Particle Size Distribution and Polycyclic Aromatic Hydrocarbons Emissions from Agricultural Crop Residue Burning
Particle Size Distribution and Polycyclic Aromatic Hydrocarbons Emissions from Agricultural Crop Residue Burning
复制标题
农作物秸秆燃烧的粒径分布和多环芳烃排放。
DOI：
10.1021/es1037904
复制
发表时间：
2011-07-01
影响因子：
11.4
通讯作者：
An, Zhisheng
中科院分区：
文献类型：
--
作者：
Zhang, Hefeng;Hu, Dawei;An, Zhisheng
通过实验室测量，研究了中国地区三种主要农作物秸秆--稻草、小麦和玉米秸秆焚烧后的颗粒分布和多环芳烃排放。用宽范围粒子谱仪(WPS)测定了颗粒大小分布。同时采集了颗粒相和气相中的多环芳烃，并用GC-MS进行了分析。稻谷、小麦和玉米燃烧的气溶胶颗粒数粒度分布呈现明显的累积模式，其峰值分别位于0.10、0.15和0.15μm。稻草、小麦和玉米秸秆的PAHs排放因子分别为5.26、1.37和1.74 mg kg(-1)。结果表明，燃烧效率较高的燃烧具有颗粒尺寸小、多环芳烃排放因子低的特点。2004年，中国焚烧三种农作物残渣产生的多环芳烃排放总量估计为1.09千兆克。
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.