Fabrication and characterization of chitosan-crosslinked-poly(alginic acid) nanohydrogel for adsorptive removal of Cr(VI) metal ion from aqueous medium

Gaurav Sharma, Mu Naushad, Ala'a H. Al-Muhtaseb, Amit Kumar, Mohammad Rizwan Khan, Susheel Kalia, Shweta, Manju Bala, Arush Sharma

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127 Citations (Scopus)


In this study, chitosan-crosslinked-poly (alginic acid) nanohydrogel (CN-cl-PL(AA)NHG) was synthesized by co-polymerization method. It was used an effective adsorbent for the exclusion of Cr(VI) metal ion from aqueous medium. The synthesized nanohydrogel was characterized by FTIR, SEM and TEM. The TEM images clearly indicated the appearance of smooth surface with average size of particles ranging from 30 to 80 nm. The effect of different adsorption parameters like agitation time, temperature, initial metal ion concentration and adsorbent dosage was studied and optimized. The results demonstrated that the prepared chitosan-crosslinked-poly (alginic acid) nanohydrogel had high adsorption tendency for the removal of Cr(VI) from the aqueous solution. The pseudo-second-order equation represented the better adsorption kinetics for the adsorption process. The thermodynamic studies showed the adsorption of Cr(VI) onto CN-cl-PL(AA)NHG was spontaneous and chemical in nature.

Original languageEnglish
Pages (from-to)484-493
Number of pages10
JournalInternational Journal of Biological Macromolecules
Publication statusPublished - Feb 1 2017



  • Adsorption
  • Alginic acid
  • Chitosan
  • Cr(VI)
  • Kinetics
  • Nanohydrogel

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology

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