不同pH条件下沉积磷释放到水体中化学行为的模拟研究

通过室内模拟湖泊沉积物在不同pH条件下，研究释放到水体中各种磷形态的迁移转化行为，结果表明：碱性条件和酸性条件下，水体磷的时空变化由于其释放机制的不同，其迁移转化行为各不相同，同时，pH值的变化对水体中各种磷的相互转化没有明显的作用，各种磷形态的浓度变化，在很大程度上取决于水体中总磷的浓度。研究结果对认识沉积磷在环境条件变化时，磷在沉积物和水体体系中的迁移转化有重要的意义。

Simulation Study on Behaviors of Sediment Phosphorus Releasing to Water Body under Different pH in Laboratory

Under the different pH conditions, the migration and transformation behavior of each form of phosphorus released from the lake sediments into water body was studied by means of simulation. The results show that under alkalic condition or acidic condition, the temporal and spatial distribution of phosphorus in the water body changes with its releasing mechanism, and its migration and transformation behaviors are various. The change of pH value has no obvious effect on such transformation, but the total phosphorus in the water body has substantial effect on the concentration change of various forms of phosphorus. The results of studying phosphorus from lake sediments have vital significance to migration and transformation of phosphorus between the sediments and the water body system, when environmental conditions change.