Highly selective adsorption of radioactive cesium by novel calix[4] biscrown-6 functionalized millimetre-sized hierarchically porous carbon spheres

被引：16

作者：

Dong, Zhimin ^{[1
,2
]}

Li, Zifan ^{[1
]}

Zeng, Dongling ^{[1
]}

Cheng, Zhongping ^{[1
]}

Wang, Yingcai ^{[1
]}

Dai, Ying ^{[1
]}

Cao, Xiaohong ^{[1
]}

Wang, Youqun ^{[1
]}

Zhang, Zhibin ^{[1
]}

Liu, Yunhai ^{[1
]}

机构：

[1] East China Univ Technol, Jiangxi Prov Key Lab Synthet Chem, Nanchang 330013, Jiangxi, Peoples R China

[2] Chinese Acad Geol Sci, Inst Geol, 26 Baiwanzhuang Rd, Beijing 100037, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2023年 / 304卷

基金：

中国国家自然科学基金;

关键词：

Calix[4]biscrown-6; Millimeter-sized carbon spheres; Supramolecular recognition; Cs(I); Adsorption; LEVEL LIQUID WASTE; RING SIZE; REMOVAL; EXTRACTION; SEPARATION; IONS; COMPOSITE; MECHANISM; ADSORBENT; STRONTIUM;

D O I：

10.1016/j.seppur.2022.122255

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The efficient removal of Cs(I) from high-level liquid wastewaters (HLLW) is vital to the environmental remediation and development of nuclear energy. Herein, the novel millimeter-sized carbon-based supramolecular recognition material (C4BisC6/MMCs-P) were designed and constructed by coating polystyrene-divinylbenzene onto millimeter-sized hierarchically porous carbon spheres as matrix immobilization of calix[4]biscrown-6 (C4BisC6). The unique structure endows C4BisC6/MMCs-P with millimeter-sized, convenient recycling, and high selective adsorption capacity for Cs(I). The C4BisC6/MMCs-P-5 (where the weight percent of C4BisC6 was 28.4 %) achieved the greatest distribution coefficient of Cs(I) (225.79 mL.g(-1)), which is almost nine times higher than that of C4BisC6/MMCs. The optimal adsorption acidity was 3.0 mol.L-1HNO3 that was similar acidity of common HLLW. The maximum adsorption capacity of Cs(I) by C4BisC6/MMCs-P-5 was 22.72 mg.g(-1), surpassing to most currently-reported adsorbents. Meanwhile, C4BisC6/MMCs-P-5 showed high selectivity for Cs(I) competing with cations (Rb+, K+, Na+, Sr2+ and Ba2+). This work paves an efficient strategy for separation of Cs (I) from HLLW by ingeniously designing a supramolecular recognition material C4BisC6/MMCs-P-5 to address environmental contamination issue.

引用

页数：10

共 44 条

[1] CALIXCROWNS AND RELATED MOLECULES [J].