沉积物粒径对磷营养盐释放的影响试验.

There are various factors that lead to lake eutrophication. Taking Yanming Lake as the research object, this paper discusses the effect of five different sediment particle sizes (0. 08, 0. 15, 0. 30, 0. 425 and 1. 00 mm) on phosphorus nutrients through laboratory tests and the influence of sediment on the release of phosphorus nutrients. The test results show that the changes of the five forms of phosphorus increases with the increase of particle size of sediment. Under different sediment particle size, the time required for the same form of phosphorus to reach a stable release is the same. However, different forms of phosphorus show different release laws, and the time required to achieve a stable release is also different. The curve fitting shows that the optimal fitting functions of total phosphorus (TP), dissolved total phosphorus (DTP), dissolved active phosphorus (SRP) and particulate phosphorus (PP) content and sediment particle size are all logarithmic function. The best fit function of dissolved organic phosphorus (DOP) content and sediment particle size is a linear function. [ABSTRACT FROM AUTHOR]