[Spatial distribution characteristics of carbonaceous aerosol during summer in Beibu Gulf Zone, China].
Daily (24-h average) PM2.5 samples were collected simultaneously at urban and suburban sites of nine cities (Nanning, Qinzhou, Fangchenggang, Beihai, Zhanjiang, Maoming, Haikou, Yangpu and Dongfang) in Beibu Gulf Zone during August 2009. All samples were analyzed for organic and elemental carbon (OC and EC) analyses by the thermal/optical reflectance following IMPROVE protocol. Characteristics of OC and EC concentration levels, spatial distribution, and the possible sources were discussed. The average concentrations of PM2.5, OC and EC in Beibu Gulf zone were (38.4 +/- 17.7), (9.2 +/- 2.6) and (1.9 +/- 1.1) microg x m(-3), respectively. The total carbonaceous aerosol (TCA) accounted for over 56.8% of PM2.5. OC mainly came from biomass burning and secondary organic carbon (SOC), while motor exhaust and industrial emissions were the primary source of EC during summer in Beibu Gulf Zone.
School of Chemical Engineering and Materials Science, Zhuhai Campus, Beijing Institute of Technology, Zhuhai 519088, China. yang_yihong@163.com
Yi-Hong
YH
Yang
South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China.
Jun
J
Tao
Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Jian
J
Gao
Guangxi Meteorological Service Center, Nanning 530022, China.
Xiong
X
Li
South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China.
Zhan
Z
Shi
South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China.
Bao-Xin
BX
Han
South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China.
Wen-Zhang
WZ
Xie
Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China.
Jun-Ji
JJ
Cao
D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D018533:Biomass; D002244:Carbon / Q000032:analysis*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D001335:Vehicle Emissions
D000336:Aerosols; D000393:Air Pollutants; D052638:Particulate Matter; D001335:Vehicle Emissions; D002244:Carbon