Application of polyaniline/bacterial extracellular polysaccharide nanocomposite for removal and detoxification of Cr(VI) |
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| Authors: | V. Janaki Mi-Na Shin Song-Hee Kim Kui-Jae Lee Min Cho A. K. Ramasamy Byung-Taek Oh Seralathan Kamala-Kannan |
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| Affiliation: | 1. Department of Chemistry, Periyar University, Salem, 636011, Tamil Nadu, India
2. Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 570752, South Korea
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| Abstract: | Polyaniline/bacterial extracellular polysaccharide (Pn/EPS) nanocomposite was prepared by in situ polymerization of aniline using ammonium peroxydisulfate as oxidant. Transmission electron micrograph showed that the surface of the nanocomposite was rough, providing good possibility for adsorption of Cr(VI). Under optimized conditions, the nanocomposite removed 97.3 % (25 mg L?1) of Cr(VI) from aqueous solution. The Freundlich isotherm model and pseudo-first order rate expression better described the adsorption equilibrium of Pn/EPS nanocomposite. X-ray diffractogram peak for Cr2O3 (2θ = 24.5) in the nanocomposite confirmed the reduction of Cr(VI). Fourier transform infrared spectroscopy pattern of the nanocomposite confirmed the ionic interaction between Cr species and surface functional groups. The results of the study indicate that Pn/EPS nanocomposite could be used for the removal and detoxification of Cr(VI) from aqueous solution. |
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