Microwave assisted preparation of n-butylacrylate grafted chitosan and its application for Cr(VI) adsorption

Biopolymers such as chitosan possess excellent properties suited for varied applications. In this work, we describe a novel microwave assisted method for the preparation of n-butylacrylate grafted chitosan adsorbent and its utility for the adsorption of chromium(VI). A 3min irradiation time was enou...

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Bibliographic Details
Published in:International journal of biological macromolecules 2014-05, Vol.66, p.135-143
Main Authors: Santhana Krishna Kumar, A., Uday Kumar, Chinta, Rajesh, Vidya, Rajesh, N.
Format: Article
Language:English
Subjects:
Acrylates - chemistry
Adsorption
Biopolymers - chemistry
Chitosan
Chitosan - chemistry
Chromium - chemistry
Chromium(VI)
Graft polymerization
Hydrogen-Ion Concentration
Industrial Waste
Kinetics
Microwave
Microwaves
n-Butylacrylate
Solutions - chemistry
Thermodynamics
Water Pollutants, Chemical - chemistry
Water Purification - methods
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Summary:Biopolymers such as chitosan possess excellent properties suited for varied applications. In this work, we describe a novel microwave assisted method for the preparation of n-butylacrylate grafted chitosan adsorbent and its utility for the adsorption of chromium(VI). A 3min irradiation time was enough to prepare the adsorbent, and techniques such as FT-IR, powder XRD, SEM and EDS were used for comprehensive characterization. The adsorption was effective at pH 3.5 with 25mL of 20ppm Cr(VI) solution. Langmuir, Freundlich, Dubinin–Radushkevich, Temkin, Elovich and Redlich isotherms were studied in detail. The ΔG, ΔH and ΔS parameters were evaluated to understand the adsorption thermodynamics. The adsorption involves the interaction of Cr(VI) with the hydroxyl and amino groups in chitosan.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2014.02.007