文献类型：期刊文献

英文题名：Speciated mercury in size-fractionated particles in Shanghai ambient air

作者：Xiu, Guangli[1];Cai, Ji[1];Zhang, Wenying[1];Zhang, Danian[1];Bueeler, Andreas[2];Lee, Shuncheng[3];Shen, Yan[1];Xu, Lihang[1];Huang, Xuejuan[1];Zhang, Ping[1]

机构：[1]E China Univ Sci & Technol, Res Ctr Risk Assessment & Control Hazardous Chem, Shanghai 200237, Peoples R China;[2]Inst Umwelt & Verfahrenstech, CH-8640 Rapperswil, Switzerland;[3]Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China

年份：2009

卷号：43

期号：19

起止页码：3145

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20092012083270);WOS:【SCI-EXPANDED(收录号:WOS:000266896000014)】；

基金：This work was funded by Shanghai Excellent Youth University Teacher Funding, and partially supported by Shanghai Leading Academic Discipline Project (Project Number: B506). The authors are grateful to Prof. Frank, S.C. Lee and Dr. K.F. Ho, The Hong Kong Polytechnic University, for their valuable comments and suggestions. It was just because of Professor Lee's invitation that I have opportunity to visit Hong Kong where 1 clarified some concepts and completed this paper. We also thank Ms. Aidong Zhang, Shanghai Zhabei Environmental monitoring station, for her assistance with samples collecting and air quality data summarization.

语种：英文

外文关键词：Particulate mercury; Speciation analysis; HYSPLIT; Mercury; Shanghai

摘要：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 PM(1.6-3.7), 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 environment. The correlation of mercury with other pollutants including SO(2), NO(2), CO and PM(10) varies with the different mercury forms. Hybrid single-particle lagrangian integrated trajectories (HYSPLIT) model was used to back trace air mass at different representative days and results indicated that transportation from Huabei Plain will increase mercury concentration in winter and fall to some extent. The possible existing compounds and their atmospheric behavior of HPM, EPM and RPM were calculated and the compared to analyze its implication on atmospheric mercury cycle. (C) 2008 Published by Elsevier Ltd.