Abstract
Abstract
Immiscible fluids are ubiquitous in the subsurface, occurring naturally (air and water in the vadose zone) or because of human activity [non-aqueous phase liquids (NAPLs)]. The chapter gives an overview of the dominant physical and chemical processes that govern the fate and transport of air, water, NAPL, and NAPL components, in soil. The vertical distribution of air, water, and NAPL at equilibrium is explained. Laboratory measurements of relative permeabilities of water-wet sandstones from two studies are presented, and salient features identified. The simplest models used to describe the mass transfer of NAPL components in soil between aqueous, gaseous, and solid phases are described.
Immiscible fluids are ubiquitous in the subsurface, occurring naturally (air and water in the vadose zone) or because of human activity [non-aqueous phase liquids (NAPLs)]. The chapter gives an overview of the dominant physical and chemical processes that govern the fate and transport of air, water, NAPL, and NAPL components, in soil. The vertical distribution of air, water, and NAPL at equilibrium is explained. Laboratory measurements of relative permeabilities of water-wet sandstones from two studies are presented, and salient features identified. The simplest models used to describe the mass transfer of NAPL components in soil between aqueous, gaseous, and solid phases are described.
| Original language | English |
|---|---|
| Title of host publication | Encyclopedia of Soils in the Environment |
| Editors | Micheal J Gross, Margaret A Oliver |
| Publisher | Elsevier |
| Pages | 239-247 |
| Edition | 2nd |
| ISBN (Print) | 9780123485304 |
| DOIs | |
| Publication status | E-pub ahead of print - 26 Aug 2022 |
Keywords
- Adsorption
- Capillary Pressure
- Darcy's Law
- Dissolution
- Henry's Law
- Non-aqueous phase liquids (NAPLs)
- partitioning coefficient
- Raoult's law
- Relative permeability
- Representative elementary volume (REV)
- Saturation
- Solubility
- Sorption
- spatial averaging
- Volatilization