上海郊区大气中汞的形态分布特征  

Speciation and distribution characteristics of mercury in the atmosphere in the suburbs of Shanghai

作　　者：陈筱佳 汪国瑞 霍俊涛 丁华 朱颖 罗欢 李斌 黄远东[1] CHEN Xiaojia;WANG Guorui;HUO Juntao;DING Hua;ZHU Ying;LUO Huan;LI Bin;HUANG Yuandong(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093;Hunan Environmental Monitoring Center,State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants,Changsha Hunan 410019;Shanghai Environmental Monitoring Center,National Environmental Protection Shanghai Dianshan Lake Science Observatory and Research Station,Shanghai 200235)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]湖南省生态环境监测中心,国家环境保护重金属污染监测重点实验室,湖南长沙410019 [3]上海市环境监测中心,国家环境保护上海淀山湖科学观测研究站,上海200235

出　　处：《环境污染与防治》2022年第9期1196-1201,共6页Environmental Pollution & Control

基　　金：国家环境保护重金属污染监测重点实验室开放基金项目(No.SKLMHM202110)。

摘　　要：为了解上海郊区大气中汞的形态分布特征,于2021年1-7月使用在线监测设备对上海郊区大气中的气态元素汞(GEM)、气态氧化汞(GOM)和颗粒态汞(PBM)进行了连续观测,分析了GEM、GOM和PBM的浓度特征,研究了不同空气质量下GEM、GOM和PBM的变化情况,并探讨了不同风速、风向条件下GEM、GOM和PBM的变化特征。结果表明:观测期间上海郊区大气中GEM、GOM和PBM小时质量浓度分别为(2.65±0.99)ng/m^(3)、(4.84±13.84)pg/m^(3)和(20.51±47.95)pg/m^(3),GEM的质量分数达到了99.1%,是大气中汞的主要存在形式。GEM与PM_(2.5)的Pearson相关系数为0.517,呈现出较高的显著相关性。以PM_(10)为首要污染物、空气质量恶化情况下,GEM浓度无明显变化,GOM和PBM浓度呈现下降趋势;而在以PM_(2.5)为首要污染物、空气质量恶化情况下,GEM和PBM浓度呈现上升趋势,而GOM浓度则呈现下降趋势。GEM、GOM和PBM浓度风向-风速玫瑰图相似性较低,表明GEM、GOM、PBM的污染源不具有同源性,GEM主要是受区域工业锅炉排放影响。In order to understand the speciation and distribution characteristics of mercury in the atmosphere in the suburbs of Shanghai,the gaseous elemental mercury(GEM),gaseous oxidized mercury(GOM)and particulate bound mercury(PBM)in the atmosphere in suburbs of Shanghai were continuously observed with on-line monitoring equipment from January 2021 to July 2021.The concentration characteristics of GEM,GOM and PBM were analyzed,the changes of GEM,GOM and PBM under different air quality were studied,and the variation characteristics of GEM,GOM and PBM under different wind speed and direction were also discussed.The results showed that the hourly concentrations of GEM,GOM and PBM in the atmosphere in the suburbs of Shanghai during the observation period were(2.65±0.99)ng/m^(3),(4.84±13.84)pg/m^(3)and(20.51±47.95)pg/m^(3),respectively.The mass proportion of GEM in atmospheric mercury reached 99.1%,which was the main form distribution of atmospheric mercury.The Pearson correlation coefficient between GEM and PM_(2.5)reached 0.517,showing a good significant correlation.When the air quality with PM_(10)as the primary pollutant was getting worse,the concentration of GEM did not change significantly,and the concentrations of GOM and PBM showed a downward trend.When the air quality with PM_(2.5)as the primary pollutant was getting worse,the concentrations of GEM and PBM showed an upward trend,while the concentration of GOM showed a downward trend.The similarity of rose chart of wind direction-wind speed of GEM,GOM and PBM concentration was low,indicating that the pollution sources of GEM,GOM and PBM did not have homology,and GEM was mainly affected by the emission of regional industrial boilers.

关 键 词：上海 气态元素汞 气态氧化汞 颗粒态汞 分布特征 

分 类 号：X51[环境科学与工程—环境工程]