Evaluation of errors in geochemical ion-interaction modeling of mineral solubilities

Persistent Link:
http://hdl.handle.net/10150/277912
Title:
Evaluation of errors in geochemical ion-interaction modeling of mineral solubilities
Author:
Dal Pozzo, Peter Dean, 1958-
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The accuracy of the geochemical model PHRQPITZ (Plummer et al., 1988), which uses the ion-interaction method (Pitzer, 1973) for the calculation of activity coefficients in predicting mineral solubilities, is evaluated. Furthermore, a method for estimating computational error in saturation indices for minerals in natural systems is developed. The published experimental solubility data for celestite (SrSO₄), barite (BaSO₄), fluorite (CaF₂), and calcite (CaCO₃) are evaluated and compared to calculated solubility data for the minerals in simple binary (mineral-H₂O) and ternary (mineral-NaCl-H₂O) systems. The solubility modeling error determined for minerals in these simple systems is then extrapolated to several examples of natural systems. The error in magnitude and direction gives a good estimate of the computational uncertainty in the mineral saturation indices calculated by PHRQPITZ for the natural systems. The only adjustment to PHRQPITZ is the addition of polynomial-based log K(sp) equations for the minerals being evaluated.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Hydrology.; Geochemistry.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Bassett, Randy L.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleEvaluation of errors in geochemical ion-interaction modeling of mineral solubilitiesen_US
dc.creatorDal Pozzo, Peter Dean, 1958-en_US
dc.contributor.authorDal Pozzo, Peter Dean, 1958-en_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe accuracy of the geochemical model PHRQPITZ (Plummer et al., 1988), which uses the ion-interaction method (Pitzer, 1973) for the calculation of activity coefficients in predicting mineral solubilities, is evaluated. Furthermore, a method for estimating computational error in saturation indices for minerals in natural systems is developed. The published experimental solubility data for celestite (SrSO₄), barite (BaSO₄), fluorite (CaF₂), and calcite (CaCO₃) are evaluated and compared to calculated solubility data for the minerals in simple binary (mineral-H₂O) and ternary (mineral-NaCl-H₂O) systems. The solubility modeling error determined for minerals in these simple systems is then extrapolated to several examples of natural systems. The error in magnitude and direction gives a good estimate of the computational uncertainty in the mineral saturation indices calculated by PHRQPITZ for the natural systems. The only adjustment to PHRQPITZ is the addition of polynomial-based log K(sp) equations for the minerals being evaluated.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectHydrology.en_US
dc.subjectGeochemistry.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorBassett, Randy L.en_US
dc.identifier.proquest1345365en_US
dc.identifier.bibrecord.b27003139en_US
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