Wang X L, Tao S, Xu F L, Dawson R W, Cao J, Li B G, Fang J Y
Department of Urban and Environmental Sciences, Peking Univ., Beijing, China.
J Environ Qual. 2002 May-Jun;31(3):896-903. doi: 10.2134/jeq2002.8960.
A Level III fugacity model was applied to characterize the transfer processes and environmental fate of benzo[a]pyrene in wastewater-irrigated areas of Tianjin, China. The physical-chemical properties and transfer parameters of benzo[a]pyrene were used in the model and the concentration distribution of benzo[a]pyrene in sediment, soil, water, air, fish, and crop compartments, as well as transfer fluxes across the compartments, were then derived under steady-state assumptions. The calculated results were compared with monitoring data for air, soil, water, and sediment collected from the literature. The results indicate that there was generally good agreement and the differences were within an order of magnitude for air, soil, and sediment. The concentration of benzo[a]pyrene in the ambient air in the area was very low with a majority present sorbed to aerosol. In the water compartment, approximately 70% of benzo[a]pyrene dissolved in water phase. Relatively high concentrations of the compound were found in the soil and sediment, with the soil serving as the dominant sink in the area. Benzo[a]pyrene, with a slow metabolic rate, was found to accumulate in fish in the area.
应用三级逸度模型来表征中国天津污水灌溉区苯并[a]芘的迁移过程和环境归宿。该模型使用了苯并[a]芘的物理化学性质和迁移参数，然后在稳态假设下推导了苯并[a]芘在沉积物、土壤、水、空气、鱼类和作物隔室中的浓度分布，以及各隔室间的迁移通量。将计算结果与文献中收集的空气、土壤、水和沉积物的监测数据进行了比较。结果表明，总体上吻合良好，空气、土壤和沉积物的差异在一个数量级以内。该地区环境空气中苯并[a]芘的浓度非常低，大部分吸附在气溶胶上。在水相中，约70%的苯并[a]芘溶解于水。在土壤和沉积物中发现该化合物的浓度相对较高，土壤是该地区的主要汇。苯并[a]芘代谢速率缓慢，在该地区的鱼类中发现有积累。
