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Amidoxime-functionalized ultra-high molecular weight polyethylene fibers (UHMWPEF-AO) were used to absorb uranium U(Ⅵ) from aqueous solutions.In this paper,we study effects of pH,initial U(Ⅵ) concentration,contact time,and temperature on U(Ⅵ) adsorption by UHMWPEF-AO.The adsorption process agrees well with pseudo-second-order and Langmuir model.UHMWPEF-AO exhibits excellent adsorptive performance for U(Ⅵ)with a maximum adsorption capacity of 176.12 mg/g at pH 4 and 298 K.The structures of UHMWPEF-AO and U(Ⅵ)-loaded UHMWPEF-AO are characterized by FT-IR and nano-CT.U(Ⅵ)-loaded UHMWPEF-AO is sintered after adsorption process to recycle absorbed U(Ⅵ).Powders collected after sintering process are examined by scanning electron microscopy and X-ray diffraction.These results indicate that UHMWPEF-AO is a promising candidate to remove U(Ⅵ) from uranium aqueous solutions.