Cheng Jing-O, Ko Fung-Chi, Lee Chon-Lin, Fang Meng-Der
National Museum of Marine Biology and Aquarium, Pingtung, Taiwan.
Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Environ Sci Pollut Res Int. 2016 Aug;23(15):15675-88. doi: 10.1007/s11356-016-6751-9. Epub 2016 May 2.
The concentrations and gas-particle partitioning of atmospheric polycyclic aromatic hydrocarbons (PAHs) were intensively measured in the Hengchun Peninsula of southern Taiwan. The concentrations of total PAH (Σ38PAH), including gas and particle phases, ranged from 0.85 to 4.40 ng m(-3). No significant differences in the PAH levels and patterns were found between the samples taken at day and at night. The gas phase PAH concentrations were constant year-round, but the highest levels of particle-associated PAHs were found during the northeast monsoon season. Long-range transport and rainfall scavenging mechanisms contributed to the elevated levels in aerosols andΣ38PAH concentrations. Results from principal component analysis (PCA) indicated that the major sources of PAHs in this study were vehicular emissions. The back trajectories demonstrated that air mass movement driven by the monsoon system was the main influence on atmospheric PAH profiles and concentrations in the rural region of southern Taiwan. Gas-particle partition coefficients (K p ) of PAHs were well-correlated with sub-cooled liquid vapor pressures (P (o) L ) and demonstrated significant seasonal variation between the northeast (NE) and the southwest (SW) monsoon seasons. This study sheds light on the role of Asian monsoons regarding the atmospheric transport of PAHs.
对台湾南部恒春半岛大气中的多环芳烃（PAHs）浓度和气粒分配情况进行了密集测量。包括气相和颗粒相在内的总PAH（Σ38PAH）浓度范围为0.85至4.40 ng m(-3)。白天和夜间采集的样本在PAH水平和模式上未发现显著差异。气相PAH浓度全年恒定，但与颗粒相关的PAHs最高水平出现在东北季风季节。长距离传输和降雨清除机制导致了气溶胶中PAHs水平升高以及Σ38PAH浓度升高。主成分分析（PCA）结果表明，本研究中PAHs的主要来源是车辆排放。后向轨迹表明，季风系统驱动的气团移动是影响台湾南部农村地区大气PAH分布和浓度的主要因素。PAHs的气粒分配系数（K p）与过冷液体蒸气压（P (o) L）高度相关，并且在东北（NE）和西南（SW）季风季节之间表现出显著的季节变化。本研究揭示了亚洲季风在PAHs大气传输方面的作用。
