Department of Civil and Environmental Engineering, Clarkson University, Potsdam, New York 13699-5712, USA.
Environ Sci Technol. 2010 Nov 15;44(22):8441-5. doi: 10.1021/es102744j.
Continuous atmospheric measurements of speciated mercury (Hg) (elemental mercury (Hg⁰), reactive gaseous mercury (RGM), and particulate mercury (Hgp)) were made in Rochester, NY from Dec 2007 to May 2009. Continuous measurements of ozone (O₃), sulfur dioxide (SO₂), carbonmonoxide (CO), particulate matter (PM₂.₅), and meteorological data were also available. A principle components analysis (PCA) of 3886 observations of 13 variables for the period identified six major factors. Melting snow was observed to be a source of Hg⁰in winters. Positive correlations between RGM and O₃ in the spring and summer may be indicative of Hg⁰ oxidation. RGM concentrations increased simultaneously with SO₂ suggesting the influence of coal fired power plants (CFPP). The fifth factor (F5) containing O₃ (high negative loading), CO (positive loading), Hg⁰ and Hg(p) (positive), and/or RGM (negative) was identified as a mobile source which was usually observed during morning rush hours (6:00-9:00 a.m.). The concentrations of the three mercury species from the direction of the CFPP were significantly reduced following the shutdown of this source.
从 2007 年 12 月到 2009 年 5 月，在美国纽约州罗切斯特市进行了连续的大气汞形态（Hg）（元素汞（Hg⁰）、反应性气态汞（RGM）和颗粒态汞（Hgp））的测量。同时还可获得臭氧（O₃）、二氧化硫（SO₂）、一氧化碳（CO）、细颗粒物（PM₂.₅）和气象数据的连续测量。对该时期 3886 次观测的 13 个变量进行主成分分析（PCA），确定了六个主要因素。观测到融雪是冬季 Hg⁰的来源。春季和夏季 RGM 与 O₃之间的正相关可能表明 Hg⁰的氧化。RGM 浓度与 SO₂同时增加表明煤炭发电站（CFPP）的影响。第五个因素（F5）包含 O₃（高负负荷）、CO（正负荷）、Hg⁰和 Hg（p）（正）和/或 RGM（负），被确定为移动源，通常在早晨交通高峰时间（6:00-9:00 a.m.）观察到。来自 CFPP 方向的三种汞形态的浓度在该源关闭后显著降低。
