Thermodynamic Properties of Actinide Aqueous Species Relevant to Geochemical Problems

The status of our knowledge of the basic thermodynamic properties of the aqueous complexes of the actinides in their different valency states with two environmentally important ligands, namely hydroxide and carbonate, is overviewed. Even in the case of uranium which has been the most studied, gaps are found among the relative wealth of trustworthy formation constants, especially for the less stable valence states. The need for substantial improvement of our knowledge in the case of the other actinides, especially transuranium elements, is outlined. The relative scarcity of enthalpy of formation data is also stressed.

[1]  Hans Wanner,et al.  Chemical thermodynamics of uranium , 1992 .

[2]  J. I. Kim,et al.  The Carbonate Complexation of the Am(III) Ion , 1991 .

[3]  G. Choppin,et al.  Hydrolysis of Actinyl(VI) Cations , 1991 .

[4]  P. Vitorge,et al.  Temperature and ionic strength influence on U(VI/V) and U(IV/III) redox potentials in aqueous acidic and carbonate solutions , 1990 .

[5]  Andrew R. Felmy,et al.  Uranium(IV) hydrolysis constants and solubility product of UO2.cntdot.xH2O(am) , 1990 .

[6]  K. Higashi,et al.  Carbonate Complexation of Neptunium(IV) and Analogous Complexation of Ground-Water Uranium , 1990 .

[7]  K. Higashi,et al.  The solubility and colloidal behaviour of neptunium (IV). , 1989, The Science of the total environment.

[8]  I. Grenthe,et al.  Studies of metal carbonate equilibria. 20. Formation of tetra(carbonato)uranium(IV) ion, U(CO3)44−, in hydrogen carbonate solutions , 1989 .

[9]  Chantal Riglet.  Chimie du neptunium et autres actinides en milieu carbonate , 1989 .

[10]  G. A. Parks,et al.  Hydrothermal solubility of uraninite , 1988 .

[11]  W. Ullman,et al.  Calorimetric Determination of the Enthalpies of the Carbonate Complexes of U(VI), Np(VI). and Pu(VI) in Aqueous Solution at 25° C , 1988 .

[12]  S. Stadler,et al.  Hydrolysis Reactions of Am (II I) and Am(V) , 1988 .

[13]  J. Ryan,et al.  Thorium(IV) hydrous oxide solubility , 1987 .

[14]  F. Rösch,et al.  Electromigration of carrier-free radionuclides , 1987 .

[15]  I. Grenthe,et al.  Studies of Metal - Carbonate Complexes. Part 14. Composition and Equilibria of Trinuclear Neptunium(VI)- and Plutonium(VI)- Carbonate Complexes. , 1986 .

[16]  I. Grenthe,et al.  Chemical equilibria in actinide carbonate systems , 1986 .

[17]  I. Grenthe,et al.  Studies of metal−carbonate complexes. XIV: Composition and equilibria of trinuclear neptunium(VI)- and plutonium(VI)−carbonate complexes , 1986 .

[18]  M. Muñoz,et al.  The Determination of the Solubility of Amorphous UO 2 (Sn and the Mononuclear Hydrolysis Constants of Uranium(IV) at 25° C. , 1986 .

[19]  J. I. Kim,et al.  Hydrolysis Reactions of Neptunium (V) , 1985 .

[20]  G. Bidoglio,et al.  Studies on Neptunium (V) Carbonate Complexes under Geologic Repository Conditions , 1985 .

[21]  L. Maya.  Carbonate complexation of dioxoneptunium(VI) at 25.degree.C: its effect on the neptunium(V)/neptunium(VI) potential , 1984 .

[22]  I. Grenthe,et al.  Studies on metal carbonate equilibria. 9. Calorimetric determination of the enthalpy and entropy changes for the formation of uranium(IV and VI) carbonate complexes at 25 °C in a 3 M (Na,H)ClO4 ionic medium , 1984 .

[23]  R. Hahn,et al.  Raman spectroscopy of neptunyl and plutonyl in aqueous solutions: hydrolysis of Np(VI) and Pu(VI) and disproportionation of Pu(V) , 1984 .

[24]  Jiufang Lu,et al.  Hydrophilic Complexes of the Actinides. III. Lactates of Am(3+), Eu(3+), U(4+) and UO2(2+). , 1984 .

[25]  I. Grenthe,et al.  Studies on metal carbonate equilibria. Part 10. A solubility study of the complex formation in the uranium(VI)–water–carbon dioxide (g) system at 25 °C , 1984 .

[26]  P. Brown.  Studies on the hydrolysis of metal ions , 1984 .

[27]  I. Grenthe,et al.  Studies on metal carbonate equilibriums. 4. Reduction of the tris(carbonato)dioxouranate(VI) ion, UO2(CO3)34-, in hydrogen carbonate solutions , 1983 .

[28]  J. Ryan,et al.  Am(lll) Hydrolysis Constants and Solubility of Am(lll) Hydroxide , 1983 .

[29]  L. Maya.  Hydrolysis and carbonate complexation of dioxoneptunium(V) in 1. 0 M NaClO/sub 4/ at 25/sup 0/C , 1983 .

[30]  I. Grenthe,et al.  Studies on metal carbonate equilibria. 4. Reduction of the tris(carbonato)dioxouranate(VI) ion, UO/sub 2/(CO/sub 3/)/sub 3//sup 4 -/, in hydrogen carbonate solutions , 1983 .

[31]  J. R. Peterson,et al.  Coexistence of americium in four oxidation states in sodium carbonate-sodium bicarbonate medium , 1983 .

[32]  G. Choppin,et al.  The Determination of the First Hydrolysis Constant of Eu(lll) and Am(lll) , 1983 .

[33]  K. Schmidt,et al.  The hydrolysis of neptunium(VI) and plutonium(VI) studied by the pulse radiolysis transient conductivity technique , 1983 .

[34]  N. Edelstein,et al.  Thermodynamic properties of chemical species in nuclear waste , 1982 .

[35]  G. Choppin,et al.  Thermodynamics of Plutonium ( V I ) Interaction with Bicarbonate , 1982 .

[36]  J. K. Joshi,et al.  Hydrolysis Constants of Plutonium(lll) and Americium(lll) , 1982 .

[37]  I. Wadsö,et al.  Hydrophilic Complexes of the Actinides. I. Carbonates of Trivalent Americium and Europium. , 1982 .

[38]  N. Milic.  Linear free-energy relationships in the hydrolysis of metal ions. The effect of the ionic medium , 1981 .

[39]  R. Thompson,et al.  A PULSE RADIOLYSIS STUDY OF THE REDUCTION OF NEPTUNIUM(V) BY THE HYDRATED ELECTRON , 1980 .

[40]  J. C. Sullivan,et al.  A DETERMINATION OF THE STABILITY QUOTIENT FOR THE FORMATION OF A TRIS(CARBONATO)PLUTONATE(VI) COMPLEX IN AQUEOUS SOLUTION , 1979 .

[41]  Gregory R. Choppin,et al.  The Chemical Thermodynamics of Actinide Elements and Compounds , 1979 .

[42]  D. M. Nelson,et al.  Oxidation state of plutonium in the Irish Sea , 1978, Nature.

[43]  R. D. Shannon.  Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides , 1976 .

[44]  H. A. Øye,et al.  STUDIES ON THE HYDROLYSIS OF METAL IONS PART 62, THE PLUTONYL ION IN SODIUM PERCHLORATE MEDIUM , 1975 .

[45]  L. Magon,et al.  Soluble intermediates in the hydrolysis of neptunium(VI) and comparison with other actinides(VI) , 1972 .

[46]  L. Magon,et al.  Hydrolysis of Plutonium(VI) : Acidity Measurements in Perchlorate Solutions , 1972 .

[47]  L. Ehrenberg,et al.  On the Hydrolysis of Plutonyl Ion in Sodium Perchlorate Medium. , 1971 .

[48]  A. Moskvin.  HYDROLYTIC BEHAVIOR OF NEPTUNIUM(IV, V, VI). , 1971 .

[49]  L. G. Sillén,et al.  STUDIES ON THE HYDROLYSIS OF METAL IONS. 53. PRELIMINARY NOTE ON THE HYDROLYSIS OF THORIUM(IV) , 1964 .

[50]  H. Leider,et al.  THE SOLUBILITY OF URANIUM(IV) HYDROXIDE IN SOLUTIONS OF SODIUM HYDROXIDE AND PERCHLORIC ACID AT 25 °C , 1957 .

[51]  H. Leider,et al.  The Solubility of Uranium Trioxide, UO3·H2O, in Solutions of Sodium Hydroxide and Perchloric Acid at 25°1 , 1955 .