杀虫剂十氯酮的多介质环境行为模拟

Simulation of transport and degradation of pesticide chlordecone in air,water,sediments,and soil

应用EQC模型模拟十氯酮在多介质环境中的归宿和迁移通量。结果表明:土壤是十氯酮最大的贮存库,在稳态平衡条件下,残留率达到95.0%;在稳态非平衡条件下,十氯酮单独排放到水体,有37.5%残留在于排放的水体中,其在大气的浓度水平和质量分布均很低,在沉积物中的质量则来自于水体向沉积物的沉降迁移;十氯酮主要通过水体的水平迁移和土壤的厌氧降解输出;十氯酮的主要界面迁移过程是大气向土壤的迁移,其次是水体向沉积物的沉降和大气向水体的迁移。

The fate and transport fluxes of chlordecone in air, water, sediment and soil were estimated using the Equilibrium Criterion （EQC） model. Results show that soil is the dominant sink of chlordecone. Under steady state and equilibrium conditions, 95.0% of chlordecone will remain in soil. Under steady state and non-equilibrium conditions, both residual concentrations and amounts of chlordecone left in air and water are very low except that about 37.5% of it remains in the compartments where it is released. Chlordecone in the sediment comes from the water phase. Advective transport in the water and degradation in soil are important means for the distribution chlordecone. Among the interracial transport processes, transfer from air to soil is the most important, followed by water to sediment and transfer from air to water.