青海瓦里关大气中多环芳烃的研究

Studies on polycyclic aromatic hydrocarbons in the atmosphere of Waliguan,Qinghai

2005年4月2日-5月23日，对瓦里关大气中的气相和颗粒相多环芳烃（PAHs）进行了连续观测．结果表明，总PAHs浓度为7．43-29．96ng／m^3,气相PAHs的浓度为7．01-26．10ng／m^3,颗粒相PAHs的浓度为0．28—7．84ng／m^3,气相中PAHs占总浓度的66．5％。98.8％．气粒分配系数（Kp）与过冷饱和蒸汽压（PL^0）呈良好相关性（R^2=0．67—0．92）．斜率（mr）均＞-1．瓦里关大气中PAHs的浓度受温度、风速、大气逆温层，大气长距离迁移等因素的影响．

The gas phase and particle phase polycyclic aromatic hydrocarbons （PAHs） in the atmosphere of Waliguan were investigated consecutively from April 2 to May 23, 2005 year. The total PAIRs concentration was 7.43-29.96ng/m^3. The gas phase PAHs concentration was 7.01-26.10ng/m^3, the particle phase PAHs concentration was 0.28-7.84ng/m^3, the gas phase PAHs occupied 66.5%-98.8% of the total concentration. The gas-particle partitioning coefficient （Kp） presented good relation with sub-cooled saturation vapor pressure （PL^0） （R^2=0.67-0.92）, slop （mr） all〉-1. The PAHs concentration in the atmosphere of Waliguan was influenced by the factors of temperature, wind speed, atmospheric temperature inversion layer and atmospheric long-range transport.