Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate

Articles in the same Issue

1. Preface: Migration Conference 1999
2. The influence of near field hydrogen on actinide solubilities and spent fuel leaching
3. Experimental determination and chemical modelling of radiolytic processes at the spent fuel/water interface
4. Thermodynamic data for the solubility of tin(IV) in aqueous cementitious environments
5. Leaching behaviour of UO₂ containing α-emitting actinides
6. Dehydration of synthetic autunite hydrates
7. Aqueous dissolution kinetics of pyrochlore, zirconolite and brannerite at 25, 50, and 75 °C
8. Complex formation of Np(V) with humic acid and polyacrylic acid
9. Investigation of humic acid complexation behavior with uranyl ions using modified synthetic and natural humic acids
10. Solution coordination chemistry of uranium in the binary UO₂²⁺-SO₄^2- and the ternary UO₂²⁺-SO₄^2--OH^- system
11. The speciation of Tc(IV) in chloride solutions
12. The hydrolysis of uranium(VI) in sulfate media
13. Complex formation of Eu(III) with polyacrylic acid
14. Determination of Co(II) and Ni(II)-humate stability constants at high ionic strength NaCl solutions
15. Analysis of Th(IV)-humate by XPS
16. EXAFS structural analysis of aqueous uranium(VI) complexes with lignin degradation products
17. Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Co²⁺-oxalate system
18. Mixed Ca²⁺/UO₂²⁺/CO₃^2- complex formation at different ionic strengths
19. Humic colloid-borne Np migration: influence of the oxidation state
20. Reduction of Pu(V) by humic acid
21. Colloid-borne uranium and other heavy metals in the water of a mine drainage gallery
22. Application of LIBD to the determination of the solubility product of thorium(IV)-colloids
23. The Rossendorf Beam Line ROBL – a dedicated experimental station for XAFS measurements of actinides and other radionuclides
24. Extended X-ray absorption fine structure and time differential perturbed angular correlation study of hafnium(IV) sorbed onto amorphous silica
25. Speciation analysis on europium(III) using laser-induced breakdown spectroscopy
26. The migration behavior of Np(V) in sandy soil and granite media in the presence of humic substances
27. Uranium(VI) and neptunium(V) transport through fractured, hydrothermally altered concrete
28. Experimental study and modeling of uranium (VI) transport through ferrous olivine rock columns
29. Aqueous Pu(IV) sorption on brucite
30. Surface spectroscopic studies of Cs⁺, and Ba²⁺ sorption on chlorite-illite mixed clay
31. Approaches to modelling uranium(VI) adsorption on natural mineral assemblages
32. Evaluation of radioactive nickel distribution coefficient by analyzing background stable nickel
33. Application of electrokinetic data to test the adsorption models
34. Sorption equilibrium and kinetics of NpO₂⁺ on dispersed particles of Na-montmorillonite
35. Sorption of Am(III) and Eu(III) onto γ-alumina: experiment and modelling
36. Effects of humic acid on the sorption of Am(III) and Cm(III) on kaolinite
37. Uranium(VI) sorption onto phyllite and selected minerals in the presence of humic acid
38. The partitioning of uranium and neptunium onto hydrothermally altered concrete
39. Alteration products of uraninite from the Colorado Plateau
40. Fracture-filling minerals as uranium sinks and sources, a natural analogue study at Palmottu, Finland
41. Spectroscopic properties of uranium(VI) minerals studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS)
42. Fracture smectite as a long-term sink for natural radionuclides – indications from unusual U-series disequilibria
43. The potential of subterranean microbes in facilitating actinide migration at the Grimsel Test Site and Waste Isolation Pilot Plant
44. Application of gel electrophoretic techniques to the investigation of actinide-humic interactions in soils
45. Applications of NAA, PIXE and XPS for the quantification and characterization of the humic substances/iodine association
46. Quantitative assessment of radiocaesium bioavailability in forest soils
47. Actinide partitioning to an acidic, sandy lake sediment
48. Adsorption of Cs and U(VI) on soils of the Australian arid zone
49. Natural and artificial radionuclides in forest and bog soils: Tracers for migration processes and soil development
50. Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate
51. An electrostatic approach for the prediction of actinide complexation constants with inorganic ligands-application to carbonate complexes
52. Determination and uncertainties of radioelement solubility limits to be used by SKB in the SR 97’ performance assessment exercise