Persistent Link:
http://hdl.handle.net/10150/193339
Title:
Mobilization of Lead and Zinc in Acid Sulfate Mine Tailings
Author:
Vazquez-Ortega, Angelica
Issue Date:
2008
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:
In this thesis, column experiments were conducted in order to determine the effect of irrigation with local groundwater on mobilization of lead and zinc in 50 years old sulfate-acid mine tailings. In addition, the influence of soluble oxalic acid, a common rhizosphere organic acid, was assessed by varying its concentration across an environmentally relevant range. In general, metal contaminant dissolution was not affected by the presence of oxalic acid. In both tailings, Zn mobilization was higher than Pb suggesting the presence of more kinetically labile Zn phases, regardless of the treatment used. Lead mobilization was also low because effluent solutions were near to equilibrium conditions with respect to gypsum, preventing Pb dissolution from Pb-sulfate minerals. Geochemical modeling also indicated that lead release was controlled by anglesite and plumbojarosite dissolution. Zinc release appears to be controlled by Zn-talc and goslarite.
Type:
text; Electronic Thesis
Keywords:
mine tailings; heavy metals; lead; zinc; sulfate minerals
Degree Name:
MS
Degree Level:
masters
Degree Program:
Soil, Water & Environmental Science; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Chorover, Jon
Committee Chair:
Chorover, Jon

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleMobilization of Lead and Zinc in Acid Sulfate Mine Tailingsen_US
dc.creatorVazquez-Ortega, Angelicaen_US
dc.contributor.authorVazquez-Ortega, Angelicaen_US
dc.date.issued2008en_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.abstractIn this thesis, column experiments were conducted in order to determine the effect of irrigation with local groundwater on mobilization of lead and zinc in 50 years old sulfate-acid mine tailings. In addition, the influence of soluble oxalic acid, a common rhizosphere organic acid, was assessed by varying its concentration across an environmentally relevant range. In general, metal contaminant dissolution was not affected by the presence of oxalic acid. In both tailings, Zn mobilization was higher than Pb suggesting the presence of more kinetically labile Zn phases, regardless of the treatment used. Lead mobilization was also low because effluent solutions were near to equilibrium conditions with respect to gypsum, preventing Pb dissolution from Pb-sulfate minerals. Geochemical modeling also indicated that lead release was controlled by anglesite and plumbojarosite dissolution. Zinc release appears to be controlled by Zn-talc and goslarite.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectmine tailingsen_US
dc.subjectheavy metalsen_US
dc.subjectleaden_US
dc.subjectzincen_US
dc.subjectsulfate mineralsen_US
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineSoil, Water & Environmental Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorChorover, Jonen_US
dc.contributor.chairChorover, Jonen_US
dc.contributor.committeememberMaier, Rainaen_US
dc.contributor.committeememberRasmussen, Craigen_US
dc.identifier.proquest2600en_US
dc.identifier.oclc659748528en_US
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