干湿交替对徒骇河沉积物磷的吸附解吸影响研究

Effect of Drying-Wetting Alternation on Phosphorus Adsorption-Desorption of Sediment in Tuhai River

通过实验室模拟的方法,研究了干湿交替对徒骇河沉积物磷的吸附解吸的影响,结果表明:在一定扰动条件下,风干沉积物比淹水沉积物向上覆水体的释磷作用更强;同时吸附上覆水体中磷的能力减弱,磷的吸附容量减小,导致对上覆水体中磷净化能力的降低。研究结果以期为北方地区河流水体富营养化的防治提供科学的依据。

Using the method of laboratory simulation, the phosphorous adsorption and desorption of sediments in Tuhai River under alternating flooding-drying conditions were studied. The results showed that under simulative disturbing conditions air-dried sediments had a stronger ability to discharge phosphorus to overlying water than fresh sediments. The ability of air-dried sediments to adsorb phosphorus from overlying water became weak, and the adsorption capacity decreased, reducing the ability of sediments to purify phosphorus in overlying water. This study will provide scientific basis for prevention of water eutrophication in northern rivers.