中文摘要：

于2013年11月和2014年5月分别对上海吴泾地区的36个采样点进行采样,并测试其汞浓度、粒度及磁化率。结果发现,11月份吴泾地区的地面灰尘中汞的平均浓度为0.182 1 mg/kg,远大于5月份（0.094 4 mg/kg）,2次结果均超过背景值,产生了一定的污染,且11月份与5月份在汞含量的空间分布上呈现出相反的趋势,主要是受到了当地的主风向与降雨量的影响。11月的汞浓度与颗粒粒度呈负相关关系,与磁化率呈正相关关系,而5月的结果中此类关系并不明显,初步认为这一结果与主风向季节性变化导致的远源输送变化有关。磁化率与汞在秋季显著的联系表明,秋季地面尘中汞的来源与磁性矿物有着较高的同源性,而地面尘粒径与汞含量间的反相关关系表明,来自区域输入的细颗粒上能携带更多的汞污染物。

英文摘要：

A sampling to test the concentration of mercury, particle size and magnetic susceptibility was held in 36 sampling points in November,2013 and May,2014, Shanghai Wujing area. The result indicated that the mercury concentration in November was 0.182 1 mg/kg,which was much higher than May （0.094 4 mg/kg）. Both of them exceeded the background value of China, and caused some pollution. The spatial distribution of mercury concentration in November and May showed the opposite trend, which was mainly caused by the local wind and the volume of rainfall. The concentration of mercury had a negative correlation with particle size and a positive correlation with magnetic susceptibility in November. But the results in May showed no obvious influence between these factors. According to a preliminary inspection, it was related to the far source delivery changes, which were caused by the seasonal direction-changed wind. The correlation between magnetic susceptibility and mercury in fall indicated that the mercury in surface dust had the same source with the magnetic minerals. The negative correlation between particle size and the mercury concentration indicated that fine particles from regional input could carry more mercury pollution.