Pollution Characteristics Of PM_2.5 In Tai’an And Strategies Of Crowd Health Prevention And Control

In recent years,the PM2.5 concentration of Tai’an City has been maintained at a high level,which has seriously affected people’s health,and has also caused certain restrictions on the development of local tourism.Therefore,in order to improve the quality of Tai’an City air,prevent its worsening development,needs to be explicitly Tai’an City PM2.5 pollution characteristics and main components,thus to provide scientific basis for relevant countermeasures for the control of air pollution and technical support.This article systematically collected and compiled Tai’an City PM2.5 monitoring data,and the acquisition of the atmospheric environment of PM2.5 samples in water soluble ion analysis,through the consult literature review PM2.5 impact on human health,with the pollution condition of Tai’an City crowd health prevention and control strategy research.The research results are as follows:(1)The PM2.5 concentration has been declining since the observation records from 2013;The seasonal variation is obvious,and the degree of pollution is from high to low in winter,autumn,spring and summer.There are obvious diurnal changes in PM2.5,which are in bimodal pattern.Spatial variation shows that PM2.5 has certain spatial differences,with high concentrations of pollutants in agricultural universities and power schools,and low concentrations of pollutants in population schools and transportation technical schools.The linear relationship between PM2.5 and PM10 and CO is highly positive,which is positively correlated with SO2 and NO2,and negatively correlated with O3.(2)The content of 4 kinds of water-soluble ions in particulate matter is different,and the mass concentration is from large to small:SO42->NH4+->NO3->Cl-Secondary ion of PM2 5(NO3-,SO42-and NH4+)the total concentration of 31.20μg/m3,accounting for 29.10%of the concentration of PM2.5,accounted for bigger,is the main chemical components in Tai’an City receptor particles,which is closely related to the emission source of Tai’an City area type;PM2.5,the concentration of NO3-and Cl-changes the performance for the winter high summer low,NO3-seasonal difference is not obvious,SO42-high performance for summer spring is low,low NH4+ high performance for the winter spring,NH4+ in different seasons is roughly same from the form of the main;The spatial variation shows that the concentration of water-soluble ions in agricultural university and electric power is higher,and the population school is lower.SO42-/NO3-is4.82 in Tai’an City PM2.5,which is significantly higher than that in Hangzhou,Beijing,Tianjin and Qingdao,and the fixed source contributes significantly to the concentration of Tai’an City particles.(3)With the pollution condition of Tai’an City people health prevention and control strategy of research,from the point of the government should be taken to strengthen coal dust control,strengthen the management of open source,especially the dust,strengthening the motor vehicle pollution prevention and control,touch base to build and perfect the PM2.5,a discharge and inventory of emissions of volatile organic pollutants such as precursor measures such as strengthening the prevention and control of PM2.5;For the exposed individuals,it can reduce the damage of PM2.5 to the body by reducing travel out,proper ventilation and wearing face masks.