Analysis of PM2.5 Reduction Efficiency and Development of Its Control Program
| Absrtact |
To understand the formation mechanism of fine particle matter (PM2.5) and control them, this study reviews domestic data of the fine particle matter to understand the formation and mechanism of the fine particle matter in Taiwan, and using Ion Chromatography to analysis the samples of twenty event days at thirty stations. It is totally six hundred samples. The selection of event days is including wind direction, season, and high concentration event days. The result point out the concentration of fine particle matter increases from north to south. The concentrations of nitrate and ammonia in south stations are more than north stations, and the proportion of sulfate is less. But the annual average concentrations of the species in southern stations are more than northern stations. The result point out the concentrations of nitrate, sulfate, and ammonia increases from north to south at period of north wind direction. And at period of the south wind direction, the concentrations of nitrate and ammonia in Yunlin, Chiayi, and Hsinchu decrease from north to south. The concentration of sulfate is higher in Yunlin, and Chiayi. And we can use the result of water-soluble ions to compute the ammonium utilization, and develop control program.
It uses EPA monitoring data of precursor concentration from 95 to 101 year to resolve high concentrations of fine particle matter distribution of time and space, and using CO as diffusion factor to analysis causes of event days. The result is similar with manual analysis, and the concentration of fine particle matter is increasing from north to south. And it is using statistical tests to check.
It uses three-dimensional grid model to analysis sulfate, nitrate, and ammonia effect of point source, line source, and area source in different
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| Keyword |
the composition of PM2.5, Water-soluble ions, Event day
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