Adsorption kinetics of phosphorus in different lake sediments

The adsorption kinetics of phosphorus in different composition of lake sediments were studied. The conclusions are as follows. The more organic mater in sediment is, the higher phosphorus sorption maxima will be. Factors affecting phosphorus sorption include OM, total-Fe, total-Mg and clay content. Sorption rate of phosphate on sediment are improved with the increase of clay content and total-Fe. OM of sediment also affects sorption rate of phosphate. Elovich equation is the best one among the fitted model equations and parabolic diffusion equation is the worst. The other two models (first-order equation and two-constant rate equation) are between the above two.