2020 年 35 巻 2 号 p. 118-128
The study evaluated the possibility of using tape from air monitoring station for polycyclic aromatic hydrocarbons (PAHs) data. Thermal desorption/gas chromatography-mass spectrometry (TD/GC-MS) was utilized to analyze 12 PAHs in PM2.5 samples, collected on the glass fiber filter tape by a continuous PM2.5 mass concentration monitor operated in Ho Chi Minh City, Vietnam during Vietnamese New Year (VNY) holidays. The analysis of PAHs was performed 4 years after the sample collection. The results showed that the PAH data can be acquired from air monitoring tape, and the estimated total PAHs can be assessed. This is the first study about the change in air quality due to the cultural activities in Vietnam. The PAH concentrations were dependent intensely on traffic patterns, with the decrease of PM2.5 and PAH concentrations throughout holidays. In addition, wood/coal combustion related to the firework, domestic combustion, and burning incense/candle were important sources during holidays. The value of the IcdP/(IcdP＋BghiP) ratio was 0.72 in VNY, which was similar to that from cooking, candle, and incense burning. The average incremental lifetime cancer risks were 9.5 for adults and 1.8 for children per 100,000 people during sampling time, which were within the acceptable risk of 10-6–10-4.
