Mobilization of Lead and Zinc in Acid Sulfate Mine Tailings
| dc.contributor.advisor | Chorover, Jon | en_US |
| dc.contributor.author | Vazquez-Ortega, Angelica | |
| dc.creator | Vazquez-Ortega, Angelica | en_US |
| dc.date.accessioned | 2011-12-05T14:14:07Z | |
| dc.date.available | 2011-12-05T14:14:07Z | |
| dc.date.issued | 2008 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10150/193339 | |
| dc.description.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. | |
| dc.language.iso | EN | en_US |
| dc.publisher | The University of Arizona. | en_US |
| dc.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. | en_US |
| dc.subject | mine tailings | en_US |
| dc.subject | heavy metals | en_US |
| dc.subject | lead | en_US |
| dc.subject | zinc | en_US |
| dc.subject | sulfate minerals | en_US |
| dc.title | Mobilization of Lead and Zinc in Acid Sulfate Mine Tailings | en_US |
| dc.type | text | en_US |
| dc.type | Electronic Thesis | en_US |
| dc.contributor.chair | Chorover, Jon | en_US |
| dc.identifier.oclc | 659748528 | en_US |
| thesis.degree.grantor | University of Arizona | en_US |
| thesis.degree.level | masters | en_US |
| dc.contributor.committeemember | Maier, Raina | en_US |
| dc.contributor.committeemember | Rasmussen, Craig | en_US |
| dc.identifier.proquest | 2600 | en_US |
| thesis.degree.discipline | Soil, Water and Environmental Science | en_US |
| thesis.degree.discipline | Graduate College | en_US |
| thesis.degree.name | MS | en_US |
| refterms.dateFOA | 2018-06-29T19:05:16Z | |
| html.description.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. |
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