Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Ambient gas/particle partitioning. 1. Sorption mechanisms of apolar, polar, and ionizable organic compounds
Autor Arp, H.P.; Schwarzenbach, R.P.; Goss, K.U.;
Journal / Serie Environmental Science & Technology
Erscheinungsjahr 2008
Department AUC;
Band/Volume 42
Heft 15
Sprache englisch;
Abstract There remain several ambiguities in the literature regarding the dominating sorption mechanisms involved in gas/particle partitioning, particularly for polar and ionizable compounds. The various hypothetical mechanisms would depend differently on relative humidity (RH) and the presence of various aerosol components. Thus, in order to resolve these ambiguities, here we measured the RH-dependency of gas/particle partitioning constants, Kp, for four diverse aerosol samples and a large set of chemicals covering apolar, polar, and ionizable organic compounds. In addition, we also removed the water-soluble components from two ambient particle samples to study how their presence influences sorption behavior. The measured Kp values collectively indicate that a dual-phase sorption mechanism is occurring, in which organic compounds partition into a RH-independent water-insoluble organic matter phase and additionally into a RH-dependent mixed-aqueous phase. All Kp values could be successfully fitted to a RH-dependent dual-phase sorption model. The trends in Kp data further support findings that the sorption behavior of ambient aerosol samples is different from raw mineral surfaces and soot.
ID 747
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=747
Arp, H.P., Schwarzenbach, R.P., Goss, K.U. (2008):
Ambient gas/particle partitioning. 1. Sorption mechanisms of apolar, polar, and ionizable organic compounds
Environ. Sci. Technol. 42 (15), 5541 - 5547