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

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• 作者：Hefeng Zhang ; Dawei Hu ; Jianmin Chen ; Xingnan Ye ; Shu Xiao Wang ; Ji Ming Hao ; Lin Wang ; Renyi Zhang ; Zhisheng An
• 刊名：Environmental Science & Technology
• 出版年：2011
• 出版时间：July 1, 2011
• 年：2011
• 卷：45
• 期：13
• 页码：5477-5482
• 全文大小：858K
• 年卷期：v.45,no.13(July 1, 2011)
• ISSN：1520-5851

文摘

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 渭m 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^鈥?, 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.