上海大金山岛典型大气污染特征及来源分析
Pollution characteristics and source analysis of typical air pollutants in Dajinshan Island of Shanghai

为了探究大金山岛典型大气污染物的特征及其来源,本文以气溶胶粒径谱仪、气体采样袋与测汞仪对大金山岛大气中的颗粒物PM2.5、PM10,挥发性有机物(VOCs),以及大气重金属汞进行监测、采集与分析。结果表明,颗粒物PM2.5和PM10浓度(μg/m3)在空间上,依次表现为:小金山岛(45.76,0.97＞金山码头(43.80,6.45)＞大金山岛(37.92,3.63);大气总VOCs浓度(μg/m3)在空间上,依次表现为:小金山岛(338.01)＞大金山岛(318.72)＞金山码头(303.93);大气重金属汞浓度(ng/m3)在空间上,依次表现为:小金山岛(7.33)＞大金山岛(6.02)＞金山码头(4.65)。后向轨迹模型分析表明,到达大金山岛的气团主要来自西北方位的河南中西部及长三角西北部。
Gas sampling bag,GC-MS,aerosol spectrometer and mercury analyzer were used to study the characteristics and sources of the typical air pollutants in Dajinshan,an uninhabited island in Shanghai.The results showed that the spatial distribution of PM2.5 and PM10 concentrations appeared as Xiaojinshan Island(43.80,6.45 μg/m3)＞Jinshan Wharf(43.80,6.45 μg/m3)＞Dajinshan Island(37.92,3.63 μg/m3).The spatial distribution of TVOC concentrations appeared as Xiaojinshan Island(338.01 μg/m3)＞Dajinshan Island(318.72 μg/m3)＞Jinshan Wharf(303.93 μg/m3).The spatial distribution of atmospheric mercury concentrations appeared as Xiaojinshan Island(7.33 ng/m3)＞Dajinshan Island(6.02 ng/m3)＞Jinshan Wharf(4.65 ng/m3).Backward trajectories in Dajinshan Island indicated that air masses mainly came from the middle and west part of Henan province and the northwest of Yangtze River Delta.