On-line Analysis and Mass Concentration Characters of Nitrate in Aerosol PM10 in Beijing
Nitrate is one of the most important components in water-soluble aerosols. The nitrate in PM10 measured from January 2004 to December 2005 in Beijing was determined using a system of combining rapid collection of fine particles and Ion Chromatography (RCFP-IC). The scientific research showed that the annual average concentration of water-soluble nitrate in PM10 in the urban area in Beijing was about 9.2 (10.5±5.3) μg·m-3 in 2004 and 8.9 (7.7±3.0) μg·m-3 in 2005 respectively. The concentration of nitrate in summer and autumn was higher than that in spring and winter. Trends of the statistics diurnal variation of nitrate showed different in different seasons. In summer, the higher concentration appeared at forenoon and the lower appeared in the afternoon. While in winter, the higher concentration appeared in the afternoon and the lower appeared at forenoon. In summer and autumn, the diurnal variation of nitrate was different in 2004 and 2005. The typical diurnal variations of nitrate was analyzed in this paper, such as heating period and non-heating period, sunny day and rainy day, less polluted period and more polluted period. The relationship of nitrate and meteorological factors can be investigated using correlation analysis.
Beijing PM10 nitrate water-soluble diurnal variation
Kai Zhang Yuesi Wang Tianxue Wen Fahe Chai Guangren Liu
Chinese Research Academy of Environmental Sciences,Beijing,100012,China; LAPC,Institute of Atmosphe LAPC,Institute of Atmospheric Physics,Chinese Academy of Science,Beijing,100029,China Chinese Research Academy of Environmental Sciences,Beijing,100012,China
国际会议
西安
英文
810-814
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）