Browsing by Author "Karthikeyan G"
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Item ADSORPTION AND EQUILIBRIUM STUDIES ON REMOVAL OF COPPER(II) BY CHITIN(Journal of the Indian Chemical Society, 2005) Karthikeyan G; Muthulakshmi Andal N; Anbalagan KThe adsorption of Cu2+ ions by chitin was studied in alkaline, neutral and acidic media and also under different experimental conditions like contact time, particle size of the adsorbent, pH of the medium and temperature to establish the optimum conditions. The effect of temperature on the adsorption process was verified by batch equilibration method. The experimental results revealed that the adsorption occurred as a spontaneous one. The equilibrium and activation parameters of the adsorption reaction were determined to assess the nature of adsorption. The adsorption increased with temperature. The results imply that the adsorption process is endothermic and spontaneous.Item ADSORPTION DYNAMICS AND EQUILIBRIUM STUDIES OF ZN(II) ONTO CHITOSAN(Journal of Chemical Sciences, 2004) Karthikeyan G; Anbalagan K; Muthulakshmi Andal NBatch equilibration studies are conducted to determine the nature of adsorption of zinc (II) over chitosan. The factors affecting the adsorption process like particle size, contact time, dosage, pH, effects of chloride and nitrate are identified. The influence of temperature and co-ions on the adsorption process is verified. The fraction of adsorption, Ytand the intraparticle diffusion rate constant, kpare calculated at different environments and the results are discussed. The nature of adsorption of the zinc (II)-chitosan system is explained using Freundlich, Langmuir isotherms and thermodynamic parametersItem ADSORPTION STUDIES OF IRON(III) ON CHITIN(Journal of Chemical Sciences, 2005) Karthikeyan G; Muthulakshmi Andal N; Anbalagan KAdsorption of ferric ions by chitin was studied by the batch equilibration method. The influence of particle size and dosage of the adsorbent, contact time, initial concentration of the adsorbate and temperature were experimentally verified. The effect of anions like chloride, nitrate and sulphate and also of cations like zinc, chromium and copper on the adsorption of iron(III) was determined. The time dependence of fraction of adsorption, Yt, at varying particle sizes and doses of chitin and the intraparticle diffusion rate constants, kp, of the adsorption process were calculated. Thermodynamic and equilibrium parameters of the reaction were determined to understand the sorption behavior of chitin. The results revealed that the adsorption of iron(III) by chitin is spontaneous, endothermic and favourable.Item DEFLUORIDATION PROPERTY OF BURNT CLAY(Indian Water Works Association, 1999) Karthikeyan G; Muthulakshmi Andal N; Saravana Sundar GRemoval of fluoride ions from aqueous solutions using burnt clay (brick powder) by both Batch and Column methods are discussed.