A thermochemical study of complex formation in chelating ion-exchange resins
1995; Elsevier BV; Volume: 256; Issue: 2 Linguagem: Inglês
10.1016/0040-6031(94)02036-n
ISSN1872-762X
AutoresS.V. Kertman, G.M. Kertman, Yu.A. Leykin,
Tópico(s)Organophosphorus compounds synthesis
ResumoThe process of sorption of transition metal ions from nitrate solutions onto chelating ion-exchange resins containing amino, phosphonic and aminophosphonic acid groups has been studied with the help of a Calvet microcalorimeter. Direct calorimetric measurements were performed at different degrees of exchange and the enthalpy variations for the system were obtained. In this work it is shown what the Irving-Williams rule holds for amino groups containing AS resin. In the case of phosphonic acid groups containing KRF resin, the ΔH of sorption of the transition metal ions depends on the Cartledge ionic potential.
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