| Summary: | 碩士 === 國立臺北科技大學 === 環境工程與管理研究所 === 106 === L city, located on the northeast corner of Taiwan, faces the open sea and is surrounded on three sides by mountains which take up 95% of this area. It’s one of a few cities that the port goes deep into the city area. To investigate the pollution source of PM2.5, we sorted out the compositional analytical results of these years, using the data of SOR, NOR, I and J ratio and environmental background et cetera as references of future pollution control.
As we have discovered from our research, SO42- is the major constituent of water-soluble ionic and NO3- is the second major; several sampling results of metal element show that the major constituents are crustal elements which are Ca, Al and Mg; the major constituent of carbon is organic carbon. In autumn and winter, the value of SOR is detected over 0.25, which shows that sulfur oxides are more likely affected by long-distance transmission in autumn or winter; as for NOR in autumn or winter, it is also more often that the value of NOR is over 0.1, saying that the source of nitrates comes from far-distance transformation and transmission; and in the results of comparing I and J ratio, it usually happens in autumn and winter that the values of sulfates and nitrates are both neutralized. The time when nitrates are supposed to be controlled happens to be between in May to June; and the time when sulfates are supposed to be controlled happens to be between in November and December. Therefore, except for primarily managing power plant, we should implement controlling mobile source in summer and factually carry out pollution prevention in port area in winter of future management.
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