Atmospheric mercury in Changbai Mountain area, northeastern China II. The distribution of reactive gaseous mercury and particulate mercury and mercury deposition fluxes

被引：72

作者：

Wan, Qi ^{[1
,2
]}

Feng, Xinbin ^{[1
]}

Lu, Julia ^{[3
]}

Zheng, Wei ^{[1
,2
]}

Song, Xinjie ^{[3
]}

Li, Ping ^{[1
,2
]}

Han, Shijie ^{[4
]}

Xu, Hao ^{[4
]}

机构：

[1] Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550002, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Ryerson Univ, Dept Biol & Chem, Toronto, ON M5B 2K3, Canada

[4] Chinese Acad Sci, Open Res Stn Changbai Mt Forest Ecosyst, Yanbian 133613, Peoples R China

来源：

ENVIRONMENTAL RESEARCH | 2009年 / 109卷 / 06期

基金：

加拿大创新基金会;

关键词：

Reactive gaseous mercury; Particulate mercury; Total mercury; Wet deposition flux; Dry deposition flux; NEW-YORK-STATE; WET DEPOSITION; PRECIPITATION; SPECIATION; TRENDS; AIR; EMISSIONS; EXCHANGE; FOREST;

D O I：

10.1016/j.envres.2009.05.006

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) and particulate mercury (Hgp) concentrations in ambient air from a remote site at Changbai Mountain area in northeastern China were intermittently monitored from August 2005 to July 2006 totaling 93 days representing fall, winter-spring and summer season, respectively. Rainwater and snow samples were collected during a whole year, and total mercury (THg) in rain samples were used to calculate wet depositional flux. A throughfall method and a model method were used to estimate dry depositional flux. Results showed mean concentrations of RGM and Hgp are 65 and 77 pg m(-3). Compared to background concentrations of atmospheric mercury species in Northern Hemisphere, RGM and Hgp are significantly elevated in Changbai area. Large values for standard deviation indicated fast reactivity and a low residence time for these mercury species. Seasonal variability is also important, with lower mercury levels in summer compared to other seasons, which is attributed to scavenging by rainfall and low local mercury emissions in summer. THg concentrations ranged from 11.5 to 15.9 ng L-1 in rainwater samples and 14.9-18.6 ng L-1 in throughfall samples. Wet depositional flux in Changbai area is calculated to be 8.4 mu g m(-2) a(-1) and dry deposition flux is estimated to be 16.5 mu g m(-2) a(-1) according to a throughfall method and 20.2 mu g m(-2) a(-1) using a model method. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：721 / 727

页数：7

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