• Title/Summary/Keyword: Air Pollution Monitoring

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Air Pollution Monitoring in Taiwan: An Application of Tethersonding in Coastal Central Taiwan

  • Cheng, Wan-Li
    • Proceedings of the Korean Environmental Health Society Conference
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    • 2005.06a
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    • pp.184-210
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    • 2005

  • The atmospheric transportation and dispersion processes of air pollutants are important issues in dealing with air pollution problems. Air pollutants originated from biological and anthropogenic activities are not only limited to the local emission sources, but could also be transported and dispersed to other regions by synoptic weather systems. Besides, the complexity of topography of central Taiwan helps accumulating air pollutants to promote high-concentration episodes. The techniques of tethersonding were applied to monitor the vertical profiles of winds, air temperatures and humidity, as well as to collect air samples, to be analyzed for pollutants ($O_3,\;NO_2$, NO and NMHC) from the ground up to 1000 m. A time period of about one week, 19 -26 October 2002, was chosen as the sampling period due to the high frequency of episode occurrence in autumn based on the past records. Associating with the analysis of weather patterns, the atmospheric characteristics over high-concentration areas can be resolved in more detail. The result of the tethersonding studies showed that weak northerly sea breeze (with thickness about 300 m) with now wind speed (about 1 to 2 m/sec) could help develop high ozone concentrations in the down-wind areas. It is also important to have a built-up aloft of precursors and ozone to develop high concentration on the previous day.

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Calculation Method for the Concentration of Persistent Organic Pollutants (POPs) Collected by Passive Air Samplers (수동대기채취기를 이용한 잔류성유기오염물질의 농도산정)

  • Choi, Sung-Deuk
    • Journal of Korean Society for Atmospheric Environment
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    • v.29 no.2
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    • pp.217-227
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    • 2013

  • Passive air samplers (PAS) have been developed since the early 2000s and widely used for the atmospheric monitoring of persistent organic pollutants (POPs). PAS are useful especially for the investigation of source-receptor relationship of POPs because they provide higher spatial resolution data. In Korea, however, only a few research groups have conducted POPs monitoring using PAS. One of the reasons for the limited application of PAS might be due to a complicated calculation method for air concentration. In this study, therefore, we introduced the principle of polyurethane foam (PUF)-PAS, which has been most widely used in the world, and provided an example of the calculation of air concentration of polycyclic aromatic hydrocarbons (PAHs). As all data tables and equations for this calculation were provided, this method can be used for the conversion of the amount of POPs (ng) in a PUF disk to air concentration ($ng/m^3$).

  • https://doi.org/10.5572/KOSAE.2013.29.2.217 인용 PDF KSCI