Sorption of a diverse set of organic vapors to diesel soot and road tunnel aerosols.
In a traffic-dominated environment sorption of organic pollutants to exhaust aerosols can strongly determine their further fate. The sorption properties of two aerosol samples representing different exhaust sources have been determined for a large set of diverse organic vapors. For pure diesel soot we could identify adsorption to elemental carbon (EC) as the dominant sorption process. We used our experimental equilibrium adsorption coefficients to derive a predictive model for adsorption on soot in line with adsorption models for other surfaces published earlier. On road tunnel aerosols, both adsorption to EC and absorption in organic matter (OM) governed the observed sorption and the data could not be further evaluated in terms of a specific sorption mechanism.
Roth
Christine M
CM
Swiss Federal Institute for Environmental Science and Technology (EAWAG), Ueberlandstrasse 133, Postfach 611, CH-8600 Duebendorf Switzerland. christine.roth@eawag.ch
Goss
Kai-Uwe
KU
Schwarzenbach
René P
RP
D000327:Adsorption; D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D002244:Carbon / Q000032:analysis*; D002849:Chromatography, Gas; D004784:Environmental Monitoring; D007700:Kinetics; D008956:Models, Chemical; D009930:Organic Chemicals / Q000032:analysis*; D013499:Surface Properties; D001335:Vehicle Emissions / Q000032:analysis*; D014835:Volatilization
D000336:Aerosols; D000393:Air Pollutants; D009930:Organic Chemicals; D001335:Vehicle Emissions; D002244:Carbon