| Project/Area Number |
04650580
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
資源開発工学
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| Research Institution | IWATE UNIVERSITY |
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Principal Investigator |
SEKIMOTO Yoshinori IWATE University, Faculty of Engineering, Department of Civil and Environmental Engineering Professor, 工学部, 教授 (70003837)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Benzo (a) Pyrene / Suspended Particulate Matter / Mine Air / Mine Vehicular machinery / Diesel Exhaust / 発がん物質 / 鉱山保安 |
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| Research Abstract |
The air of mine adopting trackless mining system was polluted with exhaust gas from mobile jumbo, load hole dump and supporting vehicles equipped with diesel engines. Diesel exhaust particulates contained a large amount of soluble organic fraction. Some of which was considered to be carcinogenic, such as polyciclic aromatic carbons. Benzo (a) Pyrene (B(a)P) concentrations were much lower than those of blasting fume, but high B(a)P concentrations were detected. Dust concentrations of working time of load hole dump were detected over a range from 3.02 to 168 ng/m^3. High B(a)P concentrations were especially detected at the starting time of diesel engine. B(a)P concentrations decreased with time, but those were higher than 10 ng/m^3 at 60 minutes later from stating time of diesel engine. These value were about 10 times higher than the air at 60 minutes later after blasting. B(a)P contents of dust were determined over a range from 3.10 to 97.1 mug/g. These values were about 20 times higher than those of blasting fume. Diesel exhaust particulates contained a large amount of B(a)P.It was considered that diesel exhaust particulates were produced through pyrolysis of the fuel during local incomplete combustion in the cylinder. Although diesel-powered engine is superior in fuel economy, it emits more particulate matter than gasoline-fueled engine and emission of B(a)P is also becoming a serious mine environmental problem.Water scrubber tank equiped with exhaust pipe is effective to decrease the generation of B(a)P.
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