巢湖水域四溴双酚A的多介质迁移与归趋模拟

运用Ⅲ级逸度模型，模拟并研究了不同水动力条件下四溴双酚A（TBBPA）在巢湖水-沉积物系统中各环境相的浓度、储量以及相间的迁移通量.结果表明：TBBPA在水相、再悬浮颗粒相和沉积物相中的模拟计算浓度与实测平均浓度吻合度较高，验证了模型的有效性，并通过灵敏度分析探讨了模拟关键参数.当系统达到平衡时，沉积物是TBBPA最大的储库（占系统总储量86%以上）.同时，由于较强的水动力条件会改变系统再悬浮特征以及降解半衰期等关键参数，进而降低了各环境相中TBBPA的浓度值，增加了水相和再悬浮颗粒相中的储量比例，并增加了水体-再悬浮颗粒、沉积物-再悬浮颗粒的相间交换通量.此外，TBBPA在巢湖水-沉积物系统中损失的主要途径为沉积物相的降解（占入湖总量87%以上）.

Simulation of multimedia transfer and fate of tetrabromobisphenol A in Lake Chaohu

A multimedia fugacity model (Level Ⅲ) was applied to simulate the concentration distribution, quantity distribution, and transfer fluxes of tetrabromobisphenol A (TBBPA) in four environmental compartments in Lake Chaohu under different hydrodynamic conditions. The results showed that the simulated concentration (water, suspended particulate matter (SPM) and sediment) can fit the observed concentration well, which indicated the effectiveness of the model. Moreover, the key model parameters were identified using sensitivity analysis method. When water-sediment system reached equilibrium, TBBPA was mainly stored in sediment (accounts for over 86% of TBBPA input). Meanwhile, the resuspension characteristics and TBBPA degradation were influenced by hydrodynamic disturbance, which reduced the TBBPA concentration significantly in each environmental compartment and increased the quantity distribution in water and SPM and the transfer fluxes (water-SPM and sediment-SPM). The TBBPA degradation in sediment was the major route in water-sediment system (over 87% of the total TBBPA).