Facile synthesis of magnetic chitosan nano-particles functionalized with N/O-containing groups for efficient adsorption of U(VI) from aqueous solution

被引：28
|
作者：
Sheng, Lin [1 ]
Zhou, Limin [1 ,2 ]
Huang, Zhiwei [1 ]
Liu, Zhirong [1 ]
Chen, Quanshui [1 ]
Huang, Guolin [1 ,3 ]
Adesina, Adesoji A. [2 ]
机构：
[1] East China Univ Technol, State Key Lab Nucl Resources & Environm, 418 Guanglan Rd, Nanchang 330013, Peoples R China
[2] Univ New South Wales, Sch Chem Sci & Engn, Sydney, NSW 2035, Australia
[3] China Univ Geosci, Engn Res Ctr Nanogeo Mat, Minist Educ, Wuhan 430074, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2016年 / 310卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Chitosan; Functionalization; N/O-containing groups; Magnetic sorption; Uranium; URANYL-ION; SELECTIVE ADSORPTION; METAL-IONS; URANIUM; REMOVAL; DIETHYLENETRIAMINE; EXTRACTION; SORPTION; THORIUM; RESINS;
D O I：
10.1007/s10967-016-5014-z
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The diethylenetriaminepentaacetic acid-functionalized magnetic chitosan nano-particles (DTPA-MCS) were facilely synthesized. The DTPA-MCS exhibited good affinity and fast kinetic for U(VI) sorption due to its high density of N/O-containing groups. The sorption kinetics followed pseudo-second-order equation, whereas the sorption isotherms agreed well with Langmuir model, with the maximum sorption capacity of 0.66 mmol/g at pH 5.0 and 298 K. Thermodynamic data indicated a spontaneous and endothermic sorption process. The U(VI) sorption mainly proceeds through inner-sphere complexation, as evidenced by the slight influence of ionic strength. The DTPA-MCS could be regenerated by 0.40 M thiourea-0.20 M HNO3 and reused for sorption.
引用
收藏
页码：1361 / 1371
页数：11
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