文献类型：期刊文献

英文题名：Atmospheric mercury speciation in Shanghai, China

作者：Duan, Lian[1];Wang, Xiaohao[2];Wang, Dongfang[2];Duan, Yusen[2];Cheng, Na[1];Xiu, Guangli[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Environm Monitoring Ctr, Shanghai 200235, Peoples R China

年份：2017

卷号：578

起止页码：460

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20165003125738);WOS:【SCI-EXPANDED(收录号:WOS:000390964800046)】；

基金：This publication was supported financially by NSFC (21277044), and the Fundamental Research Funds for the Central Universities (WB1113005). This work was also made possible by Australia-China Centre for Air Quality Science and Management (ACC-AQSM). The authors thank the staff from Shanghai Environmental Monitoring Center (SEMC) for helpful contribution to instrument maintenance and data collection.

语种：英文

外文关键词：Atmospheric mercury species; Diurnal variation; Sources; Shanghai

摘要：GEM (Gaseous elemental mercury), fine fraction (<25 mu m) PBM (Particle-bound mercury) and GOM (Gaseous oxidized mercury) were continuously monitored from Jun 1 to Dec 31 2014 at a suburban site in Shanghai. The average concentrations of GEM, PBM and GOM were 4.19 +/- 9.13 ng.m(-3), 197 +/- 877 pg.m(-3), 21 +/- 100 pg.m(-3), respectively, which were all much higher than those at urban sites in Europe and North America and rural areas of China, but lower than those at urban sites of China. The concentrations of the three mercury species were all found with the highest concentration in December than those in summer. Overall, GEM varied little and PBM exhibited higher level during the night, while GOM typically peaked in the noon and afternoon which is consistent with that of ozone, indicating that GOM may depend on the stronger photochemical reactions during the daytime. Despite of the weak correlations of GEM with SO2 (r = 0.14, p < 0.0001) and NOx (r = 0.17, p < 0.0001), GEM, PBM, SO2 and NO. exhibited similar diurnal trend, suggesting that coal combustion might be the important sources of mercury in Shanghai because there is no mercury mining companies and few mercuric manufacturers in Shanghai. The strong correlation of PBM with GEM and GOM showed that directly anthropogenic emission was an important source of GEM and PBM, but the gas-particle partitioning of GOM and GEM might be also another source of PBM. The lower GEM/CO ratio of 3.9 (ng.m(-3).ppmv(-1)) in Shanghai than that for mainland China and non-ferrous smelting factories were related to the few non-ferrous smelting factories around Shanghai. The results from the potential source contribution function (PSCF) model furtherly illustrated that in Shanghai the concentration of GEM in summer and autumn might be highly impacted by the local and regional source but wasn't heavily affected by long-range transport. (C) 2016 Elsevier B.V. All rights reserved.