株洲夏季大气中气态总汞浓度特征  

Characteristics of Total Gaseous Mercury Concentrations in Zhuzhou City during Summertime

作　　者：周静[1,2] 张凯[2] 柴发合[2] 郑子龙[1] 钟学才[3] 周广柱[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266590 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]株洲市环境监测中心站,湖南株洲412000

出　　处：《中国环境监测》2015年第5期50-56,共7页Environmental Monitoring in China

基　　金：国家自然科学基金(41205093);环保公益性行业科研专项(201109005);山东省自然科学基金(ZR2013DM008);国家教育部博士点基金(博导类20113718110007)

摘　　要：为研究株洲市夏季优良天气下大气中气态总汞（TGM）的浓度特征,于2013年8月利用大气汞分析仪（2537X,加拿大）进行了20 d的连续在线观测。结果显示,实验期间株洲市大气TGM的平均浓度为（4.20±3.37）ng/m3,中值浓度为3.40 ng/m3,高于背景地区和沿海城市,略低于国内其他重点城市。晴天、阴雨天TGM浓度分别为3.59、7.96 ng/m3。晴天TGM浓度具有一定日变化规律,最高值出现在早上7：00-9：00,之后逐渐降低,17：00出现最低值;TGM白天和夜间浓度分别为3.57、3.62 ng/m3,昼夜变化不大。晴天TGM与一次污染物SO2、CO、NO2具有显著的正相关性,与O3呈显著负相关性。株洲市夏季主导风向为东南风,该方向没有明显污染源,西北方向风向频率较低,但TGM浓度明显升高,其主要来源可能是位于西北方向的清水塘工业区。The concentration of total gaseous mercury （TGM） during fine days in Zhuzhou City was continuously monitored using the mercury analyzer （Tekran 2537X） for 20 days in August,2013. The results showed that the average concentration of TGM was （4.20 ± 3.37）ng/m3 , medium concentration was 3.40 ng/m3 ,lower than that of other domestic key cities and higher than the background area and coastal cities. TGM concentration in sunny days was 3.59 ng/m3 and in rainy ones was 7.96 ng/m3. The diurnal variation of TGM in sunny days showed that the maximum value appeared during 7：00 to 9：00 am, then gradually reduced and finally got to the minimum at 17：00 pm. TGM concentration was similar between daytime and nighttime,which was 3.57 ng/m3and 3.62 ng/m3 separately. Correlation between TGM and the first pollutant such as SO2, CO, NO2 showed high positive value, and the correlation between TGM and 03 showed negative value. The leading wind direction in summer was southeaster and there was no significant emission source in this direction. Northwest wind appeared lower frequency,however,the TGM concentration increased significantly, which suggested that the TGM mainly came from the Qingshuitang industrial district loacated in the northwest.

关 键 词：气态总汞 株洲市 日变化 来源 

分 类 号：X823[环境科学与工程—环境工程]