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Mineral saturation states in natural waters and their sensitivity to thermodynamic and analytic errors

Sciences Geologiques - Bulletin

By:
and

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Abstract

Saturation indices computed with WATEQ4F for chemical analyses from a groundwater in crystalline bedrock and a surface water receiving acid mine drainage are frequently at or above saturation with respect to calcite, fluorite, barite, gibbsite and ferrihydrite. A sensitivity analysis has been performed by varying the analytic and thermodynamic parameters for which the saturation indices are most sensitive. For calcite, fluorite and barite, the supersaturation effect appears to be real because it is only slightly decreased by sources of uncertainty. Apparent supersaturation for gibbsite is most likely caused by the degree of crystallinity on solubility behavior. Apparent supersaturation for ferric hydroxide is likely caused by small colloidal particles (<0.1 ??m) in the water sample that cannot be removed by standard field filtration, although several other possible explanations cannot be easily excluded. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mineral saturation states in natural waters and their sensitivity to thermodynamic and analytic errors
Series title:
Sciences Geologiques - Bulletin
Volume
42
Issue:
4
Year Published:
1989
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Sciences Geologiques - Bulletin
First page:
269
Last page:
280