Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
Direct Evidence for Two Interaction Modes in Adsorption of Divalent Metal Ions to Iminodiacetate-Type Chelating Resins
Akio YUCHIKouichi MUKAIEYuka SOTOMURAHiromichi YAMADAHiroko WADA
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2002 Volume 18 Issue 5 Pages 575-577

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Abstract

The adsorption curves of divalent metal ions (M2+) to an iminodiacetate(IDA)-type chelating resin (-L2-) under the condition of metal ions in excess against IDA groups clearly indicated the difference in contribution between two species. Copper and nickel are adsorbed only as [(-L)MII], while cadmium and calcium are adsorbed as [(-L)MII] and [(-LH)2MII]. Addition of salts may enhance the deprotonation of IDA groups, interfere with the adsorption as [(-LH)2MII], and yield remarkable changes in adsorption curves, depending on the metal ions.

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© 2002 by The Japan Society for Analytical Chemistry
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