial


The aim of this work was to study the adsorption and removal of chromium (VI) ions contained in aqueous solutions using a chitosan-based hydrogel synthesized via chemical crosslinking of radical chitosan, polyacrylic acid, and N,N′-methylenebisacrylamide. Fourier-transform infrared spectroscopy confirmed the hydrogel synthesis and presence of reactive functional groups for the adsorption of chromium (VI) ions. The chromium (VI) adsorption mechanism was evaluated using non-linear Langmuir, Freundlich, Redlich-Peterson, and Sips isotherms, with the best fit found by the non-linear Redlich-Peterson isotherm. The maximum chromium (VI) adsorption capacities of the chitosan-based hydrogel were 73.14 and 93.03 mg metal per g dried hydrogel, according to the non-linear Langmuir and Sips isotherm models, respectively. The best kinetic fit was found with the pseudo-nth order kinetic model. The chromium (VI) removal percentage at pH 4.5 and 100 mg L−1 initial metal concentration was 94.72%. The results obtained in this contribution can be useful for future works involving scale-up of a water and wastewater treatment method from a pilot plant to full-scale plant.


Chromium (VI) Removal Hydrogel Chitosan Adsorption isotherms Kinetic models 



ATP and PBV thank the Brazilian fostering agency CAPES for the master scholarship.

Funding information

Brazilian fostering agency CNPq (Grant N° 312356/2015-3) for provided financial support.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018
corrected publication 2018

Authors and Affiliations

  1. 1.Postgraduate Program in Environmental ScienceSanta Catarina State UniversityLagesBrazil
  2. 2.Department of Environmental and Sanitary EngineeringSanta Catarina State UniversityLagesBrazil
  3. 3.Department of Food and Chemical EngineeringSanta Catarina State UniversityPinhalzinhoBrazil

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