摘要
利用2011年8月-2012年7月环保局(对照点)和钢研所(工业区)两个监测点的PM2.5的24小时连续监测数据,分析了上海市宝山区大气中PM2.5的浓度时空变化特征。并以四次灰霾事件为例解析了灰霾期间大气颗粒水溶性离子特征,以及灰霾期间PM2.5源特征。PM2.5中水溶性无机离子是以二次离子为主,因此,二次离子的污染水平可反映PM2.5的污染程度,是主要影响灰霾天气产生的物质。灰霾期间大气条件有利于二次离子的大量形成,更进一步加重大气细粒子的污染。而且,宝山地区大气细粒子污染具有受本地流动源和固定源双重排放控制的特征。
This paper adopts 24 -hour monitoring data of PM2.5 in two monitoring points of Environmental Protection Bureau （ clean control point） and Steel Research Institute （ industrial zone） in Shanghai Baoshan District from August 2011 to July 2012 to study the variation characteristics of PM2.5 concentration. The water - soluble ionic characteristics of atmospheric particles and source characteristics during four haze events are discussed. Water - soluble inorganic ions of PM2.5 is mainly composed of second- ary ion, therefore, pollution levels of PM2.5 is reflected by secondary ions, which has main impacts of the haze. During the haze, the atmospheric conditions are more conducive to form a large number of secondary ions, aggravating the atmosphere of tiny parti- cle pollution. Moreover, characteristics of atmospheric tiny particle pollution in Baoshan region are under the dual influences of local mobile sources and stationary sources.
出处
《环境科学与管理》
CAS
2014年第4期120-123,169,共5页
Environmental Science and Management
关键词
PM2
5
污染特征
源解析
PM2.5
the pollution characteristics
source analysis
