Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28575
Title: Speciated mercury in size-fractionated particles in Shanghai ambient air
Authors: Xiu, G
Cai, J
Zhang, W
Zhang, D
Bueler, A
Lee, S 
Shen, Y
Xu, L
Huang, X
Zhang, P
Keywords: HYSPLIT
Mercury
Particulate mercury
Shanghai
Speciation analysis
Issue Date: 2009
Publisher: Pergamon-Elsevier Science Ltd
Source: Atmospheric environment, 2009, v. 43, no. 19, p. 3145-3154 How to cite?
Journal: Atmospheric Environment 
Abstract: Size-fractionated particles were collected at two sites from July 2004 to April 2006 in Shanghai. The mercury in particles was extracted and divided operationally into four species: exchangeable particulate mercury (EXPM), HCl-soluble particulate mercury (HPM), elemental particulate mercury (EPM) and residual particulate mercury. The total particulate Hg concentration during the study period ranged from 0.07 ng m-3 to 1.45 ng m-3 with the average 0.56 ?? 0.22 ng m-3 at site 1, while 0.20 ng m-3-0.47 ng m-3 with the average 0.33 ?? 0.09 ng m-3 at site 2, which is far higher than some foreign cities and comparable to some cities with heavy air pollution in China. The Hg mass content also displayed evident size distribution, with higher value in PM1.6-3.7, somewhat higher or lower than the source profile. EXAM was only found in the summer, HPM have higher percentage in summer and fall rather than in winter and spring. The different mercury species showed different correlation to temperature, relative humidity, wind speed. HPM positively depends on temperature at both sites which implies the importance of mercury transformation on particles. In foggy days TPM increased greatly, but HPM didn't vary greatly as anticipated. Instead, RPM gained a distinguished increase. It demonstrated that aqueous reaction and complex heterogenic reactions in droplet might happen in acidic environmen
URI: http://hdl.handle.net/10397/28575
ISSN: 1352-2310
DOI: 10.1016/j.atmosenv.2008.07.044
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