Volatilization of mercury from soils in response to simulated precipitation

dc.contributor.advisorVan Heyst, Bill
dc.contributor.authorSong, Xiaoxi
dc.date.accessioned2021-05-28T14:47:41Z
dc.date.available2021-05-28T14:47:41Z
dc.date.copyright2004
dc.degree.departmentSchool of Engineeringen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractIncreases in mercury volatilization from naturally enriched soils due to precipitation events have been observed in the field, leading to the need for further research on the exact mechanisms responsible for the increase in the observed fluxes. In this research, the effects of precipitation on fluxes were simulated in a controlled laboratory experiment using a dynamic flux chamber system coupled with a Tekran® 2537A Mercury Vapour Analyzer. The experimental results indicate a sharp and rapid spike in the mercury flux, during and immediately following the precipitation event, which is a result of the physical displacement of the Hg-containing interstitial soil air by infiltrating rain water. The enhanced mercury emission flux after a precipitation event is dependent on both the quantity of infiltrating rain and the soil moisture content prior to the rain event, pointing to the mobilization of Hg (II) from soil particle to soil solution phase as the probable controlling process. The critical soil moisture range for surface soil moisture before a precipitation event is between 13% and 15%, above which enhanced mercury emissions do not occur.en_US
dc.identifier.urihttps://hdl.handle.net/10214/25817
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectmercury volatilizationen_US
dc.subjectnaturally enriched soilsen_US
dc.subjectprecipitation eventsen_US
dc.subjectmercury emission fluxen_US
dc.subjectmobilizationen_US
dc.titleVolatilization of mercury from soils in response to simulated precipitationen_US
dc.typeThesisen_US

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