The Chemical and kinetic mechanism for leaching of chrysocolla by sulfuric acid

Persistent Link:
http://hdl.handle.net/10150/192074
Title:
The Chemical and kinetic mechanism for leaching of chrysocolla by sulfuric acid
Author:
Jiang, Mofen.
Issue Date:
1992
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:
Batch experiments were conducted to determine the dissolution characteristics of chrysocolla using a computer controlled p11-Stat titration system. Dissolution can be described by the diffusion controlled shrinking core model with a 1:2 ratio of copper to proton; rate was inversely proportional to pH and ionic strength. Scanning electron microscope was used to investigate the possibility of secondary mineral precipitation. Secondary precipitation was not sufficient to affect the dissolution rate, however, the shrinking core model did indicate the formation of a residual silica layer. Chemical analysis of aqueous samples collected from the solution mining operation at the San Manuel Copper Mine indicated that the major ions were Al, Fe, Cu, Si0₂ and SO₄. Analysis of the saturation index illustrated the potential for formation of secondary surface coatings which may impact dissolution in the field. Geochemical computer models, PHRQPITZ, PHREEQE, SOLMINEQ, and WATEQ4F were selected to model both experimental and field results.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Chrysocolla.; Copper ores -- Metallurgy.; Leaching.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bassett. Randy L.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe Chemical and kinetic mechanism for leaching of chrysocolla by sulfuric aciden_US
dc.creatorJiang, Mofen.en_US
dc.contributor.authorJiang, Mofen.en_US
dc.date.issued1992en_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.abstractBatch experiments were conducted to determine the dissolution characteristics of chrysocolla using a computer controlled p11-Stat titration system. Dissolution can be described by the diffusion controlled shrinking core model with a 1:2 ratio of copper to proton; rate was inversely proportional to pH and ionic strength. Scanning electron microscope was used to investigate the possibility of secondary mineral precipitation. Secondary precipitation was not sufficient to affect the dissolution rate, however, the shrinking core model did indicate the formation of a residual silica layer. Chemical analysis of aqueous samples collected from the solution mining operation at the San Manuel Copper Mine indicated that the major ions were Al, Fe, Cu, Si0₂ and SO₄. Analysis of the saturation index illustrated the potential for formation of secondary surface coatings which may impact dissolution in the field. Geochemical computer models, PHRQPITZ, PHREEQE, SOLMINEQ, and WATEQ4F were selected to model both experimental and field results.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshChrysocolla.en_US
dc.subject.lcshCopper ores -- Metallurgy.en_US
dc.subject.lcshLeaching.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairBassett. Randy L.en_US
dc.contributor.committeememberHiskey, Brenten_US
dc.contributor.committeememberKreitler, Charles W.en_US
dc.identifier.oclc228032550en_US
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