沈阳市采暖期环境空气质量日变化特征及影响因素研究

在统计分析环境空气质量数据、气象数据、污染源排放以及源解析等数据基础上,对沈阳市采暖期环境空气质量日变化特征及成因进行分析。结果表明,沈阳地区冬季采暖期间,日间主要污染物小时浓度呈"双峰"变化趋势,PM_(2.5)峰值分别出现在9—11时、21—23时;SO2峰值分别出现在7—8时、20—21时;主要污染物浓度与气压、湿度成正比,与风速、气温呈反比;废气源SO_2排放量在上午6时左右达到峰值,与环境空气污染物浓度峰值基本重合,烟尘排放峰值与环境空气PM_(2.5)浓度峰值并未重合;实时源解析结果表明,夜间污染以一次污染为主,白天二次颗粒物生成占比升高。

On the basis of analytical data such as environmental air quality, atmosphere, pollution emissions and source identification, the paper analyzed the air quality diurnal variation characteristics and the factor in the heating period in Shenyang. The results showed that, daytime hours main pollutant concentration showed a trend of ＂twin peaks＂ changes in the Shenyang area during winter heating. And PM2.5 peak appeared on the 9：00 - 11：00, 21：00 - 23：00, SO2 peak appeared on the 7：00- 8：00, 20：00- 21：00; main pollutant concentration was propor- tional to the air pressure and humidity, the wind speed and temperature was inversely proportional; SOz emissions by sources of waste gas peak at about 6：00 am, air pollutant concentration peak basic coincidence with the envi- ronment; and the soot emission peak and environmental air PM2.5 concentration peak was not overlap; source of re- al-time analytic results showed that the night was given priority to with the primary pollution, pollution of sec- ondary particles generated during the day than to rise.