Source/Sink Characteristics of SVOCs

A rapid micro chamber method to measure SVOC emission and transport model parameters

“…44 Field campaigns and chamber experiments have been conducted to determine those parameters. 45 However, eld studies, while having the advantages of obtaining parameters in a real room, are labor-intensive and usually result in high uncertainty in estimated parameters due to poorly constrained environmental conditions (e.g., temperature, air change rate, and the number of sources). 46,47 Additionally, a large number of indoor surfaces in real indoor environments may serve as strong sinks for SVOCs, thus substantially increasing the time needed to reach steady state.…”

“…Therefore, in this study, we used two types of chambers: a macro chamber, which had a more traditional design in that it downscaled the dimensions of a typical room to a smaller size with roughly the same surface-to-volume ratio as a room, and a micro chamber, which minimized the sink-to-source surface area ratio to shorten the time until steady state has been reached. The micro chamber is the result of a process of developing chambers aimed at shorter testing times, 32,33,45 which included sandwich-like chambers and material-airmaterial (M-A-M) chambers, and it is also closely related to the needle trap device microemission cell (NTP-mEC) developed by Xu et al (2019). 51 The specic objectives of this work are to (1) examine whether the two chambers with different sink-tosource surface area ratios can yield comparable results and (2) illustrate the application of the results from the chamber experiments by estimating the concentrations in indoor compartments and human exposure using the updated DustEx webtool.…”