A technique for measuring organic vapor sorption onto water coated soils and aquifer materials is presented. The method has several advantages over other techniques such as microbalance, extraction, and headspace method. The solids used are coated with a surface layer of water and are in equilibrium with a gas phase at 100% relative humidity, simulating conditions in the unsaturated zone. Advantages of the method include the ability to measure isotherms over at least 5 orders of magnitude in organic vapor concentration, the ability to measure sorption onto very low sorbing solids, and the ability to allow an indefinite time for equilibrium to be reached.
|Original language||English (US)|
|Number of pages||11|
|Journal||ASTM Special Technical Publication|
|State||Published - 1992|
|Event||Symposium on Current Practices in Ground Water and Vadose Investigations - San Diego, CA, USA|
Duration: Jan 30 1991 → Feb 1 1991
ASJC Scopus subject areas