大连市大气中气态总汞的时间分布特征研究

A Research on Time Distribution Characteristics of Total Gaseous Mercury in The Atmosphere of Dalian City

为研究大连市大气中气态总汞的时间分布特征,采用Lumex RA-915AM型测汞仪对大连市气态总汞进行了长达一年(2015年)的连续监测。结果表明:2015年大连市气态总汞年平均值为3.72 ng/m3;季节浓度高低顺序为春季>夏季>冬季>秋季;月均值最大值出现在夏季,日均值最大值出现在春季;春季气态总汞浓度白天明显高于夜间,而夏季则白天明显低于夜间,秋季、冬季白天与夜间气态总汞浓度没有明显差别。

In order to research the time distribution characteristics of total gaseous mercury in the atmosphere of Dalian city, Lumex RA-915 AM mercury analyzer were used to monitor the total gaseous mercury of Dalian city for one year（2015）.The results showed that the annual average value of the total gaseous mercury of Dalian city was 3.72 ng/m^3 in 2015.The descending order on the total gaseous mercury concentration of different season was spring, summer, winter, autumn.The monthly mean maximum value appeared in summer and the daily mean maximum value appeared in spring.The total gaseous mercury concentration in the spring day was significantly higher than that at night,but the summer day was significantly lower than the summer night, and there was no obvious difference between the day and the nigh in the autumn and winter.