Adsorption of hexavalent chromium from aqueous medium using a new Schiff base Chitosan Derivative

K. Balakrishna Prabhu, M. B. Saidutta, M. Srinivas Kini

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Modification of chitosan biopolymer was achieved by grafting (3-phenyl-1H-pyrazole-4-carbaldehyde) by the Schiff base reaction to synthesize a new chitosan derivative (ChD). The formation of the product was confirmed by FTIR, XRD and 13CNMR analysis. The grafted molecule provided additional nitrogen bearing groups as binding sites. The new derivative was used to investigate the removal of Cr (VI) ions in water. The sorption was best favoured at a pH of 3.0. From the Langmuir isotherm, the maximum monolayer adsorption capacity for the adsorbent was determined (Qo=63.5 mg/g). The sorption data fitted satisfactorily to the Redlich-Peterson isotherm. The kinetics of adsorption was best described by pseudo-second order rate equation. The thermodynamic study revealed that the adsorption of Cr (VI) on to ChD was spontaneous and accompanied by increase in entropy. The metal removal was favoured at lower temperatures indicating that the adsorption was exothermic in nature.

Original languageEnglish
Pages (from-to)4072-4082
Number of pages11
JournalInternational Journal of Applied Engineering Research
Volume12
Issue number14
Publication statusPublished - 01-01-2017

Fingerprint

Chitosan
Chromium
Derivatives
Adsorption
Isotherms
Sorption
Bearings (structural)
Biopolymers
Binding sites
Adsorbents
Monolayers
Entropy
Thermodynamics
Nitrogen
Molecules
Kinetics
Ions
Metals
Water
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Balakrishna Prabhu, K. ; Saidutta, M. B. ; Srinivas Kini, M. / Adsorption of hexavalent chromium from aqueous medium using a new Schiff base Chitosan Derivative. In: International Journal of Applied Engineering Research. 2017 ; Vol. 12, No. 14. pp. 4072-4082.
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Adsorption of hexavalent chromium from aqueous medium using a new Schiff base Chitosan Derivative. / Balakrishna Prabhu, K.; Saidutta, M. B.; Srinivas Kini, M.

In: International Journal of Applied Engineering Research, Vol. 12, No. 14, 01.01.2017, p. 4072-4082.

Research output: Contribution to journalArticle

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