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 ti...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.UHMWPEFAO exhibits excellent adsorptive performance for U(VI)with a maximum adsorption capacity of 176.12 mg/g at pH4 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.展开更多
基金supported by the National Natural Science Foundation of China(Grants No.U1532259)
文摘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.UHMWPEFAO exhibits excellent adsorptive performance for U(VI)with a maximum adsorption capacity of 176.12 mg/g at pH4 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.
