Concentrations and gas-particle partitioning of PCDD/Fs in the urban air of Dalian,China  

作　　者：QIN SongTao ZHU XiuHua WANG Wei CHEN JiPing NI YuWen LI XiaoXiao MU Jun Xu Qian SCHRAMM Karl-Werner 

机构地区：[1]School of Environmental and Chemical Engineering,Dalian Jiaotong University,Dalian 116028,China [2]Dalian hzstitute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Dalian Meteorological Observatory,Dalian 116001,China [4]Helmholtz Center Munich-German Research Center for Environmental Health,Molecular EXposomics(MEX),Ingolstgidter Landstr.1,85764 Neuherberg,Germany

出　　处：《Chinese Science Bulletin》2012年第26期3442-3451,共10页

基　　金：supported by the National Natural Science Foundation of China(20877011);the DAAD(German Academic Exchange Service) Scientific Research Visiting Scholarship,the National High Technology Research and Development Program of China(2011AA060604);the State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences (KF2009-17);the Key Laboratory of Industrial Ecology and Environmental Engineering,Ministry of Education of China(0802);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education of China

摘　　要：PCDD/Fs in the urban air of Dalian,China were monitored with high-volume active sampler from November 2009 to October 2010.The concentration of Cl 4-8 DD/Fs ranged from 3065 to 49538 fg m-3,with an average of 10249 fg m-3.The international toxic equivalents(I-TEQ) value of that was 61.8 1182 fg m-3,with an average of 235 fg m-3,which was comparable to those in the other urban locations around the world.It was found that the Cl 4 8 DD/Fs appeared to be present mainly in the particle phase during winter,spring and autumn,while during summer which were dominantly in gas phase.The ratio of Cl 4-8 DD/Fs present in particle phase increased with the increasing level of chlorination.The concentrations of PCDFs and PCDDs decreased with the increase of chlorinated level,while the concentrations of 2,3,7,8-PCDDs congeners increased with the increase of chlorination level.The homolog profiles of the concentrations of PCDFs presented were higher than those of the PCDDs,which indicated the PCDD/Fs pollution source of the air in Dalian was characteristic for thermal source pollution.The correlation analysis of meteorological parameters with the concentrations of Cl 4-8 CDD/Fs was conducted using SPSS packages,and it was found that the ambient temperature and atmospheric pressure were important factors influence the concentration of PCDD/Fs in the air.The respiratory risk and intake dioxins of the residents around the sampling sites were studied in the paper.It was found that Junge-Pankow model was much more accurate in predicting the gas-particle partitioning behavior of PCDD/Fs homologues during winter,while the Harner-Bidleman model shows better agreement with the measured data during winter and summer.PCDD/Fs in the urban air of Dalian, China were monitored with high-volume active sampler from November 2009 to October 2010. The concentration of C14_8DD/Fs ranged from 3065 to 49538 fg m-3, with an average of 10249 fg m-3. The international toxic equivalents （I-TEQ） value of that was 61.8-1182 fg m-3, with an average of 235 fg m-3, which was comparable to those in the other urban locations around the world. It was found that the C14_sDD/Fs appeared to be present mainly in the particle phase during winter, spring and autumn, while during summer which were dominantly in gas phase. The ratio of C14_8DD/Fs present in particle phase increased with the increasing level of chlorination. The concentrations of PCDFs and PCDDs decreased with the increase of chlorinated level, while the concentrations of 2,3,7,8-PCDDs congeners increased with the increase of chlorination level. The homolog profiles of the concentrations of PCDFs presented were higher than those of the PCDDs, which indicated the PCDD/Fs pollution source of the air in Dalian was characteristic for thermal source pollution. The correlation analysis of meteor- ological parameters with the concentrations of C14_8CDD/Fs was conducted using SPSS packages, and it was found that the am- bient temperature and atmospheric pressure were important factors influence the concentration of PCDD/Fs in the air. The respir- atory risk and intake dioxins of the residents around the sampling sites were studied in the paper. It was found that Junge-Pankow model was much more accurate in predicting the gas-particle partitioning behavior of PCDD/Fs homologues during winter, while the Harner-Bidleman model shows better agreement with the measured data during winter and summer.

关 键 词：PCDD 城市空气 气浓度 大连 中国 多氯代二苯并呋喃 分割 粒子 

分 类 号：X831[环境科学与工程—环境工程]