引用本文:齐丽,周志广,许鹏军,李楠,任玥,刘爱民,黄业茹,等.北京地区二噁英类的环境多介质迁移和归趋模拟[J].环境科学研究,2012,25(5):543-548.
QI Li,ZHOU Zhi-guang,XU Peng-jun,LI Nan,REN Yue,LIU Ai-min,HUANG Ye-ru,et al.Simulation of the Transfer and Fate of PCDD/Fs in Beijing Using a Steady-State Multimedia Fugacity Model[J].Reserrch of Environmental Science,2012,25(5):543-548.]
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北京地区二噁英类的环境多介质迁移和归趋模拟
齐丽, 周志广, 许鹏军, 李楠, 任玥, 刘爱民, 黄业茹
国家环境分析测试中心,国家环境保护二噁英污染控制重点实验室
摘要:
以二噁英类为研究对象,利用LevelⅢ多介质逸度模型模拟计算了稳态假设下二噁英类在北京地区空气相、水相、土壤相和沉积物相中的浓度分布及各相间的迁移通量.结果表明:二噁英类在空气和土壤相中的模拟输出浓度(以I-TEQ计,全文同)范围分别为0.32~0.34 pg/m3和0.33~1.14 ng/kg,而相应环境相中的实测值分别为0.33 pg/m3和1.48 ng/kg,二者吻合较好,验证了该模型在北京地区的适用性;北京地区二噁英类的主要迁移过程为空气相—土相沉降和空气相—水相沉降.土壤和大气降解是二噁英类的主要消亡途径,二者占总降解量的99.1%.土壤相是二噁英类的最大储库,其占总量的97.8%.
关键词:  多介质逸度模型  二噁英类  毒性当量浓度  迁移通量  灵敏度分析  不确定性
DOI:
分类号:X502
基金项目:国家重点基础研究发展计划(973)项目(2009CB421602);国家环境保护公益性行业科研专项(200709057)
Simulation of the Transfer and Fate of PCDD/Fs in Beijing Using a Steady-State Multimedia Fugacity Model
QI Li, ZHOU Zhi-guang, XU Peng-jun, LI Nan, REN Yue, LIU Ai-min, HUANG Ye-ru
State Environmental Protection Key Laboratory of Dioxin Pollution Control,National Research Center for Environmental Analysis and Measurements,Beijing 100029,China
Abstract:
A multimedia fugacity model(Level Ⅲ) was used to simulate the concentration distribution and transfer fluxes of PCDD/Fs in air,water,soil and sediment in Beijing,China.The results showed that the output concentrations of PCDD/Fs ranged from 0.32 to 0.34 pg/m3 in air and from 0.33 to 1.14 ng/kg in soil.This was in good agreement with the observed concentrations of 0.33 pg/m3 and 1.48 ng/kg in the corresponding environments.The results verified the applicability of this model for the Beijing area.The main transfer processes of PCDD/Fs in Beijing were deposition from air to soil and diffusion from air to water.The degradation of PCDD/Fs in air and soil was found to be the major eliminating pathways for these chemicals,accounting for 99.1% of the total loss.Soil was the largest bulk reservoir of PCDD/Fs,containing 97.8% of total PCDD/Fs in the environment.
Key words:  multimedia fugacity model  dioxin  toxic equivalent concentration  transfer flux  sensitivity analysis  uncertainty