Study on the adsorption of phosphorus in the sediments taken from LiaoHe river

The adsorption of phosphorus on five samples of sediments taken from LiaoHe river at high and low concentration were studied. The results indicated that The phosphate adsorption isotherms on sediment from LiaoHe river accord with the Langmnir isotherm as well as the Freundlish isotherm in the high initial phosphorus concentration The Qmax, K and K·Qmax is higher than the else samples, it indicated that the sediment of the Mahushan has the stronger phosphate adsorption ability. The phosphate adsorption isotherms on sediment from LiaoHe were fitted by linear model in low initial phosphorus concentration. The phosphorus adsorption-desorption equilibrium concentration is from 0.1143mg/l~0.1233mg/l. It was higher than the phosphorus concentration in the overlying water, the possibility of phosphorus release is high.