我国二噁英污染水平和环境归趋模拟  

Pollution Situation and Environmental Fate of PCDD/Fs in China

作　　者：刘淑芬[1] 田洪海[2] 任玥[2] 陆勇[1] 刘爱民[2] 杜兵[2] 周志广[2] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]国家环境分析测试中心,国家环境保护二[口恶]英污染控制重点实验室,北京100029

出　　处：《环境科学研究》2010年第3期261-265,共5页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划(973)项目(2009CB421602)

摘　　要：运用LevelⅢ逸度模型,研究了我国环境介质中二噁英的平均浓度水平和迁移规律.比较不同尺度下的模拟结果表明,LevelⅢ逸度模型可以应用于较大尺度的研究.数据显示,虽然我国二噁英排放总量较大,但是环境介质中TEQ(指二噁英毒性当量质量浓度)平均值仍处于较低水平,大气中TEQ平均值仅为4.26～15.10fgxA3,土壤中TEQ平均值为0.0135～0.1150pgg,沉积物中TEQ平均值为0.445～2.300pgg.达到稳态时二噁英的外界输入影响较大,且主要的迁移过程是从大气到土壤.Levels and fates of dioxins in the environment are simulated by the level Ⅲ fugacity model,based on the dioxin release inventory of China.Comparing the results at different scales,we find that the level Ⅲ fugacity model can be used for large scale simulation.It shows that dioxin concentrations in environmental media are still fairly low,although the total release amount of dioxins in China is higher than that in most other countries.The average TEQ concentrations in air,soil and sediment are 4.26-15.10 fg/m3,0.0135-0.1150 pgxA 1/g and0.445-2.300p gxA1ectively.The inflow of dioxins through the atmosphere is the major contributor instead of the local sources,and soil is the main sink of dioxins.

关 键 词：二噁英 逸度模型 TEQ平均值 环境归趋 

分 类 号：X821[环境科学与工程—环境工程]