pH-dependent migration of uranium (VI) through quartz porous mediaThe retardation of uranium (VI) during the migration through quartz porous media is most influenced by adsorption. This adsorption varies significantly with small pH-value changes in the observed pH-range of 3.9 and 4.5. The entire system is complex because the formation of surface complexes affects the pH-value at high uranium (VI) concentrations.
The aim of this bachelor’ thesis is to describe the migration of uranium (VI) through columns filled with quartz. For this reason two columns will be filled with quartz powder in the laboratory, pre-equilibrated with background solution and afterwards flown through by uranium solution. To get the breakthrough curve of uranium (VI) the solution will be collected in fractions and analyzed by ICP-MS. Afterwards these results will be used as base for the modeling of the column experiments which will be performed with PhreeqC. The uranium (VI) sorption will be described with surface complexation models (SCM) whose parameters are to be determined by the laboratory experiments.
It should be tested in the progress of this bachelor’ thesis, if the surface complexation models are transferable to similar column experiments.
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Maurer, E. (2011): pH Dependent Migration of Uranium (VI) through Quartz Porous Media. Bachelor thesis, Department of Soil Science and Soil Physics, Institute of Environmental Sciences, Technische Universität Braunschweig (unpublished), 49pp.
Department of Soil Science and Soil Physics, Institute of Environmental Sciences, Technische Universität Braunschweig.