The huge specific surface area and surface active group are two typical properties of humic acid.These characters made the humic acid have direct effect on the soil pollution,nutrient fixation,nutrient utilization and nutrient transformation.We used the shock equilibrium method to research how the humic acid affects phosphorus adsorption by change the concentration of humic acid in five typical soils in China.Freundlich,Langumuir and Temkin models were used to quantify the influence degree of humic acid on ...