Uranium Migration/Retention Processes in Core Profiles from El Berrocal (Spain): Implications for Matrix Diffusion in Fractured Granite

Articles in the same Issue

1. Masthead
2. Preface
3. Contents
4. A. Chemistry of Actinides and Fission Products in Natural Aquifers
5. A. 1. Solubility, Dissolution and Leaching
6. Long Term Plutonium Solubility and Speciation Studies in a Synthetic Brine
7. Effect of the Complexation on Solubility of Pu(IV) in Aqueous Carbonate System
8. The Effects of Radiolysis Upon Speciation and Solubility of Neptunium in Brine Solutions
9. Neptunium Uptake on Boom Clay - Time Dependence and Association of Np with Fine Particles
10. Kinetic Studies of Unirradiated UO₂ Dissolution under Oxidizing Conditions in Batch and Flow Experiments
11. A Comparison Between Unirradiated UO₂(s) and Schoepite Solubilities in 1 Μ NaCl Medium
12. Solubility Equilibria in the U(VI)-Ca-K-Cl-H₂O System: Transformation of Schoepite into Becquerelite and Compreignacite
13. Effects of Hypochlorite Ion on the Solubility of Amorphous Schoepite at 25 °C in Neutral to Alkaline Aqueous Solutions
14. Solubility of Nd in Brine
15. A. 2. Hydrolysis, Complexation and Redox Reactions
16. An Independent Method for Data Selection of Long-life Radionuclides (Actinides and Fission Products) in the Geosphere
17. Kinetics of Complexation Reactions at Surfaces and in Solution: Implications for Enhanced Radionuclide Migration
18. Systematics of Hydrolysis and Carbonate Complexation Constants of Ions of Transuranium Elements
19. Thermodynamics of Radioactive Trace Elements in Concentrated Electrolyte Solutions: Hydrolysis of Cm³⁺ in NaCl-Solutions
20. Synthesis of Crystalline Americium Hydroxide, Am(OH)₃ and Determination of its Enthalpy of Formation; Estimation of the Solubility-Product Constants of Actinide(III) Hydroxides
21. Stability of Plutonium(VI) in Selected WIPP Brines
22. Complex Formation of Np(V) with Nitrogen-Containing Carboxylates
23. Thermochemistry of a Few Neptunium and Neodymium Oxides and Hydroxides
24. Redox Chemistry in Uranium-rich Groundwater of Palmottu Uranium Deposit, Finland
25. Variation of Stability Constants of Thorium and Uranium Oxalate Complexes with Ionic Strength
26. Applications of Functionalized Azaphosphanes as Novel Scavenging Agents for TcO₄^-
27. A Comparative Study Employing Three Different Models to Investigate the Complexation Properties of Humic and Fulvic Acids
28. A Study of Metal-Humate Interactions Using Cation Exchange
29. Mixed Complex Formation of Eu³⁺ with Humic Acid and a Competing Ligand
30. The Acid/Base Chemistry of Montmorillonite
31. A. 3. Colloid Formation
32. A Column Experiment for the Study of Colloidal Radionuclide Migration in Gorleben Aquifer Systems
33. Characterization of Colloids by Measurement of Their Mobilities
34. Actinide Association with Groundwater Colloids in a Coastal Plain Aquifer
35. Colloidal Products and Actinide Species in Leachate from Spent Nuclear Fuel
36. Characteristics of Colloids Generated During the Corrosion of Nuclear Waste Glasses in Groundwater
37. Colloid Formation and Sorption of Americium in the Water/Bentonite System
38. The Adsorption of Europium to Colloidal Iron Oxyhydroxides and Quartz - The Impact of pH and an Aquatic Fulvic Acid
39. Interaction of Pseudocolloids with Mineral Surfaces: The Fate of the Scavenged Cation
40. A. 4. Experimental Methods
41. Radiochemical Approaches to the Migration of Elements from a Radwaste Repository
42. The Use of Microanalytical Techniques to Measure the Distribution of Uranium and Plutonium Sorbed on Rocks and Minerals
43. Comparison of Chemical Extractions and Laser Photoacoustic Spectroscopy for the Determination of Plutonium Species in Near-Neutral Carbonate Solutions
44. Robert J. Silva Nuclear Chemistry Division, Lawrence Livermore National Laboratory Mail Stop 458, P. O. Box 808, Livermore, CA 94530, USA
45. Β. Geochemical Interactions and Transport Phenomena
46. B. 1. Sorption
47. Comparison of Sorption Databases Used in Recent Performance Assessments Involving Crystalline Host Rock
48. Parameter Studies of Radionuclide Sorption in Site-Specific Sediment/Groundwater Systems
49. Redistribution of Neptunium(Y) During the Alteration of Ferrihydrite
50. Uranium Sorption on α-Alumina: Effects of pH and Surface-Area/Solution-Volume Ratio
51. Uranium Retention by Weathered Schists - The Role of Iron Minerals
52. Distribution of Uranium and Radionuclides in a Uranium-Mining Rockpile in Schlema, Saxony, Germany
53. Some Factors Affecting the Interactions of Organophilic Clay Minerals with Radioiodine
54. Study of the Kinetics of the Interaction of Cs-137 and Sr-85 with Soils Using a Batch Method: Methodological Problems
55. Redistribution of Strontium and Cesium During Alteration of Smectite to Illite
56. Sorption Characteristics of Radioactive Cesium and Strontium on Smectite
57. Sodium Adsorption onto Goethite as a Function of pH and Ionic Strength
58. Sorption of Nickel on Geological Materials
59. Β. 2. Migration
60. Migration of Uranium: Integrating Geochemistry with Biomonitoring to Evaluate and Predict its Environmental Impact
61. Migration Behaviour of Pu Released from Pu-doped Glass in Compacted Bentonite
62. Transport of Europium and Iodine through Sand Columns in the Presence of Humic Acids
63. Migration Behaviour of Barium and Strontium in Granite
64. Migration of ^134,137Cs Radionuclides in the Soil and Uptake by Plants in German Spruce Forests
65. Accumulation Factors and Biogeochemical Aspects of Migration of Radionuclides in Aquatic Ecosystems in the Areas Impacted by the Chernobyl Accident
66. Migration Behaviour of ¹⁴C Labelled Bicarbonate, HTO and ¹³¹I in Boom Clay
67. The Dependence of Waste Form Dissolution on Migration Phenomena in the Host Medium
68. Β. 3. Diffusion
69. Diffusion of Neptunium(V) in Loosely Compacted Sodium Bentonite
70. Release and Diffusion of ⁹⁰Sr from Spent UO₂ Fuel in Bentonite Clay
71. Diffusion in Homogeneous and Heterogeneous Rock Matrices. A Comparison of Different Experimental Approaches
72. The Dispersion of ¹³⁷Cs in the Aegean Sea
73. B. 4. Effects of Organic Materials
74. Effect of Natural Organics on Cs and Np Sorption
75. The Role of Low Molecular Weight Natural Organics in Metal Humate Interactions
76. Redissolution of Cesium Radionuclides from Sediments of Freshwater Lakes Due to Biological Degradation of Organic Matter
77. Effects of Cellulosic Degradation Product Concentration on Actinide Sorption on Tuffs from the Borrowdale Volcanic Group, Sellafield, Cumbria
78. Geochemical Association of Plutonium in Marine Sediments from Palomares (Spain)
79. Factors Influencing the Diffusion of Uranium, Plutonium and Radium through Sherwood Sandstone from Sellafield, Cumbria
80. Β. 5. Natural Analogs
81. Petrographic Analysis of Samples from the Uranium Deposit at Oklo, Republic of Gabon
82. Migration of Fission Products into Micro-Minerals of the Oklo Natural Reactors
83. Retention of Actinides in Natural Pyrochlores and Zirconolites
84. Uranium Migration/Retention Processes in Core Profiles from El Berrocal (Spain): Implications for Matrix Diffusion in Fractured Granite
85. Uranium Series Isotopic Study of Fracture Infill Materials from El Berrocal Site, Spain
86. Permeability Effects on Radionuclide Migration in a Highly Fractured Zone in the Lac du Bonnet Batholith, Canada
87. Role of Microscopic Flow-Paths on Nuclide Migration in Sedimentary Rocks
88. Author Index