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- W2036431518 abstract "Solute sorption in aquifer systems is significantly affected by processes which occur at the scale of individual solid particles, such that proper physical characterization of the solids is requisite to fully understanding solute transport. Methods for characterizing grains of sandy aquifer material with respect to physical properties relevant to sorption are described and assessed. The properties include particle density, porosity, pore size distribution, specific surface area, and carbon content. Because intraparticle porosity, specific surface area, and organic carbon are quite low for sandy materials, methods routinely used for characterizing solids must be carefully evaluated and adapted for use on aquifer solids. The methods considered here were applied to aquifer material acquired at a site in Borden, Ontario, where numerous transport studies have been conducted. Results with well-characterized model solids are also included, as appropriate, for method evaluation. Results with the Borden solids are reported for eight size fractions and for the homogenized bulk material. Mineralogical characterization of the fractions served as an indispensable complement to the physical characterization methods. Pulverization of samples in a shatterbox was shown to be useful for homogenizing samples and reducing variability. We found a modified dry combustion method to be superior to wet oxidation for determining organic carbon. Surface area measurements were indicative of significant internal porosity, and pore size distributions obtained by gas adsorption and mercury porosimetry were found to be consistent and complementary. For the Borden material—which has an immeasurably low clay mineral content—specific surface area, intraparticle porosity, and organic carbon content were all greatest in the larger size fractions." @default.
- W2036431518 created "2016-06-24" @default.
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- W2036431518 date "1990-03-01" @default.
- W2036431518 modified "2023-10-17" @default.
- W2036431518 title "Characterization of a sandy aquifer material at the grain scale" @default.
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- W2036431518 doi "https://doi.org/10.1016/0169-7722(90)90040-n" @default.
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