naa a22 4500 510749364 CHVBK 20180411083058.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1691-1 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1691-1 Gas-Solute Dispersivity Ratio in Granular Porous Media as Related to Particle Size Distribution and Particle Shape [Elektronische Daten] [Lorenzo Pugliese, Tjalfe Poulsen, Salvatore Straface] Measurements of solute dispersion in porous media is generally much more time consuming than gas dispersion measurements performed under equivalent conditions. Significant time savings may therefore, be achieved if solute dispersion coefficients can be estimated based on measured gas dispersion data. This paper evaluates the possibility for estimating solute dispersion based on gas dispersion measurements. Breakthrough measurements were carried out at different fluid velocities (covering the same range in Reynolds number), using O2 and NaCl as gas and solute tracers, respectively. Three different, granular porous materials were used: (1) crushed granite (very angular particles), (2) gravel (particles of intermediate roundness) and (3) Leca® (almost spherical particles). For each material, 21 different particle size fractions were used. Gas and solute dispersion coefficients were determined by fitting the advection-dispersion equation to the measured breakthrough curves and in turn used to calculate gas and solute dispersivities as a function of mean particle size (D m) and particle size range (R) for the 63 particle size fractions considered. The results show that solute and gas dispersivities are related and that their ratio depends on both R and D m. Based on these observations a simple model for predicting the dispersivity ratio from D m and R, was proposed. Springer Science+Business Media Dordrecht, 2013 Dispersivity nationallicence Gas measurements nationallicence Solute measurements nationallicence Particle shape nationallicence Particle size range nationallicence Mean particle diameter nationallicence Pugliese Lorenzo Department of Chemistry and Biotechnology, Aalborg University, Sohngaardsholmsvej 57, 9000, Aalborg, Denmark aut Poulsen Tjalfe Department of Civil Engineering, Xi'an Jiaotong, Liverpool University, 111 Ren Ai Road, 215123, Suzhou, Jiangsu, China aut Straface Salvatore Department of Ingegneria per l'Ambiente, il Territorio ed Ingegneria Chimica, Università della Calabria, Via P. Bucci 42B, 87036, Arcavacata di Rende, Italy aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1691-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1691-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pugliese Lorenzo Department of Chemistry and Biotechnology, Aalborg University, Sohngaardsholmsvej 57, 9000, Aalborg, Denmark aut NATIONALLICENCE 700 1- Poulsen Tjalfe Department of Civil Engineering, Xi'an Jiaotong, Liverpool University, 111 Ren Ai Road, 215123, Suzhou, Jiangsu, China aut NATIONALLICENCE 700 1- Straface Salvatore Department of Ingegneria per l'Ambiente, il Territorio ed Ingegneria Chimica, Università della Calabria, Via P. Bucci 42B, 87036, Arcavacata di Rende, Italy aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer