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 (690Kb)
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| Shiro Hatakeyama | |
| Director | |
| Chemical Reaction Section, Atmospheric Environment Division | |
| National Institute for Environmental Studies | |
| Environment Agency | |
| 16-2 Onogawa, Tsukuba , Ibaraki 305-0053, Japan | |
| Tel: +81-298-50-2502 Fax: +81-298-50-2579 | |
| E-mail: hatashir@nies.go.jp | |
| EF Fellow Name: Xuhui DONG |
5,995,000 Yen
(FY 1999; 1,995,000 Yen)
In this study, the low and stable concentration of the hydrogen fluoride gas was got by using porous polytetetrafluoroethylene (PPTFE) tube, which HF gas generated from reaction of NaF and H2SO4 solution can diffuse through the membrane. Then, it is considered that the simple sampling (passive sampler and detection tube) could be used in measuring the concentration of the air pollutants emitted from the raw coal and the bio-briquette combustion instead of alkaline solution since the results of two methods were approximately agreement. And, the aldehydes emitted from the raw coal and the bio-briquette combustion were collected by cartridge sampler and their concentrations were analyzed by HPLC-UV.
The reduction efficiencies of air pollutants by bio-briquetting and the evaluation methods for indoor and outdoor pollution were investigated. Further, the personal exposure amounts of NO2 and SO2 were estimated based on the concentration of air pollutants determined at the real environment in Chongqing of China. Concentration of SO2 in indoor air amounted to 13 times of annual average of Chongqing outdoor-air when the raw coal was burned, but they dropped to 1/2〜1/3 of raw coal combustion in case using the bio-briquette. It is known that the reduction efficiencies of air pollutants by bio-briquetting were high based on the comparison of the human exposure amounts. The human exposure amounts of SO2 and NO2 were 15.66 mg/day and 0.23 mg/day for the bio-briquette combustion, 37.01 mg/day and 0.34 mg/day for the raw coal combustion, respectively.
coal combustion, bio-briquette, personal exposure amounts, aldehydes