Abstract:PM10 and PM2.5 samples were collected at two sites of Tianjin in three periods during December 2007~October 2008. Carbonaceous species were analyzed by thermal optical reflection analyzer, and concentrations of secondary organic carbon (SOC) were estimated by using OC/EC minimum ratio method. Concentrations of PM10 and PM2.5 at urban site were higher than those at suburb site in each period. PM2.5/PM10 ratio in May was the lowest, mainly because soil dust had a large contribution to PM10 in this period. Average concentrations of organic carbon (OC) and elemental carbon (EC) in PM10 and PM2.5 had the similar variation trend, and the highest values were all observed in December. OC/TC ratios in PM10 and PM2.5 ranged 0.60~0.83, 0.55~0.81, respectively. About 76% of OC in PM10 was associated with the fine particle (PM2.5) mode. Concentration of SOC was highest in December due to the potential effect of meteorological condition and local pollution sources.
吴琳, 冯银厂, 戴莉, 韩素琴, 朱坦. 天津市大气中PM10、PM2.5及其碳组分污染特征分析[J]. 中国环境科学, 2009, 29(11): 1134-1139.
WU Lin, FENG Yin-Chang, DAI Li, HAN Su-Qin, ZHU Tan. Characteristics of PM10, PM2.5 and their carbonaceous species in Tianjin City.. CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(11): 1134-1139.