Effects of room airflow on accurate determination of PUF-PAS sampling rates in the indoor environment
| Autor: | Keri C. Hornbuckle, Nicholas J Herkert |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Polyurethanes Airflow Air pollution 010501 environmental sciences Management Monitoring Policy and Law Atmospheric sciences medicine.disease_cause Sensitivity and Specificity 01 natural sciences Article Wind speed Human health chemistry.chemical_compound Anemometer medicine Calibration Humans Environmental Chemistry 0105 earth and related environmental sciences Air Movements Air Pollutants Public Health Environmental and Occupational Health Polychlorinated biphenyl Sampling (statistics) Equipment Design General Medicine Models Theoretical Polychlorinated Biphenyls chemistry Air Pollution Indoor Environmental science Environmental Monitoring |
| Zdroj: | Environmental Science: Processes & Impacts. 20:757-766 |
| ISSN: | 2050-7895 2050-7887 |
| DOI: | 10.1039/c8em00082d |
| Popis: | Accurate and precise interpretation of concentrations from polyurethane passive samplers (PUF-PAS) is important as more studies show elevated concentrations of PCBs and other semivolatile air toxics in indoor air of schools and homes. If sufficiently reliable, these samplers may be used to identify local sources and human health risks. Here we report indoor air sampling rates (R(s)) for polychlorinated biphenyl congeners (PCBs) predicted for frequently used double-dome and a half-dome PUF-PAS designs. Both our experimentally calibrated (1.10 ± 0.23 m(3) d(−1)) and modeled (1.08 ± 0.04 m(3) d(−1)) R(s) for the double-dome samplers compare well with literature reports for similar rooms. We determined that variability of wind speeds throughout the room significantly (P< 0.001) effected uptake rate. We examined this effect using computational fluid dynamic modeling and 3-D sonic anemometer measurements and found the airflow dynamics to have a significant but small impact on the precision of calculated airborne concentrations. The PUF-PAS concentration measurements were within 27% and 10% of the active sampling concentration measurements for the double-dome and half-dome designs, respectively. While the half-dome samplers produced more consistent concentration measurements, we find both designs to perform well indoors. |
| Databáze: | OpenAIRE |
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