Loyola Institute of Frontier Energy LIFE Loyola College

Chennai, India

Loyola Institute of Frontier Energy LIFE Loyola College

Chennai, India
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Valliammai S.,Loyola Institute of Frontier Energy LIFE Loyola College | Subbareddy Y.,Loyola Institute of Frontier Energy LIFE Loyola College | Nagaraja K.S.,Loyola Institute of Frontier Energy LIFE Loyola College | Jeyaraj B.,Loyola Institute of Frontier Energy LIFE Loyola College
Indian Journal of Chemical Technology | Year: 2017

The adsorption capacity of the activated carbons of the agricultural waste materials of Vigna mungo L (Black gram husk -ACBGH) and Paspalum scrobiculatum (Varagu millet Husk - ACVMH) have been explored for the removal of Methylene Blue (MB) from water and was proved to be an efficient adsorbent. The morphology and chemical structure of the adsorbents have been investigated by using Fourier Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Brunauer Emmett Teller (BET). Adsorption studies are conducted on a batch process, to study the effects of contact time, initial concentration, temperature and pH. Equilibrium data has been analysed using Langmuir, Freundlich and Dubinin-Radushkevich isotherm models and the monolayer adsorption capacity of the adsorbents are calculated. Kinetic data has been studied using pseudo-first and pseudo-second order kinetic models. The data fits well with the Langmuir model, with a maximum adsorption capacity of 198.40 mg g-1 and 166.30 mg g-1 for ACBGH and ACVMH respectively. The pseudo-second-order kinetics is found to be the best for the adsorption of MB by the adsorbents with good correlation. Thermodynamic studies show that the adsorption is spontaneous, endothermic and entropy controlled. The desorption studies suggest that chemisorptions may be the major mode of adsorption. © 2017, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.


Chandrakala C.,Loyola Institute of Frontier Energy LIFE Loyola College | Sravanthi P.,Loyola Institute of Frontier Energy LIFE Loyola College | Nagaraja K.S.,Loyola Institute of Frontier Energy LIFE Loyola College | Jeyaraj B.,Loyola Institute of Frontier Energy LIFE Loyola College
International Journal of ChemTech Research | Year: 2014

Al(acac)3, Cr(acac)3 and Fe(acac)3 (acac = acetylacetonate) were prepared and found to be volatile by thermal analysis that can be used for the metal oxide deposition on silica substrate by Thermal Chemical Vapour Deposition (TCVD). The aim is to deposit eutectic bimetallic and tri-metallic oxides by TCVD method. Different mole ratios of the above mentioned metal complexes were found to reduce the melting points from which binary and ternary phase diagrams of Al(acac)3-Cr(acac), Cr(acac)3-Fe(acac)3, Al(acac)3- Fe(acac)3 and Al(acac)3-Cr(acac)3-Fe (acac)3 were constructed and their eutectic temperatures were determined. The eutectic temperature was obtained at 1: 1 ratio for its binary systems. From the binary phase diagram, ternary phase diagram was constructed. The parent complexes and eutectic complexes were characterized by FT-IR, UV-VIS, XRD, TG/DTA and SEM/EDAX analyses. These binary and ternary eutectics were used for the deposition of the metal oxide thin films over silica by TCVD method. Al2O3 coating over silica catalyses the coating of Cr2O3 or Fe2O3. Bimetallic and tri-metallic oxide thin films can be employed as catalyst for the formation of carbon nanotubes (CNT) by CVD and catalysts. © 2015, International Journal of ChemTech Research. All Rights Reserved.

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