Back to Search
Start Over
Effects of combustion condition and biomass type on the light absorption of fine organic aerosols from fresh biomass burning emissions over Korea
- Source :
- Environmental Pollution. 265:114841
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this study, the light absorption properties of fine organic aerosols from the burning emissions of four biomass materials were examined using UV-spectrophotometry and Aethalometer-measurements, respectively. For wood chips and palm trees, the burning experiments were carried out with different combustion temperatures (200, 250, and 300 οC) in an adjustable, electrically heated combustor. The light absorptions of water and methanol extracts of aerosols, and smoke particles showed strong spectral dependence on the burning emissions of all biomass materials. However, the burning aerosols of wood chips showed stronger absorption than those of the other biomass burning (BB) emissions. For the burning aerosols of wood chips and palm trees, organic carbon/elemental carbon (OC/EC) decreased as the combustion temperature increased from 200 to 300 °C. Absorption Angstrom exponent (AAE) values tended to decrease when combustion temperature increased for smoke aerosols and methanol extracts in smoke samples. The mass absorption efficiency at 365 nm (MAE365, m2 g−1∙C−1) of water- and methanol-extractable OC fractions was highest in wood chip burning smoke samples. MAE365 values of methanol extracts for rice straw, pine needles, wood chips, and palm trees burning emission samples were 1.35, 0.92, 2.36–3.37, and 0.86–1.42, respectively. For wood chip and palm tree burning emissions, AAE320–430nm values of methanol extracts were strongly correlated with OC/EC (i.e., combustion temperature) with slopes of 0.11 (p
- Subjects :
- 010504 meteorology & atmospheric sciences
Health, Toxicology and Mutagenesis
Biomass
010501 environmental sciences
Toxicology
Combustion
01 natural sciences
chemistry.chemical_compound
Republic of Korea
Absorption (electromagnetic radiation)
Biomass burning
0105 earth and related environmental sciences
Aerosols
Total organic carbon
Smoke
Air Pollutants
General Medicine
Pollution
Carbon
chemistry
Environmental chemistry
Combustor
Environmental science
Particulate Matter
Methanol
Environmental Monitoring
Subjects
Details
- ISSN :
- 02697491
- Volume :
- 265
- Database :
- OpenAIRE
- Journal :
- Environmental Pollution
- Accession number :
- edsair.doi.dedup.....a6a188acd04831834a6b9a49ffdc9624