文献类型：期刊文献

英文题名：Characterization of size-fractionated particulate mercury in Shanghai ambient air

作者：Xiu, Guangli L.[1,2,3]; Jin, Qingxi[1]; Zhang, Danian[1,2,3]; Shi, Shuangyan[1]; Huang, Xuejuan[1,2,3]; Zhang, Wenying[1]; Bao, Liang[1]; Gao, Pengtao[1]; Chen, Bo[1]

机构：[1]E China Univ Sci & Technol, Inst Environm Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Res Ctr Environm Advisory, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Res Ctr Risk Assessment & Management Hazardous Ch, Shanghai 200237, Peoples R China

年份：2005

卷号：39

期号：3

起止页码：419

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：2005028778310);WOS:【SCI-EXPANDED(收录号:WOS:000226625500003)】；

语种：英文

外文关键词：particulate mercury; size-fractionated particle; speciation analysis; Shanghai

摘要：The size-fractionated particulate mercury in ambient air was collected at the top of a university campus building in Shanghai from March 2002 to September 2003. Wet digestion followed by cold vapor atom adsorption spectroscopy (CVAAS) was employed to analyze total particulate mercury concentration. Two-step extraction was performed to differentiate volatile particle-phase mercury (VPM), reactive particle-phase mercury (RPM) and inert particle-phase mercury (IPM). The average concentrations of mercury in PM(1.6), PM(8) and total suspended particle (TSP) were 0.058-0.252, 0.148-0.398 and 0.233-0.529 ng m(-3), respectively. About 50%-60% of mercury in PM(8) was in PM(1.6), and about 60%-70% of mercury in TSP was in PM(8). Particulate mercury was mainly concentrated on fine particles. The mercury fraction in fine particulate matters (< 1.6 mum) was over 4 mug g(-1) while 1-2 mug g(-1) in TSP. Both were much higher than background values, suggesting that anthropogenic sources are the predominant emission contributors. Seasonal variation indicated that the mercury in TSP in spring was higher than that in summer: however, the mercury in fine particles (< 1.6 mum) varied little. The fact that fine particulate mercury (< 1.6 mum) was well correlated with sulfate and elemental carbon, but not with fluoride, chloride, nitrate and organic carbon, demonstrates that fine particulate mercury is closely associated with stationary sources and gas-particle transformation. Speciation analysis of mercury, showed that VPM fraction decreased with the decrease of particle size, while IPM fraction increased and occupied over 50% in particle < 1.6 mum. The detailed species in VPM, RPM and IPM were discussed. Coal burning was estimated to contribute approximately 80% of total atmospheric mercury. (C) 2004 Elsevier Ltd. All rights reserved.