Synthesis and characterization of a novel core-shell magnetic nanocomposite via surface-initiated RAFT polymerization for highly efficient and selective adsorption of uranium(VI)

被引：17
作者：
Dai, Zhongran [1 ]
Zhang, Hui [1 ]
Sui, Yang [2 ]
Ding, Dexin [1 ]
Hu, Nan [1 ]
Li, Le [1 ]
Wang, Yongdong [1 ]
机构：
[1] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China
[2] Hunan Taohuajiang Nucl Power Co Ltd, Yiyang 413000, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2018年 / 316卷 / 01期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Uranium(VI); Magnetic nanocomposite; Surface-initiated RAFT polymerization; Adsorption; SOLID-PHASE EXTRACTION; TRANSFER RADICAL POLYMERIZATION; LAYERED-DOUBLE-HYDROXIDES; MESOPOROUS CARBON; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; URANYL-ION; SEAWATER EXTRACTION; ORGANIC FRAMEWORK; ADSORBENT FIBERS;
D O I：
10.1007/s10967-018-5720-9
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, the nanoparticles possessing a macro-initiator (MNPs@SCSOEt) were firstly obtained by surface-initiated RAFT polymerization. The structure of the nanocomposite was characterized by FT-IR, SEM, TEM, TGA, XPS and VSM. The effects of pH, contact time, initial uranium concentrations, coexisting ions and temperature on the U(VI) adsorption by MNPs@PAO were investigated in detail. The adsorption process was found to be in good agreement with pseudo-second order kinetic model and Langmuir adsorption isotherm model. The maximum adsorption capacity was estimated to be 216.45 mg/g by fitting Langmuir model with the equilibrium data. The adsorption process was endothermic and spontaneous. In addition, the adsorption capacity of MNPs@PAO for U(VI) decreased slightly after five successive adsorption/desorption cycles.
引用
收藏
页码：369 / 382
页数：14
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