| Summary: | 碩士 === 國立成功大學 === 環境工程學系碩博士班 === 92 === This research used a sampling system , composed of MOUDI and Nano- MOUDI , has been applied to take nanoparticles into four groups (10~18、18~ 32、32~56、56~100 nm). The filter was weighed by a ultra-micronbalance . The components were analyzed by IC for identifying the components of Cl-、SO42-、NO3-、NH4+、Na+、K+、Mg2+、Ca2+ .
In this study , the mass concentration of nanoparticle at Chao-Chou station was 1.29~4.62μg/m3 , the values of nano-PM/PM1、nano-PM/PM2.5 and nano-PM/PM10 were 3.0~8.3%、2.2~6.1% and 1.7~4.9% , respectively . The mass concentration of nanoparticle in Da-Liao station was 1.17~3.15μg /m3 , with the ratio of nano-PM /PM1、nano-PM /PM2.5 and nano-PM/PM10 were 2.9~8.5%、2.1~6.1% and 1.5~4.2% , respectively . The correlation of mass concentration between nano-PM and PM1、PM2.5、PM10 was poor . PM episode days were result from the raise of fine particle mass concentration . Size distribution figure shows that atmospheric particles present three mode , the MMD of nanoparticle was 16~49 nm .
The data shows that SO42- was the most abundant component which constitutes 8.0% of the nanoparticle mass , The other dominant species include NH4+(5.4%) and NO3-(3.9%) . Non-analysed species were approximate 78% . It shows that the inorganic species were not the key component in the nanoparticles .
The SOR/NOR to discuss the property of gas-to-particle conversion of particle that have different diameter . The main conversion of sulfate and nitrate were take place at the diameter ranged from 0.18 to 1.8 μm . Though the surface area of nanoparticles were very large , the conversion of sulfate and nitrate were a little .
|
|---|
