نبذة مختصرة : Effective recovery of uranium from wastewater has positive significance to environmental treatment and the development of the nuclear industry. Through electrospinning technology, the ternary layered double hydroxide (NiFeAl-LDHs), polyvinyl alcohol (PVA) and polyacrylic acid (PAA) was used as the precursor solution to produce NiFeAl-LDHs/PVA/PAA composite nanofibers, and it can adsorb uranium under weak acid conditions. The material structure and character of the prepared fiber were analyzed by SEM, FT-IR, XRD and XPS, besides the various factors on the adsorption of uranium by the fiber under static adsorption were studied. The adsorption process of NiFeAl-LDHs/PVA/PAA to U(VI) conformed to the pseudo-second-order model (R2 > 0.998). The maximum theoretical adsorption capacity of U(VI) on NiFeAl-LDHs/PVA/PAA was 203.32 mg/g at pH 6.0 calculated by the Langmuir model. The value of thermodynamic parameters showed that the adsorption process of uranium on NiFeAl-LDHs/PVA/PAA was endothermic and spontaneous. NiFeAl-LDHs/PVA/PAA can still effectively adsorb uranium after passing five adsorption–desorption cycle tests. Therefore, NiFeAl-LDHs/PVA/PAA was expected to be used in practical applications to treat uranium-containing wastewater.
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