Interactions of Dioxouranium(VI) with Polyamines in Aqueous Solution

Alberto Pettignano, Antonio Gianguzza, Francesco Crea, Silvio Sammartano

Risultato della ricerca: Articlepeer review

6 Citazioni (Scopus)

Abstract

The interaction of the dioxouranium(VI) ion with five low molecular weight polyamines (ethylenediamine,putrescine, cadaverine, spermidine, and spermine) and with poly(allyl)amine (15 kDa) was studiedpotentiometrically (ISE-H+ glass electrode) at T ) 298.15 K. Investigations were carried out in NaNO3ionic medium, at I ) 0.1 mol ·L-1 (and 0.5 mol ·L-1 for poly(allyl)amine only), in the pH range 3.5 to 5.5,before the formation of uranyl insoluble species. The results gave evidence for the formation of two species,namely, UO2L2+ and UO2L(OH)+ for the diamine systems (ethylenediamine, putrescine, cadaverine), UO2L2+and UO2LH3+ for spermidine, and UO2LH3+ and UO2LH24+ for spermine. In the systemUO2-poly(allyl)amine, four species, namely, UO2L2+, UO2LH3+, UO2LH24+, and UO2L(OH)+, are formed.Speciation profiles of the different systems and the sequestration capability of amines at various pH valuesare discussed. Some empirical relationships regarding the formation constants of complex species are alsoreported.
Lingua originaleEnglish
pagine (da-a)3044-3050
Numero di pagine7
RivistaJournal of Chemical and Engineering Data
Volume55
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.1500.1500???

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