Source apportionment of ambient PM_(10) in urban areas of Wuxi,China  

作　　者：Bo HAN Xiaohui BI Yonghua XUE Jianhui WU Tan ZHU Baogui ZHANG Jianqing DING Yuanxin DU 

机构地区：[1]College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China [2]Wuxi Environmental Monitoring Center,Jiangsu 214023,China

出　　处：《Frontiers of Environmental Science & Engineering》2011年第4期552-563,共12页环境科学与工程前沿（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.20877042);National Science and Technology Supporting Program during the Eleventh Five-year Plan Period(No.2007BAC16B01).

摘　　要：A total of 168 PM_(10)samples were collected during the year of 2005 at eight sites in the city of Wuxi in China.Fifteen chemical elements,three water-soluble ions,total carbon and organic carbon were analyzed.Six source categories were identified and their contributions to ambient PM_(10)in Wuxi were estimated using a nested chemical mass balance method that reduces the effects of colinearity on the chemical mass balance model.In addition,the concentrations of secondary aerosols,such as secondary organic carbon,sulfate and nitrate,were quantified.The spatially averaged PM_(10)was high in the spring and winter(123μg·m^(-3)and low in the summer-fall(90μg·m^(-3)).According to the result of source apportionment,resuspended dust was the largest contributor to ambient PM_(10),accounting for more than 50%of the PM_(10)mass.Coal combustion(14.6%)and vehicle exhaust(9.4%)were also significant source categories of ambient PM_(10).Construction and cement dust,sulfates,secondary organic carbon,and nitrates made contributions ranging between 4.1%and 4.9%.Other source categories such as steel manufacturing dust and soil dust made low contributions to ambient PM_(10).

关 键 词：source apportionment inhalable particulate matter nested chemical mass balance method 

分 类 号：F42[经济管理—产业经济]