Speciation of the rare earth element neodymium in groundwaters of the Nevada Test Site and Yucca Mountain and implications for actinide solubility : K. H. Johannesson, K. J. Stetzenbach & V. F. Hodge, Applied Geochemistry, 10(5), 1995, pp 565–572
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 174 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0148-9062
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✦ Synopsis
Current design concepts for low-/intermediate-level radioactive waste disposal in many countries involve emplacement underground in a cementitious repository. The highly alkaline groundwaters at Maqarin, Jordan, are a good analogue for the cementitious pore waters that will be present within such a repository. A geochemical modelling study of these groundwaters has been carried out in order to test the applicability of equilibrium models in geochemical programs and their associated thermodynamic databases in such hyperalkaline conditions. Comparison of the observed solids with those predicted by the models has allowed limited validation of the databases. The results for U and Se are presented here.