Carbon characteristics and elemental carbon isotopic compositions in biomass indoor combustion products
SHEN Xiao-yu1,2, GUO Zhao-bing1,2, JIANG Wen-juan1,2, WANG Jin-jin1,2, BAI Yang1,2, REN Jie1,2
1. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China
The typical kinds of biomass (rice straw, reeds straw, corn stalk, phoenix, osmanthus and magnolia leaves) in Nanjing were collected to conduct indoor combustion experiments. The concentrations of organic carbon (OC) and elemental carbon (EC) in the particles collected from biomass combustion were analyzed using Model 2001A Thermal Optical Carbon Analyzer,and isotopic compositions of EC were determined by EA/IRMS synchronously. The results showed that the emission factor of OC during biomass combustion reached the maximum at the scope <0.43μm except reeds straw while EC emission factor reached the maximum at the scope <0.43μm and 0.43~0.65μm except phoenix and osmanthus leaves. Among which, the emission factors of OC and EC of corn stalk were the highest. All the mass concentrations of OC and EC in biomass combustion products were the highest at the particle size less than 0.43μm. Besides, the isotopic compositions of EC in smoke and ashes from corn stalk combustion were higher compared with those from other biomass combustion. In addition to biomass components, the high temperature during biomass combustion might lead to carbon isotopic fractionation.
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