兰州地区苯并(a)芘的环境多介质迁移和归趋模拟  

Simulation of multi-media transfer and fate of benzo[a]pyrene in Lanzhou Region

作　　者：董继元[1] 王式功[2] 高宏[1] 姚焕炬[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000 [2]兰州大学大气科学学院,甘肃兰州730000

出　　处：《生态环境》2008年第6期2150-2153,共4页Ecology and Environmnet

基　　金：国家自然科学基金项目(40675077);国家"十一五"科技支撑计划项目(2007BAC03A10)

摘　　要：利用LevelIII逸度模型模拟计算了稳态假设下苯并(a)芘在兰州地区大气、水体、土壤和沉积物中的相间迁移通量、浓度分布。结果表明:大气的平流输入和化石燃料燃烧是该区域苯并(a)芘的主要来源,土壤是其最大的储库,占总残留量的99.6%;在大气、水体、土壤和沉积物中的浓度分别为1.61×10-10mol·m-3、9.39×10-7mol·m-3、7.13×10-4mol·m-3和9.17×10-5mol·m-3,模型计算浓度与同期实测浓度吻合较好,验证了模型的可靠性,并通过灵敏度分析,确定了模型的关键参数。A level Ⅲ fugacity model was applied to calculate the multi-interface transfer flux and concentration distribution of benzo[a]pyrene in air, water, soil and sediment in Lanzhou region under steady-state assumptions. The results indicated that： advection inflows in air and combustion of fossil fuel were the major sources of benzo[a]pyrene in this area, and soil was the largest storage of benzo[a]pyrene, accounting for 99.6% of the total amount of residual. The benzo[a]pyrene concentrations in air, water, soil and sediment were 1.61×10^-10 mol·m^-3, 9.39×10^-7mol·m^-3, 7.13×10^-4mol·m^-3 and 9.17×10^-5 mol·m^-3 respectively. The reliability of the model was verified by the coincidence of the calculated and the measured concentration in the same period. The key model parameters were identified through sensitivity analysis.

关 键 词：兰州地区 苯并(A)芘 多介质逸度模型 迁移 归趋 

分 类 号：X142[环境科学与工程—环境科学]