Abstract
Soil venting is a widely used technology for removal of volatile organic compounds from the unsaturated zone. However its efficiency and length of operation is subject to many constraints. The presence of an heterogeneous porous medium is one potential cause of reduced efficiency. A laboratory column study to investigate effect of diffusion between macropore and micropore domains on tracer transport was performed. Dry glass beads and an artificial macropore were used to simulate a structured porous medium. The contribution of hydrodynamic dispersion, axial diffusion, and diffusion between macropore and micropore domains to total tracer dispersion was quantified. Diffusion between macropore and micropore domains was the major contributing process to gas dispersion at gas velocities >120 cm min-1. -from Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 133-138 |
| Number of pages | 6 |
| Journal | Unknown Journal |
| State | Published - 1995 |
ASJC Scopus subject areas
- General Environmental Science
- General Earth and Planetary Sciences