Comparison between back-trajectory based modeling and Lagrangian backward dispersion Modeling for locating sources of reactive gaseous mercury

被引:71
作者
Han, YJ
Holsen, TM [1 ]
Hopke, PK
Yi, SM
机构
[1] Clarkson Univ, Dept Civil & Environm Engn, Potsdam, NY 13699 USA
[2] Clarkson Univ, Dept Chem Engn, Potsdam, NY 13699 USA
[3] Clarkson Univ, Ctr Air Resources Engn & Sci, Potsdam, NY 13699 USA
[4] Seoul Natl Univ, Sch Publ Hlth, Seoul 110799, South Korea
[5] Seoul Natl Univ, Inst Hlth & Environm, Seoul 110799, South Korea
关键词
D O I
10.1021/es0498540
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Reactive gaseous mercury (RGM) was measured using an annular denuder coated with potassium chloride at three rural sites (Potsdam, Stockton, and Sterling) in New York State from April 2002 to April 2003. Concentrations. of RGM ranged from 0.1 to 84.6 pg m(-3) with large spatial and temporal variation. Potential source contribution function (PSCF), a common receptor modeling tool, was used with these measurements, and source-receptor relationships were calculated using back-dispersion and deposition as well as back-trajectories. Modeling results were compared with the RGM emissions inventory, and Spearman rank-order correlation coefficients were calculated. PSCF results incorporating backward dispersion and deposition were better correlated with the emissions inventory than PSCF based on back-trajectories alone. This difference was determined to be mainly due to the inclusion of dispersion rather than deposition. The main sources of RGM were suggested to be coal-fired power plants in New York and Pennsylvania, the large copper smelter in Quebec, and the taconite mining areas around the Great Lakes.
引用
收藏
页码:1715 / 1723
页数:9
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