Facile immobilization of NiFeAl-LDHs into electrospun poly(vinyl alcohol)/poly(acrylic acid) nanofibers for uranium adsorption

被引：14
作者：
Xie, Jinhua [1 ,2 ]
Dai, Ying [1 ,2 ]
Wang, Youqun [1 ]
Liu, Yuhui [1 ]
Zhang, Zhibin [1 ,2 ]
Wang, Yingcai [1 ,2 ]
Tao, Qinqin [1 ,2 ]
Liu, Yunhai [1 ,2 ]
机构：
[1] East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China
[2] East China Univ Technol, Sch Chem Biol & Mat Sci, Nanchang 330013, Jiangxi, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2021年 / 329卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Adsorption; Uranium; Electrospinning; NiFeAl-LDHs; Polyvinyl alcohol; Polyacrylic acid; LAYERED DOUBLE HYDROXIDES; FARMLAND-RICE SYSTEM; MAGNETIC NANOPARTICLES; EFFICIENT REMOVAL; U(VI); SORPTION; REMEDIATION; POLLUTION; RECOVERY; VI;
D O I：
10.1007/s10967-021-07860-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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 (R-2 > 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.
引用
收藏
页码：1103 / 1117
页数：15
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