In order to study the pollution characteristics and sources of atmospheric fine particulate matter PM2.5 in Xianning City,Hubei Province,two environmental receptor sites within Xianning City were selected as sampling points in 2022.PM2.5 was collected in different seasons,so that the constituents and sources of fine particulate matter PM2.5 could be statistically analyzed.The characteristic source spectra of local PM2.5 were constructed based on the sampling conditions,and the source of PM2.5 was analyzed by chemical mass balance model CMB.The re-sults of the study show that the seasonal mean concentration of atmospheric fine particulate matter PM2.5 in Xian-ning City shows a trend of winter＞autumn＞spring＞summer,and the main components of PM2.5 include wa-ter-soluble inorganic salts and carbon-containing components.The primary source analysis results show that the main contributor to PM2.5 is the secondary aerosol,with a contribution rate of 47.15％;the secondary source a-nalysis results show that the largest contributors are industrial sources and motor vehicles,with a contribution rate of 34％respectively.The results of secondary source analysis show that the largest contributors are industrial sources and motor vehicles,with contribution rates of 34.86％and 28.94％,respectively.According to the results of the above analysis,Xianning City should adopt comprehensive management measures in the management of fine particulate matter PM2.5,and pay attention to the control of industrial and motor vehicle emissions,as well as the adjustment of the energy structure,in order to obtain a better management effect.
关键词
细颗粒物PM2.5/化学组成/来源解析/咸宁市
Key words
fine particulate matter PM2.5/chemical composition/source analysis/Xianning City
万方数据