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Vellore, India

Bhargavi V.L.N.,Sri Venkateswara College of Engineering | Sudha P.N.,Dkm College For Women
International Journal of ChemTech Research

The focus of the present research work is on the monitoring of heavy metal pollution in water and soils of Ranipet, Tamil nadu India. The physico-chemical characteristics and heavy metals like Chromium and Cadmium were analysed for two polluted water and soil samples collected from Bharathi nagar (I) and Tandalam (II) villages of Ranipet surroundings. The soil sample of Tandalam was chosen for the remediation studies, due to its high levels of pollution. Electrokinetic remediation of Tandalam soil was carried at 50 V. The electrokinetic cell was sectioned into four compartments and analysed for the concentrations of Chromium and Cadmium. After electrokinetic remediation, the heavy metal contaminants get concentrated in different sections according to their charges and the soil in the four compartments of the electrokinetic cell was subjected to phytoremediation with Indian mustard (Brassica juncea) seeds. The efficiency of Brassica juncea was proved in remediating the heavy metals Chromium and Cadmium from the polluted soils. © 2015, Sphinx Knowledge House. All rights reserved. Source

Saravanan D.,Tamil University | Hemalatha R.,Tamil University | Sudha P.N.,Dkm College For Women
Der Pharma Chemica

Mixing of two or more polymers to produce blends is a well established strategy for achieving specific combination of physical properties. Polymer blend films of chitin and bentonite were prepared from homogeneous solutions in trichloroacetic acid at various ratios of chitin and bentonite. The cross linking agent glutaraldehyde was incorporated into the polymer blends to improve the properties such as surface hardness, stiffness, resistance to temperature and solvent attack. FTIR study revealed that there is intermolecular molecular hydrogen bonding interaction between the two polymer components. XRD studies shows that the films to exhibit an amorphous character. Glass transition temperature and the crystallization of the polymer blends were investigated on the basis of studies differential scanning calorimetry (DSC). By TGA and DTG experiments, enhancement in the thermal stability of polymer blend in presence of cross linking agent (glutaraldehyde) was found out. Adsorption of Cu (II) and Cr (VI) on chitin was studied by the Longmuir and Freundlich method. The influence of dosage of adsorbent, contact time & pH were experimentally verified. The results revealed that the adsorption of Cu (II) and Cr (VI) on chitin is spontaneous, endothermic and favorable. This blended polymer was used as an adsorbent in dye effluent treatment. Source

Joseph J.J.,Vellore Institute of Technology | Sangeetha D.,Vellore Institute of Technology | Gomathi T.,Dkm College For Women
International Journal of Biological Macromolecules

The nano-polymeric pharmaceutical excipient such as chitosan nanoparticles (CS-NPs) were synthesized for formulating the anticancer drug Sunitinib (STB). The formulation was done through the simple ionic cross linking method. The prepared formulation was characterized by DLS, SEM, FT-IR and XRD. The DLS study reveals that the Sunitinib loaded chitosan nanoparticles (SNB-CS-NPs) were in the size range of <200. nm. Encapsulation of Sunitinib and validation for the formulation was done using UV spectrophotometry. In vitro drug release and its cytotoxic studies were performed for STB-CS-NPs. This study implies the novel drug delivery system for Sunitinib for the effective sustained delivery. © 2015 Elsevier B.V. Source

Sangeetha V.,Sathyabama University | Sudha P.N.,Dkm College For Women
International Journal of ChemTech Research

Chitosan is the most important derivative obtained from Chitin, a natural polysaccharide constitute of crustaceous shells. In this research work the polymer blends were prepared by mixing of nano chitosan with poly vinyl pyrrolidone (PVP) and silk fibroin in the ratio 1:1:1 with and without the inclusion of cross linking agent glutaraldehyde. The characterizations of prepared polymeric blends were carried out by advanced analytical tools FT-IR, TGA, DSC and XRD methods. From the FTIR study it can be revealed that there is intermolecular hydrogen bonding interaction. The XRD studies show the films of this study are of amorphous in character. By using DSC experiments the Glass Transition temperature and crystallization of the polymer blends were investigated.Further analysis of cytoxicity assay will provide information on the suitability of the material for tissue engineering applications. Keywords: Nanochitosan, PVP, Silk fibroin, characterization. Source

Hajeeth T.,Sathyabama University | Sudha P.N.,Dkm College For Women | Vijayalakshmi K.,Dkm College For Women | Gomathi T.,Dkm College For Women
International Journal of Biological Macromolecules

Graft copolymerization of acrylonitrile on to cellulosic material derived from sisal fiber can be initiated effectively with ceric ammonium nitrate. The grafting conditions were optimized by changing the concentration of initiator and monomer. The change in crystallinity of the grafted polymeric samples was concluded from the XRD patterns. The prepared cellulose grafted acrylonitrile copolymer was used as an adsorbent to remove Cr (VI) ions from aqueous solutions. The efficiency of the adsorbent was identified from the variation in the percentage of adsorption with contact time, adsorbent dose and pH. From the observed results it was evident that the adsorption of metal ions increases with the increase in contact time and metal ion concentration. An optimum pH was found to be 5.0 for the removal of Cr (VI) from the aqueous solution. The results of the Langmuir, Freundlich, and pseudo first- and second-order studies revealed that the adsorption was found to fit well with Freundlich isotherm and follows pseudo second-order kinetics. From the above results, it was concluded that the cellulose-g-acrylonitrile copolymer was found to be an efficient adsorbent for the removal of Cr (VI) from aqueous waste generated from industries. © 2014 Elsevier B.V. Source

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