Mixing of carbonate waters
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Abstract
When mineral solutions of different compositions are mixed, the molalities and activities of individual ions in the mixture are often non-linear functions of their end-member values. This non-linearity is particularly significant in determining mineral saturation levels. Mixtures of saturated solutions may be either undersaturated or supersaturated depending on the end-member compositions and the physical conditions in which end-members and their mixtures exist. In carbonate solutions important non-linear effects occur due to redistribution of carbonate species. In extreme cases this causes mixture pH to be below both the end-member pH values. A simple but precise computer program (WATMIX) has been developed for calculating mixture composition for closed and open system mixing of arbitrary end-members. A number of mixing examples are considered which allow one to isolate three important processes leading to non-linear behaviour: the algebraic effect, the δPCO2 effect, and the ionic strength effect.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Mixing of carbonate waters |
| Series title | Geochimica et Cosmochimica Acta |
| DOI | 10.1016/0016-7037(76)90041-7 |
| Volume | 40 |
| Issue | 9 |
| Year Published | 1976 |
| Language | English |
| Publisher | Elsevier |
| Description | 7 p. |
| First page | 989 |
| Last page | 995 |
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