湖泊沉积物内部因素对沉积物-水界面磷交换的影响

湖泊沉积物既可充当湖泊水体营养盐的汇也可转变为源,而磷则是富营养化的制约性因子。沉积物-水界面的磷交换过程与沉积物本身的物理化学特征直接相关。本文对沉积物-水界面磷交换动态的内部影响因子及其作用进行了综合分析,并分别论述了沉积物粒级分布、磷的存在形态、电子受体、有机物等对沉积物-水界面磷交换过程的影响与作用。

Effect of Internal Factors of Sediments on Phosphorus Exchanging across the Sediment-water Interface in Lakes

Lake sediments act as not only sink but also source of nutritional materials.Phosphorus is usually recognized as the most critical factor limiting eutrophication.Phosphorus exchange processes between the sediment and water are directly associated with the physical and chemical characteristics of the sediment itself.The internal factors that affect phosphorus exchange across the sediment-water interface were summarized and analyzed basing on literatures in this paper.The effects of sediment composition including distribution of fractions,phosphorus forms,electron acceptors,organic material etc.on phosphorus exchange across the sediment-water interface were discussed respectively.