临沂市城区2018年环境空气污染特征及原因分析

Characteristics and causes of ambient air pollution in Linyi City in 2018

本文以2018年临沂市环境空气监测数据为依据,对PM2.5、PM10、SO2、NO2、O3、CO六项污染物,按照浓度和污染指数进行评价,并按照月度、季度、年度变化对污染特征进行分析,结果表明,2018年临沂市城市环境空气质量未达到《环境空气质量标准》(GB3095-2012)中二级标准。综合指数为6.04,比去年同期下降了0.52,环境空气质量状况变好。环境空气中首要污染物PM2.5,其次为PM10;主要污染特征表现为尘污染较重,从煤烟型向煤烟型与机动车污染共存的新型大气复合污染转变。

Based on the 2018 ambient air monitoring data of Linyi City,this article evaluates the six pollutants PM2.5,PM10,SO2,NO2,O3,and CO according to the concentration and pollution index,and according to monthly,quarterly,and annual changes Analysis of the pollution characteristics showed that the urban ambient air quality of Linyi City in 2018 did not meet the secondary standard of the"Ambient Air Quality Standard"(GB3095-2012).The comprehensive index was 6.04,a decrease of 0.52 from the same period last year,and the ambient air quality situation has improved.The main pollutant PM2.5 in ambient air is followed by PM10;the main pollution feature is the heavy dust pollution,which changes from soot type to a new type of composite air pollution that coexists with soot and motor vehicle pollution.