Particle Size Distribution and Polycyclic Aromatic Hydrocarbons Emissions from Agricultural Crop Residue Burning Hefeng Zhang Dawei Hu Jianmin Chen Xingnan Ye Shu Xiao Wang Ji Ming Hao Lin Wang Renyi Zhang Zhisheng An 10.1021/es1037904.s001 https://acs.figshare.com/articles/journal_contribution/Particle_Size_Distribution_and_Polycyclic_Aromatic_Hydrocarbons_Emissions_from_Agricultural_Crop_Residue_Burning/2634757 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<sup>–1</sup>, 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. 2011-07-01 00:00:00 Agricultural Crop Residue BurningLaboratory measurements PAHs emission factors WPS Particle number size distributions crop residues wheat particle size distribution Polycyclic Aromatic Hydrocarbons Emissions Particle size distributions Particle Size Distribution 0.15 μ m corn straws