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분광학적 방법을 이용한 바이오매스 연소 배출 유기 입자의 화학적

Characterization of fine organic aerosols from biomass burning emissions using FTIR method

Abstract 

Fresh PM2.5 smokes emitted from combustion of four biomass materials (pellet, palm fruit fiber (PFF), PKS, and sawdust) in a

laboratory-controlled environment were characterized using an attenuated total reflectance-fourier transform infrared

(ATR-FTIR) technique. In smoke samples emitted from combustion of pellets, PFF and PKS, which is being used as boiler fuels for

greenhouses in rural areas, the organic carbon/elemental carbon (OC/EC) ratios in PM2.5 were very high (14.0-35.5), whereas in

sawdust smoke samples they were significantly low (<4.0) due to the combustion method close to flaming combustion.
ATR-FTIR analysis showed that OH(3400-3250 cm-1), CH3(2958-2840 cm-1), CH2(2910 cm-1 and 2850 cm-1),
ketone(1726-1697 cm-1), C=C(1607-1606 cm-1 and 1515-1514 cm-1), lignin (1463-1462 cm-1 and 1430-1428 cm-1) and

–NO2(1360-1370 cm-1) peaks were identified in all biomass burning (BB) smoke samples. However, additional peaks appeared

depending on the type of biomass. Among the four types of biomass materials, an additional peak of the methylene group

CH3(2872-2870 cm-1) appeared only in PFF and PKS smoke samples, and a peak of C=O(1685 cm-1) was also confirmed. And in the

case of PKS smoke samples, a peak of aromatic C=C(1593 cm-1 and 1476 cm-1) that did not appear in other BB samples was

also observed. This indicates that the molecular structure of organic compounds emitted during BB differs depending on the type

of biomass materials. The results of this study are expected to provide valuable information to more specifically reveal the effect of

BB on PM2.5 collected in the atmospheric environment.

Key word

Biomass materials, Fresh PM2.5 smokes, ATR-FTIR, OC/EC, Organic molecular structures

▶출처 : Particle and Aerosol Research 제 17 권 제 4 호