Magnetite and Manganese Dioxide Nanoparticle Amendment Impacts on Arsenic, Cadmium, and Greenhouse Gas Dynamics in Paddy Soil

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dc.contributor.advisorPolizzotto, Matthew
dc.contributor.authorKoeneke, Markus
dc.date.accessioned2021-04-27T20:45:22Z
dc.date.available2021-04-27T20:45:22Z
dc.date.issued2021-04-27
dc.description.abstractRice contamination by arsenic and cadmium is a well-documented challenge that impact billions of people globally. Our goal is to quantify the extent to which magnetite and manganese dioxide could be used as rice paddy amendments that limit As and Cd mobility and methane emissions. To do this, a suite of anaerobic and aerobic batch incubations were conducted utilizing rice-paddy soil and varying quantities and combinations of nano-magnetite and -MnO2. In the anaerobic incubation, As release decreased for all treatments, and Cd was not mobilized. In the aerobic incubations, all As concentrations in solutions were low and MnO2 decreased the amount of available Cd. This research demonstrates that nanoparticle magnetite and MnO2 can be used to reduce As and Cd mobility in flooded paddy soils, while having varying impacts on greenhouse gas emissions. There is Supplemental Information that goes in-depth on my digestion and extraction methods, data, and other figures.en_US
dc.identifier.urihttps://hdl.handle.net/1794/26191
dc.language.isoen_US
dc.publisherUniversity of Oregon
dc.rightsAll Rights Reserved.
dc.subjectArsenicen_US
dc.subjectCadmiumen_US
dc.subjectContaminationen_US
dc.subjectMethaneen_US
dc.subjectRiceen_US
dc.subjectSoilen_US
dc.titleMagnetite and Manganese Dioxide Nanoparticle Amendment Impacts on Arsenic, Cadmium, and Greenhouse Gas Dynamics in Paddy Soil
dc.typeElectronic Thesis or Dissertation
thesis.degree.disciplineDepartment of Geological Sciences
thesis.degree.grantorUniversity of Oregon
thesis.degree.levelmasters
thesis.degree.nameM.S.

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