X射线光电子能谱
三聚氰胺
化学
傅里叶变换红外光谱
胺气处理
吸附
氮气
聚合物
核化学
朗缪尔吸附模型
共价键
高分子化学
化学工程
有机化学
工程类
作者
Congcong Ding,Wencai Cheng,Xiaoqin Nie,Zhen-Wei Niu,Tao Duan,Yuanyuan Zhang,Abdullah M. Asiri,Hadi M. Marwani,Ying Li,Yubing Sun
标识
DOI:10.1016/j.cej.2019.02.142
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.
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