京杭运河杭州市区段表层沉积物中二噁的分布  

The Distribution of PCDD/Fs in Sediments of Great Canal,Hangzhou

作　　者：徐旭[1] 陈彤[2] 姜普查[1] 梁国伟[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018 [2]浙江大学热能工程研究所能源洁净利用国家重点实验室,浙江杭州310027

出　　处：《中国环境监测》2008年第5期65-68,共4页Environmental Monitoring in China

基　　金：浙江省自然科学基金项目(Z505011)

摘　　要：采用同位素稀释-高分辨气质联用技术对京杭运河杭州市区段表层沉积物中二噁[口英]的分布进行研究。京杭运河杭州市区段表层沉积物中∑P4-8CDD／Fs的含量为108．7～513．124pg／g，毒性当量范围为1．788～4．777pgTEQ／g。研究发现，运河表层沉积物5处样品中二噁[口英]分布相似，17种2，3，7，8取代二噁[口英]基本上都有检出，OCDD占据主导地位，并且1，2，3，4，6，7，8-HpCDD与OCDD的比值相近，表明沉积物中的二噁[口英]分布具有明显的交通燃烧源排放特征。The PCDD/Fs in surface sediments of Great Canal in Hangzhou city were analyzed by isotope Dilution HRGC/HRMS method. The total concentration range of ∑P4-s CDD/Fs was 108.7- 513. 124pg/g, and the range of TEQ （Toxic Equivalent quantity） value of PCDD/Fs was 1.788 ~ 4.777pg TEQ/g. There were similarities in the congener profile of sediments. Nearly 17 species of 2378 substituted PC DD/Fs were found in surface sediments. OCDD dominated total concentration of dioxins, but the relative ratio of 1,2,3,4, 6,7,8-HpCDD to OCDD was also quite similar. It showed that the dioxins in surface sediments of Great Canal in Hangzhou city had the evident characteristics of Diesel truck exhaust.

关 键 词：沉积物 高分辨气质联用 二噁[口英] 

分 类 号：X832[环境科学与工程—环境工程]