辽河口湿地苯并[a]芘的多介质归趋研究  

Study of Multimedia Transfer and Fate of benzo[a]pyrene in Liaohe Estuarine Wetland

作　　者：王敏杰[1] 郎印海[1] 程芳芳[1] 王楠楠[1] 

机构地区：[1]中国海洋大学环境科学与工程学院海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2012年第12期120-125,共6页Periodical of Ocean University of China

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07208-009);教育部新世纪优秀人才支持计划项目(NCET-10-0758)资助

摘　　要：利用LevelⅢ逸度模型对苯并[a]芘在辽河口湿地大气、水体、土壤、沉积物和植物中的分布进行模拟,通过灵敏度分析确定了模型的关键参数,并对模拟结果进行验证,成功模拟了各相中苯并[a]芘浓度分布,并根据模拟结果计算了各相间的迁移通量。结果表明:大气、水体、土壤、沉积物和植物中苯并[a]芘的浓度分别为7.79×10-11、2.52×10-6、6.32×10-4、1.10×10-3和1.51×10-8 mol/m3,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;土壤和沉积物是苯并[a]芘最主要的储库,占区域总量的94.0%;大气和水的平流输入是该区域苯并[a]芘的主要来源,占总输入量的99.3%,大气和水的平流输出是其损失的主要途径,占总输出量的92.8%;各相间迁移通量以水体向沉积物的迁移通量为最大,依次为沉积物向水体和大气向土壤的迁移。A level Ⅲ fugacity model was used to simulate the fate and transfer of benzo[a]pyrene in Liaohe estuarine wetland. The key model parameters were identified through sensitivity analysis, and the model results were verified. The established model was successfully to calculate the concentration distribution of benzo[a]pyrene in five environmental compartments, air, water, soil, sediment and plant in Liaohe estuarine wetland. Based on the simulation results, transfer flux among-phase was calculated. The results indicated that, the benzo[a]pyrene concentrations in air, water, soil, sediment and plant were 7.79×10^-11、2.52×10^-6、6.32×10^-4、1.10×10^-3 and 1.51×10^-8mol/m^3, respectively. The reliability of the model was verified by the coincidence of the calculated and the measured concentration in the same period. Soil and sediment were the major reservoirs of benzo[a]pyrene, accounting for 94.0% of the total amount. Advection inflows in air and water were the major sources of benzo[a]pyrene in this region, accounting for 99. 3 % of total. Advection outflows in air and water were the major way of disappearance in this area, accounting for 92.8% of total. Among all the＇transfer fluxes between the adjacent compartments, the transfer flux on the water-sediment surface is the largest, followed by the transfer flux on the sediment-water surface and the transfer flux on the air-soil surface.

关 键 词：辽河口湿地 苯并[A]芘 逸度模型 多介质迁移 

分 类 号：X131.3[环境科学与工程—环境科学]