中文摘要：

主要研究了大连大气中多氯联苯（PCBs）在采暖期与非采暖期的气粒分配行为．利用大流量主动采样仪对大连市大气样品进行采样，测定了大连大气中PCBs在气相与颗粒相中的组成、浓度，计算了PCBs的气粒分配系数（K），研究了K与环境温度、PCBs的过冷液体蒸汽压及其正辛醇．空气分配系数的相关性．并采用实测数据，研究了两种气粒分配模型（Junge-Pankow模型、Harner-Bidleman模型）对大连市大气中PCBs气粒分配行为的预测效果．结果表明，在采暖期，除PCB#28、52以外，其他PCBs在颗粒相中的浓度均高于在气相中的浓度；在非采暖期，PCBs在气相中的浓度高于颗粒相中的浓度；PCBs的气粒分配系数与环境温度、其过冷液体蒸汽压和正辛醇-空气分配系数均有良好的线性相关性；Junge．Pankow吸附模型和Harner-Bidleman吸收模型都可用于大致描述PCBs的气／粒分配行为．

英文摘要：

In order air of Dalian to study the gas-particle partitioning behavior of during the heating and non-heating periods, polychlorinated biphenyls （PCBs） in the urban the air was sampled with high-volume active sampler. The composition and concentration of atmospheric PCBs in the gas phase and particle phase were measured. The gas-particle partition coefficients （Kp） of PCBs were calculated. The correlation of Kp with the ambient temperature, the subcooled liquid vapor pressure and the octanol-air partition coefficient of PCBs were studied. The prediction effects of the two gas-particle partitioning models （ Junge-Pankow model and Harner- Bidleman model） were verified with the measured data. The results showed that the concentration of PCBs in the particle phase were higher than that in the gas phase except PCB# 28 and 52 during the heating period. The concentrations of PCBs in the gas phase were all higher than that in the particle phase during the non-heating period. The gas-particle partition coefficient of PCBs had good linear correlation with the ambient temperature, the subcooled liquid vapor pressure and the octanol-air partition coefficient of PCBs. Junge-Pankow adsorption model and Harner-Bidleman adsorption model both can be used to describe the gas-particle partitioning behavior of the air PCBs.