Feldspar Dissolution in Acidic and Organic Solutions: Compositional and pH Dependence of Dissolution Rate

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Geochimica et Cosmochimica Acta

DOI:https://doi.org/10.1016/0016-7037(96)00134-2· OSTI ID:834184

Welch, S A ^[1]; Ullman, W J

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1. College of Marine Studies, University of Delaware, Lewes, DE

The steady-state dissolution rates of plagioclase feldspars into inorganic acid and neutral solutions in a flow-through reactor increased with Al content of the mineral. The results of these experiments were used to develop a two-termed empirical model where both terms have a dependence on the mineral composition. A similar trend was observed for minerals dissolving in organic solutions, but dissolution rates were up to one order of magnitude higher than those observed in the inorganic solutions. An empirical model of dissolution in organic solutions requires an additional term that includes ligand concentration.

• Research Organization: College of Marine Studies, University of Delaware, Lewes, DE (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: FG02-91ER61184
• OSTI ID: 834184
• Journal Information: Geochimica et Cosmochimica Acta, Journal Name: Geochimica et Cosmochimica Acta Journal Issue: 16 Vol. 60; ISSN GCACAK; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
ANORTHOSITES
DISSOLUTION
FELDSPARS
INORGANIC ACIDS