Relating non-equilibrium solute transport and porous media physical characteristics

Lorenzo Pugliese*, Salvatore Straface, Benito Mendoza Trujillo, Tjalfe G. Poulsen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Breakthrough data for solute tracer transport at different velocities, covering a wide range of particle sizes and particle shapes corresponding to 324 breakthrough curves, were used in this study. Analysis was carried out for three granular porous media: crushed granite, gravel, and Leca® (a commercial insulation material). Mobile-immobile phase (MIM) solute transport parameters (dispersivity, mass transfer, and mobile (active) porosity) for non-equilibrium mass transport were determined for each breakthrough curve by fitting a MIM solute transport model to the breakthrough data. The resulting set of solute transport parameters was correlated with porous medium physical properties (particle size distribution and particle shape) to establish a set of simple expressions for estimating the MIM solute transport parameters. Linear expressions for predicting the solute dispersivity, mass transfer, and mobile phase porosity from porous medium particle size distribution (mean particle diameter and width of particle size distribution) and particle shape were developed based on regression analysis. A partial validation of these expressions indicated that the developed expressions are able to accurately predict solute transport parameters from porous medium physical properties.

Original languageEnglish
Article number59
JournalWater, Air, and Soil Pollution
Volume226
Issue number3
DOIs
StatePublished - Mar 2015
Externally publishedYes

Keywords

  • Mass transfer coefficient
  • Non-equilibrium solute transport
  • Particle shape
  • Particle size distribution
  • Solute breakthrough tailing
  • Solute dispersivity

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