底泥曝气对磷吸附容量和底泥中不同形态磷含量的影响(英文)

The effect of aerating to sediment on phosphorus adsorption capacity and phosphorus forms in the sediment

研究了底泥曝气对底泥吸附磷的强化作用以及对底泥中不同形态磷数量分布的影响,底泥采自校园河流。结果表明:底泥曝气有利于上覆水中磷向底泥迁移,并且,这种促进作用优于对水曝气。底泥曝气后,底泥对磷的吸附容量显著增加。底泥曝气显著增加了磷的累计吸附量,并高于对水曝气。原因可能与有机物去除有关。底泥曝气可以强化潜在活性磷向难释放态磷转化,这种强化作用高于对水曝气。

The enhancement on phosphorus adsorption onto sediments and the effect on the phosphorus forms in the sediments by aerating to sediment were investigated, using sediments from the campus canal as material. The results show that aerating to sediment facilitates to the migration of phosphorus from overlying water to sediments and the enhancement was more evident than that by aerating to water. The phosphorus adsorption capacity of sediments after aerated was enhanced. Aerating to sediment obviously enhanced the accumulative adsorption quantity of phosphorus, higher than that by aerating to water. The main reason of it could be associated with the organic matter removal. Aerating to sediment would enhance the transformation from potentially mobile phosphorus to refractory forms in the sediments. The enhancement to this transformation by aerating to sediment was more evident than that by aerating to water.