Dispersive-diffusive transport of non-sorbed solute in multicomponent solutions

Qinhong Hu, Mark L. Brusseau

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The composition of fuels, mixed-solvent wastes and other contaminants that find their way into the subsurface are frequently chemically complex. The dispersion and diffusion characteristics of multicomponent solutions in soil have rarely been compared to equivalent single-solute systems. The purpose of this work was to examine the diffusive and dispersive transport of single- and multi-component solutions in homogeneous porous media. The miscible displacement technique was used to investigate the transport behavior of 14C-labelled 2,4-dichlorophenoxyacetic acid (2,4-D) in two materials for which sorption of 2,4-D was minimal. Comparison of breakthrough curves collected for 2,4-D in single- and multi-component solutions shows that there is little, if any, difference in transport behavior over a wide range of pore-water velocities (70, 7, 0.66 and 0.06 cm h-1). Thus, dispersivities measured with a non-sorbing single-solute solution should be applicable to multicomponent systems.

Original languageEnglish (US)
Pages (from-to)261-267
Number of pages7
JournalJournal of Contaminant Hydrology
Volume19
Issue number4
DOIs
StatePublished - Oct 1995

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology

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