Synthesis, characterization and Cr(VI) uptake study of polyaniline coated chitin

Rathinam Karthik; Sankaran Meenakshi

doi:10.1016/j.ijbiomac.2014.08.022

Synthesis, characterization and Cr(VI) uptake study of polyaniline coated chitin

Int J Biol Macromol. 2015 Jan:72:235-42. doi: 10.1016/j.ijbiomac.2014.08.022. Epub 2014 Aug 23.

Authors

Rathinam Karthik¹, Sankaran Meenakshi²

Affiliations

¹ Department of Chemistry, Gandhigram Rural Institute-Deemed University, Gandhigram, Dindigul, Tamil Nadu, 624 302, India.
² Department of Chemistry, Gandhigram Rural Institute-Deemed University, Gandhigram, Dindigul, Tamil Nadu, 624 302, India. Electronic address: drs_meena@rediffmail.com.

PMID: 25159882
DOI: 10.1016/j.ijbiomac.2014.08.022

Abstract

The present work describes the synthesis, characterization of polyaniline coated chitin (PCC) and its application as an adsorbent of the removal of Cr(VI) ions from aqueous solution. The synthesized PCC was characterized using FTIR, XRD, SEM-EDX, BET, TGA, and DSC. The batch adsorption system was used to optimize the various parameters for the removal of Cr(VI) ions from aqueous solution by PCC. The equilibrium data obtained at optimized conditions were well described by Freundlich isotherm model than the Langmuir isotherm model. The values of ΔG(0), ΔH(0) and ΔS(0) indicate the spontaneous and the endothermic nature of the adsorption process. The pseudo-second-order kinetic model fitted well to the kinetic data. The regeneration studies revealed that the Cr(VI) loaded PCC could be reused for three consecutive cycles.

Keywords: Adsorption; Chitin; Polyaniline.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Aniline Compounds / chemistry*
Chitin / chemistry*
Chromium / chemistry*
Kinetics
Models, Theoretical
Thermodynamics
Water Purification

Substances

Aniline Compounds
polyaniline
Chromium
Chitin
chromium hexavalent ion