A regression model for mineral solubility as a function of ionic strength and temperature

Persistent Link:
http://hdl.handle.net/10150/278069
Title:
A regression model for mineral solubility as a function of ionic strength and temperature
Author:
Shaikh, Muhammad Javed, 1955-
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:
An algorithm is developed to predict the solubility of gypsum and anhydrite as a function of ionic strength and temperature. Critically evaluated experimental data were used for fitting of an eight parameter equation using multiple regression analysis. The model was also used to fit the simulated solubility data for anhydrite and gypsum, generated by program PHRQPITZ. The correlation between the observed and fitted values was very high. The errors between experimental model and PHRQPITZ simulation were computed with the variation of temperature and ionic strength. A significant improvement in the errors was noticed by replacing the values of equilibrium constants in PHRQPITZ. Modifications have been made in the FORTRAN code of PHRQPITZ to convert the program for VAX and PC computers. Additional modifications were made in PHRQPITZ to convert the index numbering of elements/species compatible to another geochemical model PHREEQE. (Abstract shortened with permission of author.)
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Hydrology.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Bassett, Randy

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleA regression model for mineral solubility as a function of ionic strength and temperatureen_US
dc.creatorShaikh, Muhammad Javed, 1955-en_US
dc.contributor.authorShaikh, Muhammad Javed, 1955-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.abstractAn algorithm is developed to predict the solubility of gypsum and anhydrite as a function of ionic strength and temperature. Critically evaluated experimental data were used for fitting of an eight parameter equation using multiple regression analysis. The model was also used to fit the simulated solubility data for anhydrite and gypsum, generated by program PHRQPITZ. The correlation between the observed and fitted values was very high. The errors between experimental model and PHRQPITZ simulation were computed with the variation of temperature and ionic strength. A significant improvement in the errors was noticed by replacing the values of equilibrium constants in PHRQPITZ. Modifications have been made in the FORTRAN code of PHRQPITZ to convert the program for VAX and PC computers. Additional modifications were made in PHRQPITZ to convert the index numbering of elements/species compatible to another geochemical model PHREEQE. (Abstract shortened with permission of author.)en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectHydrology.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, Randyen_US
dc.identifier.proquest1346747en_US
dc.identifier.bibrecord.b27280524en_US
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