Chemical composition of water-soluble ions in smoke from leaf combustion
LIU Gang, LI Jiu-hai, XU Hui, WU Dan, CHEN Hui-yu, YANG Wei-zong
Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Water-soluble ions in particulate matter (PM) from leaf combustion were determined. The results showed that Cl-, SO42-, Na+, NH4+, K+, and Mg2+ existed in flaming PM from green leaves. The average content of total water-soluble ions was 45.02g/kg. Cl-, SO42-, and K+ were the major components. The mean emission factor (EF) for the total ions was 2.43g/kg. The ion types in smoldering PM from green leaf combustion were similar to those in flaming PM, except that NO3- was found instead of SO42-. The mean content for the total ions was 9.95g/kg. The main constituents were Cl- and NH4+. The mean EF for the all ions was 1.04g/kg. Ca2+ occurred in flaming PM from fallen leaves besides the ions found in flaming PM from green leaves. The average content of the total ions was 56.40g/kg. Their major components were Cland SO42-. In addition, the mean EF of the all ions was 0.96g/kg. The types of ions found in smoldering PM from fallen leaves were the same as in flaming PM. The mean content of the ions was 16.86g/kg. SO42- was the main component. The mean EF for the total ions was 1.43g/kg. Both contents in PM and EFs for most of the ions from green or fallen leaves varied with leaf types while burned under each condition. Flaming combustion was in favor of ion emission relative to smoldering one for green leaves. The situation was just opposite for fallen leaves.
刘刚, 李久海, 徐慧, 吴丹, 陈惠雨, 杨伟宗. 树叶燃烧排放烟尘中水溶性离子的组成[J]. 中国环境科学, 2017, 37(12): 4480-4486.
LIU Gang, LI Jiu-hai, XU Hui, WU Dan, CHEN Hui-yu, YANG Wei-zong. Chemical composition of water-soluble ions in smoke from leaf combustion. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4480-4486.
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