|ID = 2
|Title = Documentation
of Field and Laboratory Emission Cell "FLEC": Identification of Emission
Processes from Carpet, Linoleum, Paint, and Sealant by Modeling
|Abstract = Time
versus concentration data of selected volatile organic compounds (VOCs)
emitted from four pre-conditioned building materials were measured in the
Field and Laboratory Emission Cell (FLEC) at three air exchange rates,
171, 342, 684 h-1, respectively, during a period of 240 hours. The materials
were a carpet, a linoleum, a water-borne paint, and a sealant. Modeling
of the time versus concentration data for two air exchange rates showed
that the emission of VOCs from the carpet were best described with a diffusion
model in which the diffusion coefficient depends on the concentration gradient
for all data (exponential diffusion model), while a reduced data set eliminating
initial events also could be described with a first order decay incorporating
a sink effect. The paint emission data of the polar semi-VOC, Texanol,
could be described with a first order decay model incorporating a sink
effect for all three air exchange rates. The emission rate constant doubled
by doubling the air exchange rate. The emission data for VOCs from the
sealant were best described for all three air exchange rates by the exponential
diffusion model. The best model correlation fit was obtained for hexane,
but satisfactory results were also obtained for 2-ethylhexanol and dimethyloctanols.
The decay results of linoleum did not allow for modeling leading to the
conclusion that an internal concentration gradient had not yet been established
under the experimental conditions.
|Location = Indoor
Air 1993, 3:291-297
|Reference type = Journal
|Author = Wolkoff,P.
Clausen,P.A. Nielsen,P.A. Gunnarsen,L.
|Company or Institute