Abstract: In order to solve the problem of recovery from low concentration leachate in the late leaching stage of ion adsorption type rare earth ore, this work reports the preparation of porous silica gel adsorbents functionalized by amine groups (SiO₂-NH₂) and their application in adsorption of La(Ⅲ) ions from the simulated solution.The effects of pH, adsorption time, initial concentrations of La(Ⅲ) on La(Ⅲ) adsorption are systematically investigated.The effect of pH on the La(Ⅲ) adsorption is significant, and the optimal pH for La(Ⅲ) adsorption is 6.4.The adsorption isotherm can be described by Langmuir equation and La(Ⅲ) adsorption amount is calculated as 38.02 mg/g at 298 K.The adsorption kinetics follows the pseudo-second-order kinetics model and the adsorption equilibrium time is about 6 h.La(Ⅲ) adsorption capacity remains constant without obvious variation after 12 adsorption-desorption cycles, which indicates that SiO₂-NH₂ has an excellent recycle property.