| Summary: | 碩士 === 正修科技大學 === 營建工程研究所 === 106 === The aim of this study is to investigate the exposed dust in the opening raw material storage field to the fine suspended particles in the perimeter atmosphere (PM2.5). To investigate the main contribution, investigate the atmospheric fine suspended particulates in heavy industrial plant and nearby traffic densely populated areas (PM2.5). The influence of concentration change, raw material storage field, all kinds of fixed sources and mobile source emissions on the air quality of the perimeter, so as to put forward the strategy and suggestion of regional control reduction.
This research investigates the background survey station (Xiaogang station and Daliao station ) Analysis of information of survey stations over the years and use of air quality fine suspended particulate sampler (PQ200) collect and test the two seasons PM2.5 concentration, PM2.5 Chemical composition analysis, potential estimation of pollutant sources, simulation of storage field material heap Dispersion model (AERMOD) and its original nature PM2.5 contribution calculation.
The results showed that the simulated increment of concentration in summer and winter were 0.00 ~ 0.51 μg/m3 , < 0.01 ~ 0.43 μg/m3 , the results of quality concentration test result in summer and winter respectively 10 ~ 24 μg/m3 , 37 ~ 64 μg/m3 , the ratio between the simulation increment of concentration and the measured concentration can be seen in the summer and winter 0.00 ~ 8.25% , < 0.01 ~ 1.04% , showing PM2.5 concentrations are significantly lower than the standard, winter due to prevailing wind direction will be the coastal industrial zone pollutant import, resulting in the accumulation of pollutants in the south side of the perimeter point, making the winter concentration slightly higher than the summer.
The results of chemical analysis show that the summer concentration is between 10~24 μg/m3 , the main ingredient is SO42-(73.6%), affected by the waterfront industry and two times the contribution of derivatives; winter concentration is between 37~64 μg/m3 , the main ingredient is NO3-(36.5%), due to high concentration season in relative humidity high (70% above ) and under low temperature environment, make NO3- concentration increase. Organic carbon (OC) and Elemental carbon (EC) concentrations found in oc by correlation analysis the values were significantly higher than EC concentration, showing that the main carbon components came from derived gas glue. In the summer, the main components of metal elements are Na, K and Si, the main components of metal components in winter are Na, K, Fe and Si and Zn, influenced by thenorthern Monsoon and the northwest wind, are mainly influenced by the crust elements and the impact of sea salt droplets.
The results of the above analysis show that the fine suspended particles in the perimeter atmosphere of the heap storage field PM2.5 the influence may be affected by multiple pollution, including two times of gas glue, traffic source, mining and metallurgy industry, metal smelting, construction engineering and other pollution, so it is not obvious that the emissions from the storage sites of raw materials.
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