期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 26, 期 4, 页码 810-817出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(13)60503-3
关键词
PM1.0; water-soluble inorganic ions; haze; source; back trajectory
资金
- Natural Science Foundation of China [41103061]
- Doctoral Fund Project of the Ministry of Education of China [20110141120015]
- National Basic Research Programme (973) of China [2011CB707106]
In January 2013, a long-lasting severe haze episode occurred in Northern and Central China; at its maximum, it covered a land area of approximately 1.4 million km(2). In Wuhan, the largest city in Central China, this event was the most severe haze episode in the 21st century. Aerosol samples of submicron particles (PM1.0) were collected during the long-lasting haze episode at an urban site and a suburban site in Wuhan to investigate the ion characteristics of PM1.0 in this area. The mass concentrations of PM1.0 and its water-soluble inorganic ions (WSIIs) were almost at the same levels at two sites, which indicates that PM1.0 pollution occurs on a regional scale in Wuhan. WSIIs (Na+, NH4+, K+, Mg2+, Ca2+, Cl-, NO3- and SO42-) were the dominant chemical species and constituted up to 48.4% and 47.4% of PM1.0 at WD and TH, respectively. The concentrations of PM1.0 and WSIIs on haze days were approximately two times higher than on normal days. The ion balance calculations indicate that the particles were more acidic on haze days than on normal days. The results of the back trajectory analysis imply that the high concentrations of PM1.0 and its water-soluble inorganic ions may be caused by stagnant weather conditions in Wuhan.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据