于2015年夏季(6-8月)和冬季(12月、2016年1-2月)利用汞形态分析仪(Tekran 1130/1135/2537B)对宁波市不同形态大气汞进行了连续监测,并对其含量特征和来源进行分析.结果表明,夏季气态单质汞(GEM)、颗粒态汞(PBM)及活性气态汞(RGM)浓度范围分别为1.51-4.88 ng·m-3(均值2.50 ng·m-3)、10.95-646.90 pg· m-3(均值155.49 pg·m-3)和8.64-316.68 pg·m-3(均值88.22 pg· m-3);GEM含量主要受到大气长距离输送和气象条件的影响,PBM受交通影响较大,而RGM受到工业排放及气象条件的影响.冬季GEM、PBM及RGM浓度范围分别为1.73-5.33 ng·m-3(均值2.89 ng·m-3)、133.87-1723.99 pg·m-3(均值713.15 pg·m-3)和17.52-309.17 pg· m-3(均值96.94 pg·m-3);GEM受长距离输送的影响,PBM除来自燃煤和交通外,还受到生物质燃烧和烟花爆竹排放的影响,而RGM的主要来源是工业排放.后向气团轨迹分析结果表明,我国北部为高浓度汞源,而海上气团携带汞含量较低.
This study used a mercury speciation analyzer (Tekran 1130/1135/2537B) to monitor the speciated atmospheric mercury from June,2015 to February,2016 Ningbo,China,and analyzed the characteristics and sources of atmospheric mercury species.The results showed that the contents of the gaseous elemental mercury (GEM),particulate mercury (PBM) and reactive gaseous mercury (RGM) were respectively 1.51-4.88ng·m-3 (average 2.50 ng·m-3),10.95-646.90 pg·m-3(average 155.49 pg·m-3) and 8.64-316.68 pg· m-3 (average 88.22 pg· m-3) in summer.The GEM was influenced by long distance transport and meteorological condition.The sources of PBM and RGM were automobile exhaust and industrial emission,respectively.In winter,the contents of the above three atmospheric mercury species were 1.73-5.33 ng·m-3,133.87-1723.99 pg·m-3 and 17.52-309.17 pg·m-3 with the mean values of 2.89 ng· m-3 713.15 pg· m-3 and 96.94 pg·m-3 respectively.Compared with summer,the sources of PBM were coal combustion,automobile exhaust,biomass burning and fireworks.The results of backward air mass trajectory using HYSPLIT software showed that mercury concentration is high from the north air mass but low from the ocean.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%