TY - JOUR
T1 - Dispersive-diffusive transport of non-sorbed solute in multicomponent solutions
AU - Hu, Qinhong
AU - Brusseau, Mark L.
N1 - Funding Information:
This work is supported, in part, by the CSRS, U.S. Department of Agriculture, under project 91342146047.
PY - 1995/10
Y1 - 1995/10
N2 - 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.
AB - 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.
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U2 - 10.1016/0169-7722(95)00019-R
DO - 10.1016/0169-7722(95)00019-R
M3 - Article
AN - SCOPUS:0029412245
SN - 0169-7722
VL - 19
SP - 261
EP - 267
JO - Journal of Contaminant Hydrology
JF - Journal of Contaminant Hydrology
IS - 4
ER -