Abstract
Chelex 100 chelating resin in sodium form was found to be significantly hydrolysable. Contact with de-ionised water in solution volume to exchanger weight ratios of 10-4000 yielded a conversion to hydronium form of 1 to 10%. Hydrolysis brought sodium ions into solution with concentrations of 0.05-1.5 mM and increased the pH from 6.1 to 8.7-10.0. Hydrolysis has a marked effect on the nickel ion exchange on Chelex 100 in dilute nickel solutions (<0.1 mM): hydrolysis controls the sodium ion concentration in the solution and the increasing pH diminishes the absorption of nickel.
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© 1992 United Kingdom Atomic Energy Authority
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Lehto, J., Paajanen, A., Harjula, R., Leinonen, H. (1992). Hydrolysis of Chelex 100 Chelating Resin and its Effect on Nickel Ion Exchange. In: Slater, M.J. (eds) Ion Exchange Advances. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2864-3_53
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DOI: https://doi.org/10.1007/978-94-011-2864-3_53
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-85166-882-3
Online ISBN: 978-94-011-2864-3
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