Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Volume 16, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/ijerph16183446
Keywords
KPASS; cooler; ozone; sulfur dioxide; carbon monoxide; water removal device; ambient air pollutants
Funding
- R&D Center for Green Patrol Technologies through the R&D for Global Top Environmental Technologies - Ministry of Environment(MOE), Republic of Korea [1485016147]
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Water vapor is a pivotal obstacle when measuring ambient air pollutants. The effects of water vapor removal devices which are called KPASS (Key-compound PASSer) and Cooler. On the measurement of O-3, SO2, and CO at ambient levels were investigated. Concentrations of O-3, SO2, and CO were 100 ppb, 150 ppb, and 25 ppm, respectively. The amount of water vapor varied at different relative humidity levels of 30%, 50%, and 80% when the temperature was 25 degrees C and the pressure was 1 atm. Water vapor removal efficiencies and recovery rates of target gases were also determined. The KPASS showed a better performance than the Cooler device, removing 93.6% of water vapor and the Cooler removing 59.2%. In terms of recovery, the KPASS showed a better recovery of target gases than the Cooler. Consequently, it is suggested that the KPASS should be an alternative way to remove water vapor when measuring O-3, SO2, and CO.
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