Navyug Commerce College

Surat, India

Navyug Commerce College

Surat, India
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Vashi R.T.,Navyug Commerce College | Naik D.,Science and Commerce College
E-Journal of Chemistry | Year: 2010

The corrosion of zinc in phosphoric acid containing hexamine has been studied at different acid concentrations, inhibitor concentration and temperatures. Corrosion increases with the concentration of acid and the temperature. The inhibition efficiency (IE) of hexamine increases with the concentration of inhibitor. The IE decreases with the increase in concentration of acid. As temperature increases, percentage of inhibition decreases. The plot of log (θ/1-θ) versus log C results in a straight line suggest that the inhibitors cover both the anodic and cathodic regions through general adsorption following Longmuir isotherm. Galvenostatic polarization curves show polarization of both anodes as well as cathodes.


Godre S.S.,Veer Narmad South Gujarat University | Desai P.R.,Navyug Commerce College
Nuclear Physics A | Year: 2010

A classical rigid-body dynamics model is used for study of Coulomb reorientation effect on the fusion dynamics. Model calculations show that barrier parameters depend on the initial orientations and also on the collision energy. Calculated fusion cross sections for 24Mg+208Pb and 16O+154Sm reactions show that reorientation effect is more pronounced in the case of 24Mg+208Pb reaction which involves a lighter deformed nucleus. © 2009 Elsevier B.V. All rights reserved.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
Journal of Saudi Chemical Society | Year: 2012

The textile dyeing industry consumes large quantities of water and produces large volumes of wastewater from different processes in dyeing and finishing processes. The low-cost, easily available naturally prepared coagulants like Surjana seed powder (SSP), Maize seed powder (MSP) and Chitosan as an ideal alternative to recent expensive coagulant methods for Congo Red (CR) dye removal has been investigated in this study. Various process parameters like pH, coagulant dose, flocculation time and temperature and also its optimization were exploited. The maximum percentage CR removal was found to be 98.0, 94.5 and 89.4 for SSP, Chitosan and MSP, respectively, at pH 4.0, coagulant dose of 25. mg/l, flocculation time 60. min and temperature of 340. K. The Sludge Volume Index (SVI) and turbidity were calculated for these parameters including process optimization. SSP found more preferable for CR removal and Chitosan was a better coagulant, which corresponds to SVI than the other coagulants investigated. © 2011.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
Global Nest Journal | Year: 2013

The wastewater generated by the textile industry is rated as the most polluting among all industrial sectors considering both volumes discharged and effluent composition. Present investigation intended for COD and color removal from textile wastewater using naturally prepared coagulants i.e. Surjana Seed Powder (SSP), Maize Seed Powder (MSP) and Chitosan. Effect of coagulant dose, flocculation time and temperature has been studied. The Sludge Volume Index (SVI) and turbidity were examined for various effects. SSP was more effective than Chitosan and MSP for the removal of COD and color and also, Chitosan was more efficient than SSP and MSP considering SVI and turbidity. Maximum percentage reduction corresponds to 75.6 and 62.8 was obtained for removal of COD and color respectively, using SSP. © 2013 Global NEST Printed in Greece. All rights reserved.


Vashi R.T.,Navyug Commerce College | Shelat C.D.,Navyug Commerce College
Asian Journal of Chemistry | Year: 2010

Two new ligands, HL1 and HL2 were synthesized from anthranilic acid and 5-bromo anthranilic acid, respectively. For this, quinazoline-4-one 8-hydroxyquinoline (QHQ) merged molecules were used. The complexes of first transition metals like Cu(II), Ni(II), Co(II), Mn(II) and Zn(II) with HL1 and HL2 have been prepared and characterized by physicochemical methods such as elemental analysis, conductometric studies, magnetic susceptibility, infrared, NMR and electronic spectral data. The stoichiometry of the complexes has been found to be 1:2 (metal:ligand). An octahedral geometry around Co(II), Ni(II) and Mn(II), distorted octahedral geometry around Cu(II) and tetrahedral geometry around Zn(II) have been proposed. These complexes also been tested for their antifungal activities.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
E-Journal of Chemistry | Year: 2010

The composite of wastewater treatment was carried out using activated charcoal as adsorbent to remove COD, BOD, color in which various parameters like adsorbent dose, contact duration, temperature and agitator speed were considered. The adsorbent behavior can be explained on the basis of Freundlich and Langmuir adsorption isotherm model. Maximum removal (87.6, 81.0 and 90.0%) of COD, BOD and color respectively was found at adsorbent dosage of 11 g/L. Also, the textile mill wastewater was treated with different doses of coagulants like alum, ferric sulphate and ferrous sulphate at constant contact duration (4 hours) and room temperature (300 K). Percentage reduction (maximum) corresponds to 80.2, 74.0 and 84.9% was obtained for removal of COD, BOD and color respectively.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
E-Journal of Chemistry | Year: 2010

The present investigation describes adsorption of crystal violet dye from its aqueous solution onto tamarind (Tamarindus indica) fruit shell powder. Initial concentration, agitation speed and pH with various temperature have been studied, in which pH was found to be most effective. The adsorption data were mathematically analyzed using adsorption isotherm like Freundlich and Langmuir isotherm to study adsorption mechanism of crystal violet onto this seed powder. Freundlich isotherm was found to be most applicable. The equilibrium data were applied to intra-particle diffusion and adsorption kinetics. The reaction was found to be pseudo second order.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
Journal of Environmental Engineering and Landscape Management | Year: 2013

The adsorption of basic dye, Methylene Blue Dye (MBD) onto neem (Azadirachta indica) leaf powder (NLP) and activated NLP with sulphuric acid was compared in this investigation. The surface analyses of NLP and activated NLP (particle size distribution, porosity, pore volume, pore diameter and BET surface area) were conducted using sophisticated instrument. The process parameters like adsorbent dose, pH, temperature and contact duration have been studied. The experimental data were analyzed using Langmuir and Freundlich isotherm, in which adsorption capacities and intensities were evaluated. Three kinetic models, pseudo first-, second-order and Elovic equations were applied to describe the adsorption process, in which correlation coefficient for each kinetic equation were calculated and evaluated. © 2013 Copyright Vilnius Gediminas Technical University (VGTU) Press.


Patel H.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
Canadian Journal of Chemical Engineering | Year: 2012

The intention of this study was to explore the efficacy and feasibility for Acid Yellow 17 adsorption onto fixed bed column of Tamarind Seed Powder. The effect of various parameters like flow rate, initial concentration of dye, bed height, and pH were exploited in this study. The Thomas, Yoon-Nelson, Bed Depth Service Time (BDST), and Adams and Bohart model were analysed to evaluate the column adsorption performance. The adsorption capacity, rate constant and correlation coefficient associated to each model for column adsorption was calculated and mentioned. The adsorption capacity increases with increasing initial dye concentration and bed height and decreasing flow rate. The maximum adsorption capacity related to Adams and Bohart model was found to be 978.5mg/g at initial concentration of 50ppm at constant flow rate of 15mL/min, bed height of 15cm, and pH 7. © 2011 Canadian Society for Chemical Engineering.


Desai P.S.,Navyug Commerce College | Vashi R.T.,Navyug Commerce College
Indian Journal of Chemical Technology | Year: 2010

The corrosion of aluminium in trichloroacetic acid (TCA) containing xylenol orange has been studied. In TCA, the corrosion rate increases with the increase in acid concentration. At constant acid concentration, the inhibition efficiency of xylenol orange increases with the inhibitor concentration. At constant inhibitor concentration, the inhibition efficiency decreases with the increase in the acid concentration. As temperature increases, percentage of inhibition decreases. Plot of log (9/1-9) versus log C results in a straight line, suggesting that the inhibitor cover both the anodic and cathodic regions through general adsorption following Langmuir isotherm. The polarization curves show very little anodic but significant cathodic polarization.

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