作　　者： ; ; ; ; (帅开敏）;

机构地区： 中国科学院广州地球化学研究所有机地球化学国家重点实验室

出　　处： 《中国环境监测》 2010年第4期23-27,共5页

摘　　要： 对广州天河区大气中二噁(口英)进行年度监测和气固分配模式的研究。结果表明,天河区大气中存在较高浓度的二噁(口英);低氯代二噁(口英)对毒性当量贡献较大,其主要分布在气相,2,3,4,7,8-PeCDF对毒性当量贡献最大,其贡献超过35%;高氯代二噁(口英)(主要是OCDF、OCDD、1,2,3,4,6,7,8-HpCDF和1,2,3,4,6,7,8-HpCDD)对浓度贡献较大,其主要分布在颗粒相。 The occurrence of polychlorinated dibenzo-p-dioxins and dibenzofurans（PCDD /Fs） in the atmosphere of Tianhe District in Guangzhou was investigated annually.Meanwhile,gas-particle partitioning of PCDD /Fs was also examined in this study.The results showed that PCDD /Fs were ubiquitous in the atmosphere of Tianhe District with high concentrations.Lowchlorinated PCDD /Fs were mainly found in gaseous phase with a high contribution to the overall toxic equivalency quantity（TEQ）.Of all congeners we analyzed,2,3,4,7,8-PeCDF was the highest TEQ contributor,which accounting for more than 35% for the total.For high-chlorinated PCDD /Fs,the OCDF,OCDD,1,2,3,4,6,7,8-HpCDD,and 1,2,3,4,6,7,8-HpCDF were the main congeners,which were found in the particulate phase frequently.

关 键 词： 二噁 口英 大气 气固分配

领　　域： [环境科学与工程]