文献类型：会议论文

英文题名：Characterization of PM and Microclimate in a Shanghai Subway Tunnel, China

作者：Qiao, Ting[1];Xiu, Guangli[1];Zheng, Yi[2];Yang, Jun[3];Wang, Lina[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, Shanghai 200237, Peoples R China;[2]Tech Ctr Shanghai Shentong Metro Grp Co Ltd, Shanghai 201103, Peoples R China;[3]Shanghai An He Environm Testing Tech Co Ltd, Shanghai 201611, Peoples R China

会议论文集：7th World Congress on Particle Technology (WCPT)

会议日期：MAY 19-22, 2014

会议地点：Beijing, PEOPLES R CHINA

语种：英文

外文关键词：Subway; Tunnel; Microclimate; PM1; PM2.5; PM10

摘要：A real-time monitoring campaign was conducted from November 11th to November 15th, 2013 in a Shanghai subway tunnel, consisting of temperature (T), relative humidity (RH) and PM1, PM2.5 and PM10. The objective was to characterize PM and microclimate in the subway tunnel. Results indicated that median values of T, RH, PM1, PM2.5 and PM10 were 29.4 degrees C, 29.6%, 42 mu g/m(3), 46 mu g/m(3) and 58 mu g/m(3), respectively. Air quality in the tunnel was comparatively good, with 76% of PM2.5 and 91% of PM10 reaching relative standards. Independent samples t-test verified that PM1, PM2.5 and PM10 presented significant statistical differences between peak hours and off-peak hours (p < 0.05). Notable weekly variation emerged during monitoring periods, which of all particles was as following: Friday > Thursday > Monday, Tuesday > Wednesday. Ratios of PM1/PM10 and PM2.5/PM10 were 0.49-1.00 and 0.56-1.00, respectively, which were high in outage and low in operation of trains. This phenomenon might result from plenty of coarse particles generated by mechanical grinding in the process of train driving. (C) 2015 The Authors. Published by Elsevier Ltd.