Particulate and Trace Gas Emissions from Open Burning of Wheat Straw and Corn Stover in China
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- 作者：Xinghua Li ; Shuxiao Wang ; Lei Duan ; Jiming Hao ; Chao Li ; Yaosheng Chen ; Liu Yang
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：September 1, 2007
- 年：2007
- 卷：41
- 期：17
- 页码：6052 - 6058
- 全文大小：145K
- 年卷期：v.41,no.17(September 1, 2007)
- ISSN：1520-5851
文摘
Field measurements were conducted to determineparticulate emissions and trace gas emissions, includingCO2, CO, CH4, NMHCs, NOx, NH3, N2O, and SO2, from openburning of wheat straw and maize stover, two majoragricultural residues in China. The headfire ignition techniquewas adopted, and sampling was performed downwindfrom the agricultural fire. Particulate matter (PM) and gasemission factors were determined using the carbon mass-balance method. Particle mass size distributions showa prominent accumulation mode peak at 0.26-0.38 
m.Submicron particles dominate PM emissions. Most measuredchemical species measured show a similar size distributionas PM. Chemical composition analysis indicates thatPM2.5 is largely composed of carbon, K, and Cl. PM2.5emission factors of wheat straw and maize stover are 7.6± 4.1 g/kg and 11.7 ± 1.0 g/kg, respectively. It alsoindicates that 12.1-24.2% of N in biomass is released asnitrogen-based trace gases and 11.0-24.9% of fuel S is emittedas SO2.
m.Submicron particles dominate PM emissions. Most measuredchemical species measured show a similar size distributionas PM. Chemical composition analysis indicates thatPM2.5 is largely composed of carbon, K, and Cl. PM2.5emission factors of wheat straw and maize stover are 7.6± 4.1 g/kg and 11.7 ± 1.0 g/kg, respectively. It alsoindicates that 12.1-24.2% of N in biomass is released asnitrogen-based trace gases and 11.0-24.9% of fuel S is emittedas SO2.