Abstract

The goal of this study is to understand the influence of temperature on phosphorus release rate from soil into water. As the temperature increases, PO_4-P reaches equilibrium more quickly and the equilibrium concentration increases, and thus the PO_4-P concentration increases, and pH decreases. The PO_4-P concentration affects pH. PO_4-P released from turbidity is not adsorbed onto the turbidity. PO_4-P was independent on the turbidity and yet PO_4-P was steadily increasing. However, PO_4-P was dependent upon the turbidity concentration as the turbidity releases PO_4-P. The total phosphorous (T-P) and turbidity were directly linked because T-P changed with the turbidity. T-P includes the PO_4-P content of water and the phosphorus content of the turbidity. As the temperature decreases, density of water increases, and the precipitation of turbidity decreases, resulting in an increases in T-P concentration. As the temperature increases, the T-P concentration decreases, but the PO_4-P release rate from turbidity increases. At the same time, even at different temperatures, the T-P concentrations of the samples were about the same. When the lake gets deepened, the water temperature decreases, hence, the phosphorus release rate from soil into water was decreased. This mechanism is of great interest because phosphorus is released from soil sediment into the lake water.