Organic and inorganic aerosol compositions in Ulaanbaatar, Mongolia, during the cold winter of 2007 to 2008: Dicarboxylic acids, ketocarboxylic acids, and α‐dicarbonyls

左旋葡糖 气溶胶 环境化学 总有机碳 无机离子 化学 环境科学 有机质 琥珀酸 有机化学 离子 生物质燃烧
作者
Jinsang Jung,Tsatsral Batmunkh,Young Jin Kim,Kimitaka Kawamura
出处
期刊:Journal of Geophysical Research [American Geophysical Union]
卷期号:115 (D22) 被引量:88
标识
DOI:10.1029/2010jd014339
摘要

To investigate the distributions and sources of water‐soluble organic acids in the Mongolian atmosphere, aerosol samples (PM 2.5 , n = 34) were collected at an urban site (47.92°N, 106.90°E, ∼1300 m above sea level) in Ulaanbaatar, the capital of Mongolia, during the cold winter. The samples were analyzed for water‐soluble dicarboxylic acids (C 2 –C 12 ) and related compounds (ketocarboxylic acids and α ‐dicarbonyls), as well as organic carbon (OC), elemental carbon, water‐soluble OC, and inorganic ions. Distributions of dicarboxylic acids and related compounds were characterized by a predominance of terephthalic acid (tPh; 130 ± 51 ng m −3 , 19% of total detected organic acids) followed by oxalic (107 ± 28 ng m −3 , 15%), succinic (63 ± 20 ng m −3 , 9%), glyoxylic (55 ± 18 ng m −3 , 8%), and phthalic (54 ± 27 ng m −3 , 8%) acids. Predominance of terephthalic acid, which has not been reported previously in atmospheric aerosols, was mainly due to uncontrolled burning of plastic bottles and bags in home stoves for heating and waste incineration during the cold winter. This study demonstrated that most of the air pollutants were directly emitted from local sources such as heat and power plants, home stoves, and automobiles. Development of an inversion layer (<700 m above ground level) over the basin of Ulaanbaatar accelerated the accumulation of pollutants, causing severe haze episodes during the winter season.
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