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Development and Assessment of Passive air sampler for Sampling Semi-Volatile Organic Compounds

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Title
Development and Assessment of Passive air sampler for Sampling Semi-Volatile Organic Compounds
Author
Park, Eun-Jeong
Advisor
Choi, Sung-Deuk
Keywords
Passive air sampler; Air quality; PAHs
Issue Date
2013-02
Publisher
Graduate School of UNIST
Abstract
As increasing about concerns of air quality, demand of air samplers is also increasing. Among the air pollutants, SVOCs are important pollutants because of their toxic properties. There are mainly two sampling method for collecting SVOCs. One is active air sampling and the other is passive air sampling. Most of existing passive air samplers can only collect gaseous phase. However for correct assessment of air quality, passive air samplers which collect both gaseous and particulate phase SVOCs are needed. In this study, we developed new passive air samplers for SVOCs, and we verified the sampler’s ability. Among the SVOCs, we selected 16 EPA priority PAHs as target compounds. We deployed 16 samplers and periodically recovered during 120 days. We also sampled with active air sampler for obtaining the real value of air concentrations. We analyzed the recovered samples with GC/MS. During sampling period, 8 compounds showed linearity in gaseous phase, and 14 compounds had linearity in particulate phase. There were tendency that heavier compounds were distributed in particulate phase, however lighter compounds were mainly distributed in gaseous phase. Both of samples which were obtained from actively and passively sampling were showed similar patterns. The cacluated uptake rates are 2 ng/m3 ~ 21 ng/m3 in gaseous phase PAHs, and 0.073 ng/m3 to 18 ng/ m3 in particulate phase PAHs. We identified the ability of developed passive air samplers, and this passive air sampler will be useful for assessing the air quality.
Description
Earth & Environmental Sciences
URI
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