Seminar Details

Seminar Title
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Polymeric Nanocomposite Materials for the Removal of Hexavalent Chromium
Seminar Type
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Synopsis Seminar
Department
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Chemistry
Speaker Type
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Student
Speaker Name
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SUMANTA SAHU ( RollNo : 516CY1001)
Date  &  Time
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11 Jun 2021  10.30 am
Venue
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M S Team (Code 4cng2zy)
Contact
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Prof. Raj Kishore Patel
Abstract
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Chromium is a highly toxic environmental contaminant to which millions of people are exposed all over the world. The element is ubiquitous in water and almost all living entities are exposed to it. Chronic uptake of chromium contaminated water and food may result in serious health effects including cancer, bronchial asthma, pulmonary congestions, kidney damage, diarrhea, stomach cancer and hepatotoxicity in human beings. In this work, polymeric nanocomposite materials are used as efficient adsorbents for removal of hexavalent chromium from aqueous solutions. These polymeric materials have advantages like high surface area, large number of active sites, high ion exchange properties and high thermal stability. These materials have been found as potential materials for separation, gas sensing, and drug delivery. Keeping all this in our mind, the overall objectives of the present work is to design polymeric nanocomposite materials via different synthetic routes. The morphological and structural information of the synthesized materials are analyzed by various techniques such as FTIR, FESEM, XRD, TEM, XPS, TGA, Raman, Zeta and BET. Finally, the composite was tested as a potential adsorbent material. The effect of various parameters like adsorbent dose, pH, initial concentration, contact time, stirring speed, temperature, ionic strength, effect of competitive ions etc. are investigated to determine the adsorption efficiency of the materials. Besides, investigations are done to know insight into the adsorption mechanism. Finally, the adsorption isotherms, kinetics and thermodynamic parameters were evaluated based on the batch experimental data. The reusability studies of the materials are checked through several adsorptions-desorption cycles to use it as a potential adsorbent for environmental remediation. The objective one describes the detailed study of core-shell thorium oxide polyaniline nanocomposite for Cr(VI) removal. The second objective narrates about the analysis of lanthanum phosphate polyaniline nanocomposite for selective removal of Cr(VI). The objective three delineates regarding the detailed study to remove Cr(VI) by polypyrrole modified layered double hydroxides. The objective four explains the Cr(VI) removal by flower like cerium phosphate polypyrrole nanocomposite via simultaneous adsorption-reduction mechanism.