標題: Biomass burning tracers in rural and urban ultrafine particles in Xi'an, China
作者: Zhu, Chong-Shu
Cao, Jun-Ji
Tsai, Chuen-Jinn
Zhang, Zhi-Sheng
Tao, Jun
環境工程研究所
Institute of Environmental Engineering
關鍵字: Levoglucosan;Biomass burning;Ultrafine particles;Rural area;Xi'an
公開日期: 1-七月-2017
摘要: To investigate the impact of biomass burning emissions on ultrafine particles (PM0.133: particulate matter with an aerodynamic diameter less than 0.133 mu m), biomass burning tracers (including levoglucosan, mannonsan and K+) were measured at a rural and an urban sites in Xi'an during winter heating period. The average levoglucosan concentrations of rural and urban PM0.133 were 0.93 +/- 0.32 mu g m(-3) and 0.29 +/- 0.14 mg m(-3), respectively. Comparable PM0.133 mannosan concentrations were observed in rural samples (0.16 +/- 0.26 mu g m(-3)) and urban samples (0.17 +/- 0.10 mu g m(-3)). Higher correlation between levoglucosan and K+ was obtained for urban samples (R = 0.86) than that for rural samples (R = 0.72). The levoglucosan to K+ ratio was found to be higher for rural samples (0.77 +/- 0.39) compared to that for urban samples (0.32 +/- 0.14). Levoglucosan to mannosan ratios averaged 7.86 and 2.83 for rural and urban samples, respectively. It can be concluded that the major source of rural biomass burning was the combustion of crop residuals and softwood. The contributions of biomass burning to OC ranged from 19% to 32%, with an average of 24% for rural samples. The results provide a better understanding on the rural and urban magnitude of levoglucosan and contributions of biomass burning in Xi'an. (C) 2017 Turkish National Committee for Air Pollution Research and Control. Production and hosting by Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.apr.2016.12.011
http://hdl.handle.net/11536/144196
ISSN: 1309-1042
DOI: 10.1016/j.apr.2016.12.011
期刊: ATMOSPHERIC POLLUTION RESEARCH
Volume: 8
起始頁: 614
結束頁: 618
顯示於類別:期刊論文