Interaction of Neptunyl(V) and Uranyl(VI) with EDTA in NaCl Media: Experimental Study and Pitzer Modeling

Sequestering ability of polyaminopolycarboxylic ligands towards dioxouranium(VI) cation

“…NIST[39] selected stability constants for (UO 2 ) p L q H r (2p−zq+r) species I = 0.7 mol L −1 in NaCl aq , t = 25 • C) are in excellent agreement with those reported by Pokrovsky et al[52] [at I = 1 mol kg −1 (H 2 O) in NaCl aq , t = 25 • C]. In fact, by taking into account slight differences in ionic strength values, they reported (see…”

“…Despite the great importance of both polyaminopolycarboxylic ligands and dioxouranium(VI) cation, relatively few papers dealing with the determination of sequestering ability of the formers towards the latter are present in literature [44][45][46][47][48][49][50][51][52]. Some literature data on uranyl-complexone interactions are reported in Table 6.…”

“…Stability data on metal-complexone interactions are reported in many papers and databases [34][35][36][37][38][39], and some specific compilations for a critical evaluation of stability constants of species formed in metal-complexone systems were also done by Anderegg et al [22,[40][41][42][43]. Unfortunately, despite a sufficient number of papers dealing with the binding ability of polyaminopolycarboxylic compounds towards UO 2 2+ [44][45][46][47][48][49][50][51][52], data reported in literature are generally not homogeneous about the correct speciation model for UO 2 2+ -complexone systems and the relative stability of their complexes. In some cases, some of these published data do not meet criteria for critical selection by some stability constant databases (see, e.g., ref.…”

Use of Dissolved and Colloidal Actinide Parameters within the 1996 Waste Isolation Pilot Plant Compliance Certification Application

“…Pitzer parameters or data used to calculate Pitzer parameters for actinides in the +III oxidation state in high ionic strength brines have been reported by Fanghinel et aL, 1994;Felmy et aL, 1995;Felmy et aL, 1990;Felmy et aL, 1989;Novak et aL, 1995;Rai et aL, 1992a,b; Pokrovsky et aL, 1998;and Martell and Smith, 1977. Data for much of the organic ligand work: performed for WIPP has either already been published in the literature (including this volume) or will be published in the near future.…”

Investigation of Pu(IV)-acetohydroxamic acid complex by solvent extraction with di(2-ethylhexyl) phosphoric acid

“…Solvent extraction of radiotracer solutions has shown to be an effective method for determining stability constants of actinide-organic ligand complexation [1][2][3][4]. It is particularly useful when concentrations of metals are low.…”