Ambient Mercury Sources in Rochester, NY: Results from Principle Components Analysis (PCA) of Mercury Monitoring Network Data

作者：Huang Jiaoyan; Choi Hyun Deok; Hopke Philip K; Holsen Thomas M^*

来源：Environmental Science & Technology, 2010, 44(22): 8441-8445.

DOI：10.1021/es102744j

Continuous atmospheric measurements of speciated mercury (Hg) (elemental mercury (Hg(o)), reactive gaseous mercury (RGM), and particulate mercury (Hg(p))) were made in Rochester, NY from Dec 2007 to May 2009. Continuous measurements of ozone (O(3)), sulfur dioxide (SO(2)), carbon monoxide (CO), particulate matter (PM(2.5)), 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 Hg(o) in winters. Positive correlations between RGM and O(3) in the spring and summer may be indicative of Hg(o) oxidation. RGM concentrations increased simultaneously with SO(2) suggesting the influence of coal fired power plants (CFPP). The fifth factor (F5) containing O(3) (high negative loading), CO (positive loading), Hg(o) 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.

• 出版日期2010-11-15