The adsorption characters of phosphorus on the 7 floodplain sediments collected in the lower reaches of the Hanjiang River were determined in laboratory

and the effects of temperature and disturbance on phosphorus adsorption isotherms were also researched.The improved Langmuir model and the Freundlish model were used to describe phosphorus adsorption properties on the sediments.The values of the maximum sorption capacity(Q

max

)

native phosphorus polluted（NAP-polluted） content

zero equilibrium phosphorus concentration(EPC

0

) value and partitioning coefficient（K

p

） were attained.The results showed that the improved Langmuir model was fitter for describing phosphorus adsorption on floodplain sediments compared with Freundlish model in the experiment.The correlation between Q

max

and K

p

was described well by linear equation and phosphorus adsorption or desorption capacity was weak at lower temperature.Particle concentration effect was strongest at strong disturbance（200 r/min） and was weakest at medium disturbance（150 r/min）.Particle concentration effect took second place at weak disturbance（100 r/min）.