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jsp.display-item.identifier=請使用永久網址來引用或連結此文件:
https://ir.csmu.edu.tw:8080/ir/handle/310902500/17675
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题名: | Synthesis of photoresponsive hybrid alginate hydrogel with photo-controlled release behavior |
作者: | MT, Chuang YC, Chen CT, Lee CH, Cheng YJ, Tsai SY, Chang ZS, Su |
贡献者: | 中山醫學大學醫學應用化學系(含碩士班) |
关键词: | Chemical composition;Mass fraction;PM(2.5);Positive matrix factorization;Source apportionment |
日期: | 2016-07 |
上传时间: | 2017-04-05T09:21:25Z (UTC)
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出版者: | Environ Pollut. |
ISSN: | 0269-7491 |
摘要: | To investigate the characteristics and contributions of the sources of fine particulate matter with a size of up to 2.5 μm (PM2.5) during the period when pollution events could easily occur in Taoyuan aerotropolis, Taiwan, this study conducted sampling at three-day intervals from September 2014 to January 2015. Based on the mass concentration of PM2.5, the sampling days were classified into high PM2.5 concentration event days (PM2.5>35 μg m(-3)) and non-event days (PM2.5<35 μg m(-3)). In addition, the chemical species, including water-soluble inorganic ions, carbonaceous components, and metal elements, were analyzed. The sources of pollution and their contributions were estimated using the positive matrix factorization (PMF) model. Furthermore, the effect of the weather type on the measurement results was also explored based on wind field conditions. The mass fractions of Cl(-) and NO3(-) increased when a high PM2.5 concentration event occurred, and they were also higher under local emitted conditions than under long range transported conditions, indicating that secondary nitrate aerosols were the major increasing local species that caused high PM2.5 concentration events. Seven sources of pollution could be distinguished using the PMF model on the basis of the characteristics of the species. Industrial emissions, coal combustion/urban waste incineration, and local emissions from diesel/gasoline vehicles were the main sources that contributed to pollution on high PM2.5 concentration event days. In order to reduction of high PM2.5 concentration events, the control of diesel and gasoline vehicle emission is important and should be given priority. |
URI: | http://dx.doi.org/10.1016/j.envpol.2016.04.045 https://ir.csmu.edu.tw:8080/ir/handle/310902500/17675 |
關聯: | Environ Pollut. 2016 Jul;214:273-81. |
显示于类别: | [醫學應用化學系暨碩士班] 期刊論文
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