Abstract：Concentrations of organic carbon (OC) and element carbon (EC) in PM2.5 were measured at three sites including urban and suburban areas in Tianjin, from September 4 2009 to February 25 2010. Average PM2.5 levels was 123.85μg/m3. The average OC and EC concentrations in PM2.5 were 14.48 and 4.27μg/m3, accounting for 11.7% and 3.5% of particulate mass, respectively. Secondary organic carbon calculated based on minimum OC/EC ratio method was 5.1μg/m3 for autumn and 6.5μg/m3 for winter, accounting for 40.7% and 35.7% of the total organic carbon, or 4.3% and 4.9% of particulate mass, respectively. EC concentrations had good negative correlations with temperature, while OC, EC and TC concentrations had significant negative correlations with wind speed during the observational period. Air masses looped around observation site (L) and from the north and northwest of China (N/NW) were featured with higher OC and EC concentrations contrast to other categories. Multi-sources (including biomass burning, vehicle emission, coal combustion and road dust) contributed to OC and EC burden in Tianjin during observation period.
霍静, 李彭辉, 韩斌, 陆炳, 丁潇, 白志鹏, 王斌. 天津秋冬季PM2.5碳组分化学特征与来源分析[J]. 中国环境科学, 2011, 31(12): 1937-1942.
HUO Jing, LI Peng-Hui, HAN Bin, LU Bing, DING Xiao, BAI Zhi-Peng, WANG Bin. Character and source analysis of carbonaceous aerosol in PM2.5 during autumn-winter period, Tianjin.. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(12): 1937-1942.
