標題: Use of two different acidic aerosol samplers to measure acidic aerosols in Hsinchu, Taiwan
作者: Tsai, CJ
Perng, SB
Chiou, SF
環境工程研究所
Institute of Environmental Engineering
公開日期: 1-十二月-2000
摘要: Acidic aerosol concentrations measured by an annular denuder system (ADS) and a honeycomb denuder system (HDS) in Hsinchu, Taiwan, were compared. Aerosols were also sampled by a MOUDI (micro-orifice uniform deposit impactor) and analyzed by an ion chromatograph to determine the size distributions of different species. Using the measured aerosol size distribution, theoretical analysis showed that positive HNO3 artifact due to volatilization of NH4NO3 is generally negligible for both samplers. Comparing two different denuder samplers, the average concentration of HNO3 measured by the ADS was found to be lower than that measured by the HDS, while the difference between the two samplers for the average concentration of other species was found to be within +/-15%. A possible cause of the difference in HNO3 concentrations is due to a greater loss of HNO3 in the cyclone used by the ADS than in the impactor used by the HDS. The study also showed incomplete absorption of the evaporated HCl and HNO3 from the particles on the Teflon filter by the first nylon filter in the filter pack of the ADS. Collection efficiency and capacity of HCl and HNO3 by the nylon filters need further investigation.
URI: http://hdl.handle.net/11536/30074
ISSN: 1047-3289
期刊: JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
Volume: 50
Issue: 12
起始頁: 2120
結束頁: 2128
顯示於類別:期刊論文


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  1. 000165875000010.pdf