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  • 1 Analytical Research Laboratory, I.F.T.M. University, Delhi Road, Moradabad, UP, India
  • 2 L-35, Sector-25, Jalvayu Vihar, Noida 201301, UP, India
  • 3 Department of Chemistry, University of Guelph, 50 Stone Rd. E, Guelph, ON, N1G 2W1, Canada
  • 4 Department of Chemical Technologies and Environment, Faculty of Industrial Technologies, Trenčín University of A. Dubček, SK-020 32, Púchov, Slovakia
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Abstract

A number of silicon-based inorganic ion exchangers were synthesized under different conditions of preparation. The original and regenerated ion exchange capacities (IECs) were determined. Thermal stability of these materials was investigated in the temperature range of 40–800 °C. The gain/loss of IEC was studied as a function of temperature. These exchangers show a higher IEC and its retention to a considerable extent at elevated temperatures when compared to that of corresponding ion exchangers which do not contain silica. The thermogravimetric curve shows greater percent mass loss in H+ form of the exchanger than in K+ form. Dehydration studies seem to throw some light on the state of water molecules present in various samples. The empirical formula and the tentative structure for stannic arseno silicate have also been proposed.

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  • 30. Pajtášová, M, Ondrušová, D, Jóna, E, Mojumdar, SC, Ľalíková, S, Bazyláková, T, Gregor, M 2010 Spectral and thermal characteristics of copper(II) carboxylates with fatty acid chains and their benzothiazole adducts. J Therm Anal Calorim 100:769777 .

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  • 31. Madhurambal, G, Ramasamy, P, Anbusrinivasan, P, Vasudevan, G, Kavitha, S, Mojumdar, SC 2008 Growth and characterization studies of 2-bromo-4′-chloro-acetophenone (BCAP) crystals. J Therm Anal Calorim 94:5962 .

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  • 35. Moricová, K, Jóna, E, Plško, A, Mojumdar, SC 2010 Thermal stability of Li2O–SiO2–TiO2 gels evaluated by the induction period of crystallization. J Therm Anal Calorim 100:817820 .

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