CAJ | 학술논문

2013年1月14~17日青岛市经历了一次大范围的霾污染过程,采集并测定大气气态汞和颗粒态汞,研究汞的污染特征.结果表明,气态汞(TGM)的平均浓度为(2.8±0.9)ng/m3,颗粒汞(PHg)的平均浓度为(245±174)pg/m3.在霾发生的14、15日PHg/TSP 的比值明显高于16、17日,且TGM与PHg浓度呈负相关关系,霾日气象条件有利于TGM向PHg转化.大气汞浓度与温度、相对湿度正相关,与风速负相关.TGM与SO2、NO2显著正相关,化石燃料的燃烧是大气汞的主要来源.对大气气团的后向轨迹进行聚类分析,将其分为5类,霾日大气中的汞主要来自近距离传输,受山东本地污染影响,气态汞含量最高.
2013년1월14~17일청도시경력료일차대범위적매오염과정,채집병측정대기기태홍화과립태홍,연구홍적오염특정.결과표명,기태홍(TGM)적평균농도위(2.8±0.9)ng/m3,과립홍(PHg)적평균농도위(245±174)pg/m3.재매발생적14、15일PHg/TSP 적비치명현고우16、17일,차TGM여PHg농도정부상관관계,매일기상조건유리우TGM향PHg전화.대기홍농도여온도、상대습도정상관,여풍속부상관.TGM여SO2、NO2현저정상관,화석연료적연소시대기홍적주요래원.대대기기단적후향궤적진행취류분석,장기분위5류,매일대기중적홍주요래자근거리전수,수산동본지오염영향,기태홍함량최고.
In order to investigate the characteristics of atmospheric mercury pollution, total gaseous mercury (TGM) and particulate mercury (PHg) samples were collected in Qingdao during January 14-17, 2013, when a serious haze event occurred. The results showed that the average concentrations of TGM and PHg in Qingdao during this haze event were (2.8±0.9) ng/m3 and (245±174) pg/m3, respectively. On haze days (January 14 and 15), there was a negative correlation between TGM and PHg, and TGM/PHg ratios were higher than that on non-haze days (January 16 and 17), indicating that meteorological conditions would promote the transformation of TGM to PHg. Correlation analysis between mercury concentrations and environmental factors showed that both TGM and PHg were positively correlated with temperature and relative humidity, and negatively correlated with wind speed. TGM was positively correlated with SO2 and NO2, suggesting fossil fuel combustion was its major source. The pathways of air masses associated with the mercury samples were classified into 5 categories based cluster analysis. Atmospheric mercury in Qingdao during this event was mainly influenced by short-range transport, the influence of local pollution from Shandong area contributed to the highest TGM and PHg contents on haze days.