Transport of volatile chlorinated hydrocarbons in unsaturated aggregated media

Gimmi, Thomas; Fluehler, Hannes; Studer, Björn; Rasmuson, Anders (1993). Transport of volatile chlorinated hydrocarbons in unsaturated aggregated media. Water, Air, & Soil Pollution, 68(1-2), pp. 291-305. Springer 10.1007/BF00479409

Preview

Text Gimmi1993_Article_TransportOfVolatileChlorinated.pdf - Published Version Available under License Publisher holds Copyright. Download (872kB) | Preview

Transport of volatile hydrocarbons in soils is largely controlled by interactions of vapours with the liquid and solid phase. Sorption on solids of gaseous or dissolved comPounds may be important. Since the contact time between a chemical and a specific sorption site can be rather short, kinetic or mass-transfer resistance effects may be relevant. An existing mathematical model describing advection and diffusion in the gas phase and diffusional transport from the gaseous phase into an intra-aggregate water phase is modified to include linear kinetic sorption on ps-solid and water-solid interfaces. The model accounts for kinetic mass transfer between all three phases in a soil. The solution of the Laplace-transformed equations is inverted numerically. We performed transient column experiments with 1,1,2-Trichloroethane, Trichloroethylene, and Tetrachloroethylene using air-dry solid and water-saturated porous glass beads. The breakthrough curves were calculated based on independently estimated parameters. The model calculations agree well with experimental data. The different transport behaviour of the three compounds in our system primarily depends on Henry's constants.

Interest & Impact

Downloads

21 since deposited on 11 Sep 2014
21 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item