| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Carbonaceous constituents in fine particulate matter 2.5 (PM2.5) are often associated with increased adverse health effect partly due to their potential production of Reactive Oxygen Species. Then, this study aimed to realize a photocatalytic detoxification of PM2.5 with a decomposition of carbonaceous compounds. PM2.5 samples were collected on a quartz fiber filter impregnated with titanium dioxide (TiO2) and then irradiated with UV light. Mass of PM2.5 and carbon components gradually decreased with time during the photo-induction with a significant release of carbon dioxide. This means carbonaceous constituents in PM2.5 were successfully converted to carbon dioxide. Since PM-induced oxidative stress is considered as a potential cause on health effect, oxidative potential (OP) of PM2.5 was also evaluated. The OP of PM2.5 was remarkably decreased after UV irradiation. This shows the photo-induced TiO2 potentially works for reducing oxidative stress caused by exposure to PM2.5 in air.
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