Vertical characteristics and source identification of PM_(10) in Tianjin

作     者：Zhimei Xiao Jianhui Wu Suqin Han Yufen Zhang Hong Xu Xiaoyong Zhang Guoliang Shi Yinchang Feng 

作者机构：State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and Engineering Nankai University Tianjin 300071 China Tianjin Meteorological Administration Tianjin 300071 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第1期

页      面：112-115页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 070104[理学-应用数学] 0815[工学-水利工程] 081502[工学-水力学及河流动力学] 0701[理学-数学] 

基　　金：supported by the Key Projects in the Science & Technology Pillar Program of Tianjin (No. 09ZCGYSF02400) the Innovation Foundation of Nankai University,the Combined Laboratory of the Tianjin Meteorological Bureau and Nankai University the Fundamental Research Funds for the Central Universities 

主　　题：vertical characteristic PM 10 sources principal component analysis 

摘      要：Ambient PM 10 （particulate matter with a diameter less than 10μm） concentrations were measured on a 255 meter tower in Tianjin,China.The samples were collected at four vertical levels （10,40,120 and 220 m）.Vertical characteristics for PM 10 samples were studied.The results showed that the concentrations of PM 10 and constituent species had a negative correlation with the sampling height.The highest concentrations of PM 10 and species were obtained at the 10 m level,and the lowest concentrations were measured at the 220 m level.For the fractions of species to total mass,SO 4 2- and NO 3- had higher values （fraction） at greater height;while Ca had a higher fraction at lower height.Possible source categories for the PM 10 ambient dataset were identified by the principal component analysis method.The possible source categories included crustal dust,vehicles,cement dust,and incineration as well as secondary sulfate and nitrate sources.Analysis of meteorological factors on PM 10 concentrations indicated that wind speed and inversion may be the main factors contributing to different concentrations of PM 10 at different heights.