Abstract:The removal of airborne PAHs, determined from atmospheric and precipitation samples, was observed during ten rain events from July to August in 2009. Concentrations of PAHs in rainwater were dominated in particle phase, with highest concentration in the 4-ring components. ∑16PAHs scavenging ratios for gaseous, particles and total air averaged at 3.9′102, 3.7′104 and 5.9′103, respectively. The PAHs removal from the atmosphere by precipitation occurred primarily in particle phase. The gaseous phase dominated the scavenging of low molecular weight components, while the particle phase dominated the scavenging of high molecular weight components. The total scavenging ratios of high molecular weight components were higher than those of low molecular weight components. Wet depositing efficiencies of PAHs for gaseous and particles were correlated with rain index.
叶友斌, 张巍, 胡丹, 欧浪波, 王学军. 城市大气中多环芳烃的降雨冲刷[J]. 中国环境科学, 2010, 30(7): 985-991.
YE You-Bin, ZHANG Wei, HU Dan, 欧Lang-Bo , WANG Xue-Jun. Scavenging of airborne polycyclic aromatic hydrocarbons by rainfall in urban area. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(7): 985-991.