【摘要】 2017年11月1日-2017年12月25在乌鲁木齐米东区以每24小时为一个周期采集了34个大气PM_2.5样品,结合同步的污染物实时排放数据分析了颗粒物PM_2.5汞浓度变化情况。结果表明:乌鲁木齐米东区颗粒物PM_2.5汞浓度范围为57-543pg/m³,平均值为269±131pg/m³,在我国处于中等污染水平,高于全球背景值,降雪对颗粒物PM_2.5汞有显著去除作用。3个点位颗粒物PM_2.5汞较大的变化范围表明除了地表汞的释放外,监测点明显受周边的人为汞排放源影响。通过相关性分析得出试验点位颗粒物PM_2.5汞浓度与大气污染物SO₂、NO₂呈显著正相关,表明人为汞排放源对颗粒物PM_2.5汞浓度有较大的贡献。更多还原

【Abstract】 34 air samples were collected every 24 hours in period from November 1,2017 to December 25,2017 in Midong district of Urumqi,to analyze the mercury concentration in PM_2.5 particles with pollutants emission real-time data synchronization. The results showed that the concentration range of mercury in the atmospheric PM_2.5 in the eastern region of Urumqi was 57-543 pg/m³,the average value was 269 ± 131 pg/m³,which was at a moderate pollution level in China,and was higher than the global background value. Snowfall had a significant removal effect on particulate mercury. The change range of mercury concentration in the 3 spots indicated that the monitoring spot was obviously influenced by the mercury emission from the surrounding area. Through correlation analysis,it was concluded that there was a significant positive correlation between mercury and air pollutants SO₂ and NO₂ in PM_2.5 particles. It indicated that the source of anthropogenic mercury hah a great contribution to the mercury in the atmospheric PM_2.5 particles.更多还原