由光化学反应和排放清单判断城市PM_(2.5)首要污染源的方法

PM_(2.5) primary sources determination according to the photochemical smoke reaction mechanism and emissions inventory

以江苏省扬州市区2013年和2015年空气主要污染物浓度数据为例,依据光化学反应和空气污染物排放清单,提出了一种简易判断城市PM_(2.5)首要污染源的方法.结果证实:可通过光化学反应规律和空气监测数据推断对城市PM_(2.5)形成影响最大的一次污染物,并由该一次污染物的排放清单,确认其中排放量最大的污染源为该城市PM_(2.5)的首要污染源.该方法可为控制和治理城市PM_(2.5)提供相应参考.

Particles less than 2.5 micrometers in diameter(PM2.5)in most Chinese cities mainly come from photochemical reactions and the aggregation of photochemical products,rather than direct emissions.Taking the concentrations of air pollutants in Yangzhou in 2013 and 2015 as examples,a simple method is developed to confirm the primary pollution source of PM2.5 in Yangzhou based on the photochemical reaction and air pollutant emission inventory.Firstly,the most influential primary pollutant for the formation of PM2.5 is found according to the rule of photochemical reaction and air monitoring data.The pollutants are mainly NCX,S0 2 and VOCs.Secondly,a list of pollutant emissions is made according to the city air pollutant emissions.The one with the largest emission in the list is the main pollution source of PM2.5 in urban areas.This is also the main pollution source that should be controlled firstly for the control and governance of PM2.5.