Thermal denuder-aerosol mass spectrometer (TD-AMS) system was utilized to measure the aerosol chemical composition and volatility in the summer of 2014 in Wangdu, a rural site in North China Plain, and data of two different episodes were collected:average PM1 mass concentration of relatively low pollution episodes (ep1) was (23.3 ±15.1)·g/m3, dominated by sulfate, mainly influenced by air masses from the north; while (86.6 ±19.7)·g/m3 during high pollution episodes (ep2), dominated by organics aerosol (OA), influenced by air masses from the south; the volatility sequence of chemical species was nitrate > chloride > ammonia > organic matter>sulfate; when compared with ep1, during ep2, sulfate had a higher contribution for PM1 and was less volatile, and nitrate was more volatile; OA during ep2 was less oxidized and showed lower volatility, indicating it was more aged. The semi-volatility of atmospheric aerosol suggested that regional transport played a key role under high pollution conditions in North China during summer.
魏林通, 曹礼明, 魏静, 何凌燕, 黄晓锋. 中国望都地区夏季大气气溶胶挥发性特征[J]. 中国环境科学, 2019, 39(9): 3647-3654.
WEI Lin-tong, CAO Li-ming, WEI Jing, HE Ling-yan, HUANG Xiao-feng. Characterization of atmospheric aerosol volatility in North China during summertime. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3647-3654.
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