| Project/Area Number |
17404001
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kanazawa University |
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Principal Investigator |
FURUUCHI Masami Kanazawa University, Graduate School of Natural Science and Technology, Professor (70165463)
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| Co-Investigator(Kenkyū-buntansha) |
OTANI Yoshio Kanazawa University, Graduate School of Natural Science and Technology, Professor (10152175)
TSUKAWAKI Shinji Kanazawa University, Institute of Nature and Environmental Technology, Associate Professor (00222133)
HATA Mitsuhiko Kanazawa University, Graduate School of Natural Science and Technology, Assistant Professor (00334756)
坂野 健夫 金沢大学, 自然科学研究科, 研究員 (80397182)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥11,950,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥750,000)
Fiscal Year 2007: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2006: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2005: ¥6,200,000 (Direct Cost: ¥6,200,000)
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| Keywords | Smoked Rubber Sheet / Air pollutants / Working environment / Pollutants transportation / Long term environmental change / Total pollutants emission / Air pollution control / Environmental policy / 作業環境 / 輸送 / 長期的環境変動 / トータルエミッション / 発生源対策 |
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| Research Abstract |
Emissions of air pollutants from all possible sources during RSS (Ribbed Smoke Sheet) production, transportation inside Thailand, or, transportation of tapped latex with motorcycles, tracks to RSS storage centers and ports, shipping to Japan and rubber tire production in Japan were evaluated based information from related data including LCA data base and the measurement of pollutants on emission sources, showing more than 30% of PAHs is emitted inside Thailand, mostly from the drying process. Clear relations between RSS production amount and ambient PAHs concentration were found to exist: maximum PAHs concentration was observed at maximum RSS production during rainy season, which is about 7-8 times larger than a back ground value. The wind direction was found to have an importance on PAHs concentration: the lowest concentration in Hat Yai for the largest RSS production amount from January to February when the northeast or east wind from Gulf of Thailand is predominant. A clear dependen
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cy of an index for biomass burning was observed in relation to RSS production except January and February. The irradiation of soft X-rays can degrade effectively PAHs in smoke particles from rubber wood burning, where more PAHs was effectively degraded in finer fraction of particles. An electrostatic precipitator was tested and proven to improve the quality of products by reducing smoke particles. Most concern of works was confirmed to be in smoke through interview. Concentrations of gaseous pollutants such as NO_2 and SO_2 in the workplace of RSS factory were rather low while PAHs concentration is quite high, where more than a few hundred ng/m^3 of PAHs were observed. This may be mostly from a smoke leakage from drying room. 1-OHP (Hydorxine pyrene) increased with PM concentration while a tendency between Pyrene and 1-OHP concentrations was not clear. Sediment samples were collected from a lake in Trang province, which provide information on a history of environmental change after RSS production was started 100 years ago. Less
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