唐山市PM2.5污染来源解析与环境容量研究

Source Identification and Environmental Capacity of PM2.5 in Tangshan City

    摘要
  • 摘要: 通过搭建WRF-CMAQ空气质量模型，模拟唐山市PM2.5污染区域及行业来源，并以PM2.5年均浓度达标为约束条件，核算唐山市的环境容量和超载率。结果表明，周边地区对唐山市PM2.5浓度的年均传输影响为27.8%，影响由高到低的城市依次为天津市（8.0%）、北京市（2.5%）、沧州市（2.2%）、保定市（1.7%）、秦皇岛市（1.5%）、廊坊市（1.4%）、承德市（1.0%）。唐山市本地电力、工业源、民用源、移动源和扬尘源对PM2.5年均浓度贡献比例分别为2.8%、23.1%、5.3%、6.7%和33.9%，其中钢铁排放对唐山市的PM2.5浓度贡献比例为13.4%。PM2.5年均浓度达到35μg/m3时，唐山市SO2、NOX、VOCs、NH3和一次PM2.5的环境容量分别为4.5万t、10.2万t、7.3万t、8.1万t和4.1万t，超载率分别为245.7%、248.8%、162.7%、126.6%和289.0%。

     

    Abstract: In this research,the Weather Research and Forecasting Model （WRF） in combination with Community Multiscale Air Quality Model （CMAQ） was built to simulate the PM2.5 pollution and industry sources in Tangshan City,and the environmental capacity and overload rate of Tangshan City were calculated under the constraint condition that the average annual PM2.5 concentration reached the standard.The average annual transmission impact of PM2.5 in Tangshan was 27.8%,the cities with the higher impact were Tianjin （8.0%）,Beijing （2.5%）,Cangzhou （2.2%）,Baoding （1.7%）,Qinhuangdao （1.5%）,Langfang （1.4%） and Chengde （1.0%）.Local power,industrial,civil,mobile and dust sources contributed 2.8%,23.1%,5.3%,6.7%and 33.9%to the PM2.5 concentration in Tangshan,respectively.Steel emissions contributed 13.4% to the PM2.5 concentration in Tangshan.With the average annual concentration of PM2.5 reaching 35μg/m3 as the constraint condition,the environmental capacity of SO2,NOX,VOCs,NH3 and primary PM2.5 in Tangshan was 45000 tons,102000 tons,73000 tons,81000 tons and 41000 tons respectively,and the overload rate were 245.7%,248.8%,162.7%,126.6%and 289.0%,respectively.

     

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