| 英文摘要 |
In ambient air had suspended the particulate matter, that can be divided into two production mechanism. First one is primary particulate matter, that from the direct emission of air pollution sources. Second one is secondary particulate matter, that from the chemical or physical changes of gas organic pollutants. All of those particulate matter are referred as 「total suspension particulate matter (TSP)」, that on size distribution can defined two category of coarse or fine. The coarse particle are size distribution in greater than 2.5 to 10μm, and the fine particle are size distribution in equal 2.5μm or smaller.
The major health effect of particulate matter in human body are depends on particle size distribution. When the particle diameter is greater than 10μm, it is easy deposition in the respiratory area, particle size less than 0.1μm are trading with the breathing air flow into the lungs. Therefore, the particle size distribution is a important factor on the human health .
In this study, the USEPA Method 201A and JIS K0302 are compared in laboratory experimental test and field sampling. Laboratories, using different size distribution standard particle to testing the cut-size efficiency and loading effect of particle size distribution samplers. Field sampling to assess the applicability and different for those two method on four emission sources (ceramics, steel maker, electrical steel maker, power plant).
Laboratory experimental test results show that the proposed USEPA Method 201A Cyclone kit sampler has better cut-size efficiency and less loading effect than JIS K0302 proposed Cascade impactor sampler. Field sampling results show the proposed USEPA Method 201A Cyclone kit will be on the practical combination can't enter all the sampling ports (diameter less than 4 inches), only to separate use PM2.5 Cyclone sampler. JIS K0302 proposed Cascade impactor is more complicated in the assembly and has the particles deposited in the impact plate which can't be fully collected.
Two methods all require more sampling volume (2m3 or more) to get the effective weighing samples, and have isokinetic error. The PM2.5 Cyclone are better cut-size efficiency than Cascade impactor, , if only for the PM2.5/TSP sampling USEPA Method 201A will have better efficiency and convenience.
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