基于PCA-MLR模型的城市区域PM_(2.5)污染来源解析实证研究——以长株潭城市群为例

Urban PM_(2.5) Pollution Source Apportionment and Control Countermeasures Based on PCA-MLR Model: An Example of Chang-Zhu-Tan City Cluster

利用2013年9月-10月长株潭城市群PM2.5浓度及颗粒物元素组分监测分析数据,联合运用富集因子法和PCA-MLR模型进行了PM2.5污染来源解析的实证研究,在此基础上提出城市区域PM2.5防控的对策建议。结果表明,长沙市的PM2.5污染主要来源于交通尘、建筑水泥尘、冶炼尘及农业污染;株洲市的PM2.5污染主要来源于冶炼尘、建筑水泥、煤烟尘及地面扬尘;湘潭市的PM2.5污染主要来源于地面扬尘、冶炼尘、煤烟尘及建筑水泥尘。

Using air quality monitoring data of PM2. 5 concentrations and particle elemental composition in Chang-Zhu-Tan city cluster from September to October in 2013, this paper empirically analyzes the PMzs source apportionment using enrichment factor analysis and PCA-MLR model in combination. Based on this,this paper presents PMz 5 prevention and control countermeasures and policy suggestions in urban area. The results shows that PMz 5 pollution in Changsha city mainly comes from the traffic dust, construction ＆ cement dust, smelting dust and agricultural pollution;PMz 5 pollution in Zhuzhou city mainly comes from smelting dust, construction ＆ cement dust, coal ash and dust, and ground dust;PMz 5 pollution in Xiangtan city mainly comes from the ground dust, smelting dust, coal ash and dust, construction ＆ cement dust. On this basis,this paper puts forward some countermeasures to prevent and control the urban PM2.5 pollution in Chang-Zhu-Tan City Cluster from aspects such as mechanism innovation and control means.