Particle Size Distribution and Polycyclic Aromatic Hydrocarbons Emissions from Agricultural Crop Residue Burning

Laboratory measurements were conducted to determine particle size distribution and polycyclic aromatic hydrocarbons (PAHs) emissions from the burning of rice, wheat, and corn straws, three major agricultural crop residues in China. Particle size distributions were determined by a wide-range particle...

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Bibliographic Details
Published in:Environmental science & technology 2011-07, Vol.45 (13), p.5477-5482
Main Authors: Zhang, Hefeng, Hu, Dawei, Chen, Jianmin, Ye, Xingnan, Wang, Shu Xiao, Hao, Ji Ming, Wang, Lin, Zhang, Renyi, An, Zhisheng
Format: Article
Language:English
Subjects:
Aerosols
Air Pollutants - analysis
Applied sciences
Atmospheric pollution
Characterization of Natural and Affected Environments
China
Combustion and energy production
Crop residues
Crops, Agricultural - chemistry
Emissions
Environmental science
Exact sciences and technology
Gas Chromatography-Mass Spectrometry
Incineration
Oryza
Oryza sativa
Particle Size
Pollution
Pollution sources. Measurement results
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - analysis
Refuse Disposal - methods
Rice
Spectrum Analysis
Triticum
Triticum aestivum
Zea mays
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Summary:Laboratory measurements were conducted to determine particle size distribution and polycyclic aromatic hydrocarbons (PAHs) emissions from the burning of rice, wheat, and corn straws, three major agricultural crop residues in China. Particle size distributions were determined by a wide-range particle spectrometer (WPS). PAHs in both the particulate and gaseous phases were simultaneously collected and analyzed by GC-MS. Particle number size distributions showed a prominent accumulation mode with peaks at 0.10, 0.15, and 0.15 μm for rice, wheat, and corn-burned aerosols, respectively. PAHs emission factors of rice, wheat, and corn straws were 5.26, 1.37, and 1.74 mg kg–1, respectively. It was suggested that combustion with higher efficiency was characterized by smaller particle size and lower PAHs emission factors. The total PAHs emissions from the burning of three agricultural crop residues in China were estimated to be 1.09 Gg for the year 2004.
ISSN:0013-936X
1520-5851
DOI:10.1021/es1037904