北京东南郊大气TSP中多环芳烃浓度特征与影响因素

对2005-03～2006-01北京市东南郊3个采样点大气总悬浮颗粒物（TSP）样品进行分析,总结了研究区内TSP以及TSP中16种PAHs的浓度特征和季节变化规律.研究区内16种PAHs浓度总和的范围在0.29～1?184.48 ng/m³之间,均值为239.44 ng/m³;分别用气象参数（温度、风速、气压、相对湿度）和大气API指数（二氧化硫、二氧化氮、PM₁₀）与PAHs浓度进行了偏相关分析,结果表明温度和SO₂的API指数与PAHs浓度相关显著,应用逐步回归方法得到PAHs对气象参数和大气API指数的回归方程,分别为∑16PAHs=572.56-23.18t和∑16PAHs=5.99 SO₂,可以利用温度和SO₂的API指数对PAHs浓度进行估算.

Concentration Characteristics and Influencing Factors of Atmospheric Polycyclic Aromatic Hydrocarbons in TSP in the Southeastern Suburb of Beijing, China

ATSP samples were collected at three sampling sites in the southeastern suburb of Beijing from March, 2005 to January, 2006. The samples were analyzed for TSP and sixteen PAHs. The concentrations and seasonal changes of TSP and sixteen PAHs were illustrated. Concentrations of sigma 16PAHs range from 0.29 - 1 184.48 ng/m3, and the average value is 239.44 ng/m3. Partial correlation analysis was applied to investigate the influence of meteorological parameters (temperature, wind speed, air pressure and relative humidity) and air pollution indexes (SO2, NO2 and PM10) on PAHs concentrations. Finally, quantitative estimation equations between PAHs and meteorological parameters and air pollution indexes were put forward by applying stepwise linear regression method, and the equations are sigma 16PAHs = 572.56 - 23.18 t and sigma 16PAHs = 5.99 SO2, respectively. Concentration of PAHs could be estimated using temperature or API of SO2.