文献类型：期刊文献

英文题名：Seasonal variations of water soluble composition (WSOC, Hulis and WSIIs) in PM1 and its implications on haze pollution in urban Shanghai, China

作者：Qiao, Ting[1];Zhao, Mengfei[1];Xiu, Guangli[1];Yu, Jianzhen[2]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Risk Assessment &, Shanghai 200237, Peoples R China;[2]Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China

年份：2015

卷号：123

起止页码：306

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20151700785032);WOS:【SCI-EXPANDED(收录号:WOS:000367408800004)】；

基金：The authors thank very much for the financial Supported by Ph.D. Programs Foundation of Ministry of Education of China (No. 20120074140001), NSFC Grant (21277044) and Shanghai Pujiang Program (13PJD013). The Fundamental Research Funds for the Central Universities (WB1113005) also gave partially financial support. The authors thank very much for the kind help of the group of atmospheric environmental chemistry from Hong Kong University of Science & Technology for OC, EC and Hulis measurement.

语种：英文

外文关键词：PM1; Water soluble organic carbon (WSOC); Humic like substances (Hulis); Water soluble inorganic ions (WSIIs); Liquid water content (LWC); Haze episodes

摘要：A year-long PM 1 samples were collected at ECUST campus from April 2013 to February 2014 in urban Shanghai, China. Annual PM1 was (49.8 +/- 31.8) mu gm(-3), comprising of water soluble organic carbon (WSOC), humic-like substances-carbon (Hulis-C), total water soluble inorganic ions (WSIIs) and liquid water content (LWC). Corresponding values were (5.51 +/- 3.72) mu gm(-3), (2.20 +/- 1.71) mu gm(-3), (22.52 +/- 15.22) mu gm(-3) and (19.0 +/- 19.2) mu gm(-3), respectively. Seasonal variation of PM1 was winter > spring > autumn > summer, while WSOC, Hulis-C, total WSIIs and LWC were highest in winter, with insignificant differences between spring, summer and autumn. Hulis-C and WSOC in PM1 on the serious haze day were found to be 4.4 and 2.5 times higher than those on the clear days, implying that Hulis might be very important for haze pollution. Among total WSIIs, sulfate was more abundant than nitrate on clear days while nitrate eventually surpassed sulfate in haze episodes. LWC in aerosol was significantly negative correlated with visibility and had strong relationship with nitrate and sulfate. It should be noted that LWC is four times sensitive to nitrate than sulfate, hence higher nitrate on haze days in Shanghai might facilitate the hygroscopic growth of aerosol. (C) 2015 Elsevier Ltd. All rights reserved.