In situ formed magnetic chitosan nanoparticles functionalized with polyethylenimine for effective U(VI) sorption

被引：13

作者：

Sun, Guoquan ^{[1
]}

Zhou, Limin ^{[1
]}

Tang, Xiaohuan ^{[1
]}

Le, Zhanggao ^{[1
]}

Liu, Zhirong ^{[1
]}

Huang, Guolin ^{[1
]}

机构：

[1] East China Univ Technol, State Key Lab Nucl Resources & Environm, 418 Guanglan Rd, Nanchang 330013, Jiangxi, Peoples R China

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2020年 / 325卷 / 02期

关键词：

Magnetic nanoparticles; Chitosan; Uranium; Sorption; AQUEOUS-SOLUTIONS; MESOPOROUS SILICA; ADSORPTION; URANIUM; REMOVAL; EXTRACTION; CHEMISTRY; RECOVERY; WATER; VI;

D O I：

10.1007/s10967-020-07230-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The polyethylenimine-functionalized magnetic chitosan nanoparticles (MCN-PEI) are synthesized and characterized by elemental analysis, TEM, FT-IR, XRD, etc. The MCN-PEI exhibits a core-shell structure, and had a saturation magnetization of 18.7 emu/g (which is high enough for fast magnetic separation). The maximum U(VI) sorption capacity for MCN-PEI reaches 134.6 mg/g at pH 5.0 and 298 K. The good-fitting of both sorption kinetics by pseudo-second-order model and sorption isotherms by Langmuir model indicates chemisorption mechanism. The thermodynamic parameters indicate the spontaneous and exothermic nature for U(VI) sorption. Finally, the magnetic nano-sorbents can be efficiently desorbed by acidified EDTA solution for regeneration.

引用

页码：595 / 604

页数：10

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