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Full-Text Articles in Soil Science
Chemical Characterization And Anion Exchange Properties Of A West Tennessee Loess Soil, Jessica Lynn Ottinger
Chemical Characterization And Anion Exchange Properties Of A West Tennessee Loess Soil, Jessica Lynn Ottinger
Masters Theses
Loess soils of west Tennessee may potentially contain large amounts of subsoil metal oxides (Fe, Al, and Mn) which may retain and restrict the movement of conservative anions, such as nitrate (NO3). The potential utilization of large quantities of flue gas desulfurization (FGD) gypsum on these soils may displace subsoil NO3, releasing it to adversely impact sensitive aquatic environments. This research examines the depth distribution of Fe-, Al, and Mn-oxyhydroxides, pH, particle size distribution, and of the cation and anion exchange capacity and exchange phase composition to identify depths that have the greatest potential for anion …
Adsorption Of Antimony By Birnessite And The Impact Of Antimony On The Electrostatic Surface Properties Of Variable-Charge Soil Minerals, Kalyn Alaine Vergeer
Adsorption Of Antimony By Birnessite And The Impact Of Antimony On The Electrostatic Surface Properties Of Variable-Charge Soil Minerals, Kalyn Alaine Vergeer
Masters Theses
Antimony (Sb) is a toxin that can be found in high concentrations in the soil due to anthropogenic sources. Antimony exists in soil as Sb(V) in the monovalent antimonate hydroxyanion. The adsorption mechanisms of Sb(V) are not well-characterized. The objective of this study was to further elucidate Sb(V) adsorption mechanisms by examining the impact of adsorption on surface charging characteristics of gibbsite, goethite, birnessite, and kaolinite. Also examined was Sb(V), SO4 [sulfate], and PO4 [phosphate] adsorption by birnessite. Electrophoretic mobility and potentiometric titrations were employed to examine the ζ-potential [zeta-potential] and net proton surface charge density as a …