大连大气中多氯联苯的气粒分配行为  

The gas-particle partitioning behavior of PCBs in the air of Dalian SHI Taian

作　　者：施泰安 朱秀华[1] 许倩[1] 陈吉平[2] 倪玉文 王炜[3] 穆军[3] 

机构地区：[1]大连交通大学,环境与化学工程学院,大连116028 [2]中国科学院大连化学物理研究所,大连116023 [3]大连交通大学环境与化学工程学院,大连116028

出　　处：《环境化学》2013年第10期1874-1884,共11页Environmental Chemistry

基　　金：国家自然科学基金项目(20877011);国家高技术研究发展计划(863)项目(2011AA060604);环境化学与生态毒理学国家重点实验室开放课题基金项目(KF2009-17);工业生态与环境工程教育部重点实验室开放课题基金项目(0802);教育部留学回国人员科研启动基金项目资助

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 p),研究了K p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.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.

关 键 词：大气 多氯联苯 气粒分配系数 正辛醇一空气分配系数 气固分配 大连 

分 类 号：X831[环境科学与工程—环境工程]