Spectroscopic and theoretical investigation on efficient removal of U(VI) by amine-containing polymers

被引:24
作者
Ding, Congcong [1 ]
Cheng, Wencai [1 ,2 ]
Nie, Xiaoqin [1 ,2 ]
Niu, Zhenwei [2 ]
Duan, Tao [2 ]
Zhang, Yuanyuan [1 ,2 ]
Asiri, Abdullah M. [3 ]
Marwani, Hadi M. [3 ]
Li, Ying [4 ]
Sun, Yubing [4 ]
机构
[1] Southwest Univ Sci & Technol, Fundamental Sci Nucl Wastes & Environm Safety Lab, Mianyang 621010, Peoples R China
[2] Southwest Univ Sci & Technol, Sch Natl Def Sci & Technol, Mianyang 621010, Peoples R China
[3] King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
[4] North China Elect Power Univ, Sch Environm & Chem Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China
基金
中国国家自然科学基金;
关键词
Amine-containing polymers; U(VI); Sorption; DFT calculation; COVALENT ORGANIC FRAMEWORKS; GRAPHENE OXIDE; COMPOSITES; ADSORPTION; EXAFS; SEQUESTRATION; ENRICHMENT; REDUCTION; SORPTION; RADIONUCLIDES;
D O I
10.1016/j.cej.2019.02.142
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Amine containing polymers (ACPs) were synthesized by heating glyoxal and melamine under argon conditions. The batch characterization, including SEM, FTIR, XRD and XPS techniques, indicated that ACPs had various nitrogen-containing functional groups. The batch experiments indicated that ACPs presented the high removal performances (Qmax = 250 mg/g, calculated by Langmuir model), well stability, strong salt tolerance and great regeneration cycle toward U(VI). XPS analysis confirmed the coordination of U(VI) with nitrogen- or oxygen-containing groups via covalent bonding. The theoretical calculations revealed that the binding energies of U-N, U-O and U-C were -27.49, -16.94 and -11.81 kcal/mol, respectively, indicating that U(VI) was tended to combine with nitrogen- containing groups. These observations suggested that ACPs can be regarded as a promising adsorbent for immobilization and pre-concentration of U(VI)-containing wastewater in environmental cleanup.
引用
收藏
页码:94 / 101
页数:8
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