Characteristics of speciated atmospheric mercury in Chongming Island, Shanghai

被引：3
|
作者：
Li S. [1 ,2 ]
Gao W. [3 ]
Wang S.-X. [1 ,2 ]
Zhang L. [1 ]
Li Z.-J. [1 ]
Wang L. [1 ]
Hao J.-M. [1 ,2 ]
机构：
[1] State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing
[2] State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of Environment, Tsinghua University, Beijing
[3] Pudong's Meteorological Bureau, Shanghai
来源：
Wang, Shu-Xiao (shxwang@tsinghua.edu.cn) | 1600年 / Science Press卷 / 37期
关键词：
Chongming Island of Shanghai; Daily variation; Seasonal variation; Speciated atmospheric mercury; Wind direction;
D O I：
10.13227/j.hjkx.2016.09.006
中图分类号：
学科分类号：
摘要：
Continuous monitoring of gaseous elemental mercury (GEM), reactive gaseous mercury (RGM) and particulate mercury (PBM) was conducted in the Dongtan wetland park in Chongming Island, Shanghai from March 2014 to February 2015. The average concentrations of GEM, RGM, and PBM were (2.75±1.13) ng·m-3, (13.39±15.95) pg·m-3, and (21.89±40.42) pg·m-3, respectively, higher than the background concentrations of Northern Hemisphere. The atmospheric mercury showed obvious seasonal variations, with the highest seasonal average GEM concentration in summer (3.65 ng·m-3), which was mainly influenced by natural sources, while lower GEM concentrations appeared in autumn and winter influenced mainly by anthropogenic sources. The concentration of RGM was highest in spring and lowest in winter, mainly influenced by the wind direction, while PBM showed higher concentrations in autumn and winter, when heavy fine particulate pollution episodes occurred frequently. The concentrations of GEM and PBM were generally elevated in nighttime and lower in daytime caused by the mixing condition of the air masses. Most of the high RGM concentration values occurred in the afternoon of all seasons due to the higher atmospheric oxidation. The concentrations of GEM and PBM were higher in the west wind due to the emission from anthropogenic sources in Shanghai, Jiangsu, etc. The RGM concentration in southeast wind was obviously higher than those in other wind directions. The RGM was mainly from the anthropogenic sources, and the smaller wind in the southeast direction was against the dispersion of RGM. © 2016, Science Press. All right reserved.
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页码：3290 / 3299
页数：9
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