The characteristics and source apportionment of carbon fractions in PM2.5 during summer-winter period in Anshan City
ZHANG Wei1,2, JI Ya-qin1,2, LI Jin3, SUN Hong-feng3, LI Shu-li1,2, ZHAO Jie1,2, WANG Shi-bao1,2, WANG Wei3
1. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
2. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, Tianjin 300071, China;
3. An-Shan Environmental Monitoring Center, Anshan 114004, China
To study the characteristics of carbon fractions in PM2.5, PM2.5 samples were collected at six monitoring sites in Anshan city in July, 2014 and January, 2015. Thermal/Optical Carbon Analyzer (IMPROVE-TOR) was employed to detect the concentrations of the EC and OC in PM2.5. The source of carbonaceous aerosol was obtained by analyzing the characteristics of OC and EC, its ratio and correlation, the SOC values; its source was further obtained with factor analysis method. The results showed that the concentrations of PM2.5 in summer and winter were (53.4±18.0)μg/m3and (124.9±60.1)μg/m3, respectively. The concentrations of OC and EC in PM2.5 in summer were (5.44±0.84)μg/m3 and (2.29±0.49)μg/m3; the concentrations of OC and EC in PM2.5 in winter were (21.47±12.45)μg/m3 and (4.68±1.79)μg/m3. The range of OC/EC in summer and winter were 2.18~2.70和4.04~4.95, respectively. Compared with winter, there was significant correlation between OC and EC in summer. The SOC values in summer and winter were 2.12μg/m3 and 11.95μg/m3. The biomass burning, coal combustion, vehicle emission and road dust contributed to OC and EC in PM2.5 in Anshan city.
张伟, 姬亚芹, 李金, 孙洪峰, 李树立, 赵杰, 王士宝, 王伟. 鞍山市夏冬季PM2.5中碳组分化学特征及来源解析[J]. 中国环境科学, 2017, 37(5): 1657-1662.
ZHANG Wei, JI Ya-qin, LI Jin, SUN Hong-feng, LI Shu-li, ZHAO Jie, WANG Shi-bao, WANG Wei. The characteristics and source apportionment of carbon fractions in PM2.5 during summer-winter period in Anshan City. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(5): 1657-1662.
Wang Q Q, Huang X H H, Zhang T, et al. Organic tracer-based source analysis of PM2.5, organic and elemental carbon: A case study at Dongguan in the Pearl River Delta, China [J]. Atmospheric Environment, 2015,118:164-175.
[2]
Jacobson M Z. Strong radiative heating due to the mixing state of black carbon in atmospheric aerosols [J]. Nature, 2001,409:695-697.
Cruz C.N, Pandis S N. A study of the ability of pure secondary organic aerosol to act as cloud condensation nuclei [J]. Atmospheric Environment, 1997,31(15):2205-2214.
Meng Z Y, Jiang X M, Yan P, et al. Characteristics and sources of PM2.5 and carbonaceous species during winter in Taiyuan, China [J]. Atmospheric Environment, 2007,41(32):6901-6908.
Chow J C, Watson J G, Lu Z, et al. Descriptive analysis of PM2.5, and PM10, at regionally representative locations during SJVAQS/AUSPEX [J]. Atmospheric Environment, 1996,30(12):2079-2112.
Turpin B J, Huntzicker J J. Identification of secondary organic aerosol episodes and quantitation of primary and secondary organic aerosol concentrations during SCAQS [J]. Atmospheric Environment, 1995,29(23):3527-3544.
Chow J C, Watson J G, Kuhns H, et al. Source profiles for industrial, mobile, and area sources in the Big Bend Regional Aerosol Visibility and Observational study [J]. Chemosphere, 2004,54(2):185-208.
[31]
Li W, Bai Z. Characteristics of organic and elemental carbon in atmospheric fine particles in Tianjin, China [J]. Particuology, 2009,7(6):432-437.