我国PM_(2.5)污染现状及来源解析研究

Analytical Studies of PM_(2. 5) Pollution and Source identification in China in 2013

利用2013年我国各城市PM2.5浓度数据及查找大量文献,对我国细颗粒物的污染现状及重点城市细颗粒物来源解析工作进行了初步研究。结果发现,我国PM2.5浓度水平较高且空间差异较大,呈现明显的时空分布特征;PM2.5浓度高值区主要分布在华北平原、四川盆地、长三角地区,华北地区年均浓度在80μg/m3左右,各城市PM2.5浓度季节变化基本为冬季＆gt;春季＆gt;秋季＆gt;夏季;燃煤源、工业源、汽车尾气是对PM2.5有明显贡献的主要排放源类,机动车尾气对PM2.5贡献的大多在10%～30%。

Using PM2. 5concentration data of 2013 in China and referring a lot of literature,we preliminary studied the pollution of fine particulate matter and summarized PM2. 5source apportionment in the key cities in China. PM2. 5showed significant spatial and temporal distribution;high surface concentrations of PM2. 5concentrated mainly in the North China Plain,the Sichuan Basin,Yangtze River Delta; the average annual concentration of PM2. 5were about 80 μg /m3in North China Plain; Seasonal changes in the concentration of PM2. 5were winter spring autumn summer; fired sources,industrial sources,vehicle exhaust were the major source of PM2. 5; motor vehicle exhaust mostly contributed10%-30%.