Department of Civil and Environmental Engineering, Clarkson University, 8 Clarkson Ave., Potsdam, NY 13699-5710, USA.
Sci Total Environ. 2013 Mar 15;448:96-106. doi: 10.1016/j.scitotenv.2012.08.052. Epub 2012 Sep 5.
Tekran® Hg speciation systems were used at a rural site (Huntington Forest, NY; HF) and a suburban site (Rochester, NY; ROC) to measure gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and fine particulate-bound mercury (PBM2.5) concentrations for two years (December 2007 to November 2009). Ancillary data were also available from the New York State Department of Environmental Conservation and the United States Environmental Protection Agency Clean Air Status and Trends Network. Seasonal GEM concentrations were similar at both sites and influenced by factors such as the planet boundary layer (PBL) height and mercury emissions from snow, soil, and point sources. In some seasons, O3 was negatively correlated with GEM at ROC and positively correlated with GEM at HF. At HF, O3 was correlated with GOM and was typically higher in the afternoon. The cause of this pattern may be photochemical reactions during the day, and the GOM diel pattern may also be due to deposition which is enhanced by dew formation during the night and early morning. PBM2.5 concentrations were higher in winter at both sites. This is indicative of local wood combustion for space heating in winter, increased sorption to particles at lower temperatures, and lower PBL in the winter. At the suburban site, 2 of 12 events with enhanced GEM/CO ratios were poorly correlated with SO2/GOM, implying that these two events were due either to long range transport or regional metallurgical industries in Canada.
Tekran® Hg 形态分析系统曾在一个农村地区（纽约亨廷顿森林，HF）和一个郊区地区（纽约罗彻斯特，ROC）使用，以测量两年（2007 年 12 月至 2009 年 11 月）内气态元素汞（GEM）、气态氧化汞（GOM）和细颗粒结合态汞（PBM2.5）的浓度。此外，纽约州环境保护部和美国环境保护署清洁空气状况和趋势网络也提供了辅助数据。两个地点的季节性 GEM 浓度相似，受平流层边界层（PBL）高度和雪、土壤和点源的汞排放等因素的影响。在某些季节，ROC 地区的 O3 与 GEM 呈负相关，而 HF 地区的 O3 与 GEM 呈正相关。在 HF 地区，O3 与 GOM 相关，通常在下午更高。这种模式的原因可能是白天的光化学反应，而 GOM 的日变化模式也可能是由于夜间和清晨露水形成时增强的沉积作用。两个地点的 PBM2.5 浓度在冬季更高。这表明冬季当地木材燃烧用于空间供暖，较低温度下颗粒的吸附增加，以及冬季平流层较低。在郊区地区，12 次增强的 GEM/CO 比值事件中有 2 次与 SO2/GOM 的相关性较差，这表明这两个事件要么是由于长途运输，要么是由于加拿大的区域冶金工业。
