Dissolution of alkaline earth sulfates in the presence of montmorillonite
Water, Air, & Soil Pollution
By: D. D. Eberl and Edward R. Landa
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Abstract
In a study of the effect of montmorillonite on the dissolution of BaSO4 (barite), SrSO4 (celestite), and 226Ra from U mill tailings, it was found that: (1) More of these substances dissolve in an aqueous system that contains montmorillonite than dissolve in a similar system without clay, due to the ion exchange properties of the clay; (2) Na-montmorillonite is more effective in aiding dissolution than is Ca-montmorillonite; (3) the amount of Ra that moves from mill tailings to an exchanger increases as solution sulfate activity decreases. Leaching experiments suggest that 226Ra from H2SO4-circuit U mill tailings from Edgemont, South Dakota, is not present as pure Ra sulfate or as an impurity in anhydrite or gypsum; it is less soluble, and probably occurs as a trace constituent in barite.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Dissolution of alkaline earth sulfates in the presence of montmorillonite |
| Series title | Water, Air, & Soil Pollution |
| DOI | 10.1007/BF00568389 |
| Volume | 25 |
| Issue | 2 |
| Year Published | 1985 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 8 p. |
| First page | 207 |
| Last page | 214 |
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