Influence of desorption on the indoor concentration of toxic gases

Toxic gas clouds: Effects and implications of dry deposition on concentration

“…Without these processes, the event would have been far more tragic than it was. Dry deposition has also been shown to be capable of significantly reducing the indoor concentration of toxic gases released outdoors [15][16] especially at low ventilation rates.…”

Sheltering in buildings from large-scale outdoor releases

“…Sorbed chemicals can also slowly desorb from surfaces. Room-scale experiments indicate that the sorption loss rate of NH 3 , Cl 2 , SO 2 , sarin, and VX are equivalent to having an additional fresh air supply of 1 ACH [13,14,15], which is significantly more rapid compared to the typical air change rate of 0.3 h -1 . …”

Solvent Extraction of Chemical Attribution Signature Compounds from Painted Wall Board: Final Report

“…Paints are widely used in residential and commercial buildings, and the surface areas covered by this kind of coating are very large and thus very likely to be exposed to a building-related event. Moreover, the painted layer and the substrate supporting the paint can behave as an ab(d)sorbent material (Karlsson 1996, Munro 1999. As a result, PWB provides an excellent reservoir for CAS collection post event.…”

“…These key components may be due to unreacted reagents, degradation products, side-reaction products, or [21] utilizing a single sink model to estimate sorption and desorption rates of sarin on surfaces. Blewett and Arca [22] reported experiments in which a small cottage was exposed to exterior concentrations of 5-7 g m -3 sarin over a 1 hour period in a larger test chamber.…”