Investigation of partitioning mechanism for volatile organic compounds in a multiphase system

Autor(en): Starokozhev, Elena
Sieg, Karsten
Fries, Elke
Puettmann, Willhelm
Stichwörter: ADSORPTION; AEROSOLS; ATMOSPHERE; CHEMICALS; DIESEL SOOT; DIVERSE SET; Environmental Sciences; Environmental Sciences & Ecology; GAS; MODEL; Multiphase system; Organic vapor adsorption; Partition coefficients; Partitioning mechanism; Soot and mineral surfaces; VAPORS; WATER; Water surface
Erscheinungsdatum: 2011
Volumen: 82
Ausgabe: 10
Startseite: 1482
Seitenende: 1488
Laboratory experiments were performed to investigate the partitioning behavior of a set of diverse volatile organic compounds (VOCs). After equilibration at a temperature of 25 degrees C, the VOC concentrations were measured by headspace method in combination with gas chromatography/mass spectrometry (GC/MS). The obtained data were used to determine the partition coefficients (K(P)) of VOCs in a gas-liguid-solid system. The results have shown that the presence and nature of solid materials in the working solution control the air-water partitioning of dissolved VOCs. The air/solution partitioning of BTEX and C(9)-C(10) aldehydes was most affected in the presence of diesel soot. K(P) values decreased by a factor ranging from 1.5 for toluene to 3.0 for ethylbenzene. The addition of mineral dust in the working solution exhibited greater influence on the partitioning of short aldehydes. K(P) values decreased by a factor of 1.8. The experimental partition coefficients were used to develop a predictive model for partitioning of BTEX and n-aldehydes between air, water and solid phases. (C) 2010 Elsevier Ltd. All rights reserved.
ISSN: 00456535
DOI: 10.1016/j.chemosphere.2010.11.033

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