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Full-Text Articles in Earth Sciences
Wetland Uranium Transport Via Iron-Organic Matter Flocs And Hyporheic Exchange, Connor J. Parker
Wetland Uranium Transport Via Iron-Organic Matter Flocs And Hyporheic Exchange, Connor J. Parker
All Dissertations
Uranium (U) released from the M-Area at the Department of Energy Savannah River Site into Tims Branch, a seasonal wetland and braided stream system, is estimated to be 43,500 kg between 1965 and 1984. The motivation for this work is the uranium’s persistence in the wetland for decades, where it is estimated that 80% of the U currently remains in the Tims Branch wetland. U has begun to incorporate into wetland iron (Fe) and carbon cycles, associating with local Fe mineralogy and deposits of rich wetland organic matter (OM). The objective of this work is to characterize the chemical phases …
Biogeochemical Processes In Hydrosoil Of A Pilot-Scale Constructed Wetland Treatment System Designed For Treatment Of Metals, Kristen Jurinko
Biogeochemical Processes In Hydrosoil Of A Pilot-Scale Constructed Wetland Treatment System Designed For Treatment Of Metals, Kristen Jurinko
All Theses
Environmental conditions, metal (Cd, Cu, Ni, and Zn) distribution, and metal fractionation in hydrosoil (sediment and overlying organic detritus) of a free water surface pilot-scale constructed wetland treatment system (CWTS) were investigated to determine treatment processes. Chemical and mineralogical analyses were performed on organic detritus samples and sediment cores collected from two cells planted with Schoenoplectus californicus and two cells planted with Typha angustifolia. T-tests indicate that cells planted with S. californicus and those planted with T. angustifolia were equally effective in promoting conditions in the detritus favorable for sorption of metals and complexation with acid-volatile sulfide (AVS). For the …