Characteristics of carbonaceous components in particulate exhausted from biomass boilers in Nanning
MA Tong1, CHEN Jia-bao2, WEI Jin-jin2, TIAN Ying-ze1, CHEN Gang1, SHI Guo-liang1, FENG Yin-chang1
1. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
2. The Environmental Protection Monitoring Station in Nanning, Nanning 530012, China
Characteristics of the carbon components and the particle size distribution of the particulate matter emitted from the biomass boiler were studied by collecting PM10 and PM2.5.The organic carbon (OC) and elemental carbon (EC) in the sample were determined by the thermal/optical reflectance (TOR), the quantity of char-EC and soot-EC were obtained. The results showed that different removal ways of dust had significant effects on OC and EC quantity in particulate matter discharged from biomass boiler. The value of OC/EC and char-EC/soot-EC as indicators of identification of source were 1.4±0.4 and 35.7±16.5 respectively in PM10, 2.2±1.3 and 15.5±10.3 in PM2.5 respectively in the bag dust removal samples. The 10 value of OC/EC and char-EC/soot-EC in cyclone dust samples of were 6.1±1.9 and 5.2±2.5, and the PM2.5 were 6.5±2.0 and 2.5±2.3 respectively. For carbon fractions:OC1~OC4, EC1~EC3 and OPC analysis, the percentage of EC1in TC was the highest in the bag dust removal samples. The cyclone dust samples of relative contents of OC1~OC3 in TC were higher than others. This study also showed that OC2, OC3 and EC2 were mainly concentrated in PM2.5, OC4, ECl and EC3 mainly in PM10.
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