Reactive transport modeling at uranium in situ recovery sites: uncertainties in uranium sorption on iron hydroxides
By: Raymond H. Johnson and Hlanganani Tutu
Edited by: Adrian Brown, Linda Figueroa, and Christian Wolkersdorfer
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Abstract
Geochemical changes that can occur down gradient from uranium in situ recovery (ISR) sites are important for various stakeholders to understand when evaluating potential effects on surrounding groundwater quality. If down gradient solid-phase material consists of sandstone with iron hydroxide coatings (no pyrite or organic carbon), sorption of uranium on iron hydroxides can control uranium mobility. Using one-dimensional reactive transport models with PHREEQC, two different geochemical databases, and various geochemical parameters, the uncertainties in uranium sorption on iron hydroxides are evaluated, because these oxidized zones create a greater risk for future uranium transport than fully reduced zones where uranium generally precipitates.
Suggested Citation
Johnson, R.H., Tutu, H., 2013, Reactive transport modeling at uranium in situ recovery sites: uncertainties in uranium sorption on iron hydroxides, in Annual International Mine Water Association Conference: Reliable Mine Water Technology, v. I, p. 377-382.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Reactive transport modeling at uranium in situ recovery sites: uncertainties in uranium sorption on iron hydroxides |
| Volume | I |
| Year Published | 2013 |
| Language | English |
| Publisher | International Mine Water Association |
| Contributing office(s) | Crustal Geophysics and Geochemistry Science Center |
| Description | 6 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Annual International Mine Water Association Conference: Reliable Mine Water Technology |
| First page | 377 |
| Last page | 382 |