Pollution characteristics and source of HULIS in the fine particle during the Beijing APEC

被引：0
作者：
Zhou X.-M. [1 ]
Qi X.-J. [1 ,2 ]
Xiang P. [1 ]
Tan J.-H. [1 ,5 ]
Duan J.-C. [3 ]
He X.-L. [4 ]
He K.-B. [5 ]
Ma Y.-L. [5 ]
机构：
[1] College of Resources and Environment, University of Chinese Academy of Sciences, Beijing
[2] College of Environmental Science and Engineering, Tongji University, Shanghai
[3] State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing
[4] Environment College, Guangxi University, Nanning
[5] State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing
来源：
Huanjing Kexue/Environmental Science | 2016年 / 37卷 / 05期
关键词：
APEC; Beijing; Humic-like substances(HULIS); PM[!sub]2.5[!/sub; Source;
D O I：
10.13227/j.hjkx.2016.05.002
中图分类号：
学科分类号：
摘要：
In order to investigate the influence of the emission reduction measure during the Beijing APEC on the concentrations and pollution characteristics of humic-like substances (HULIS) in atmospheric fine particles, PM2.5 samples were collected and analyzed for OCEC, WSOC, HULIS and water-soluble ions. The concentration of HULIS in PM2.5 ranged 1μg·m-3-15μg·m-3. HULIS concentrations were 7.99μg·m-3, 5.83μg·m-3 and 7.06μg·m-3 before, during and after APEC, which indicated emission reduction measure had important effect on the reduction of HULIS. The decrease of HULIS during the APEC was significantly faster than those of EC and WSOC, while the increase of HULIS turned out to be much slower than OC, EC, WSOC and PM2.5 after the meeting. The proportions of HULIS to PM2.5 were 13.60%, 13.59%, 14.02% and 12.22% at four different stages, i.e., whole sampling period, before, during and after the APEC, while HULIS-C/OC and HULIS-C/WSOC were 28.95%, 35.51%, 28.37%, 19.93%; and 52.75%, 59.58%, 51.54%, 45.39%, respectively. HULIS was significantly positively correlated with humidity, while significantly negatively correlated with wind speed. Biomass burning and secondary transformation of VOCs might be two important sources of HULIS in Beijing. © 2016, Science Press. All right reserved.
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页码：1602 / 1608
页数：6
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