Synthesis, characterization and aging study of kaolinite-supported zero-valent iron nanoparticles and its application for Ni(II) adsorption

被引：39
作者：
Wang, Jiao [1 ,2 ]
Liu, Guijian [1 ,2 ]
Zhou, Chuncai [1 ]
Li, Tanfu [1 ]
Liu, Jingjing [1 ]
机构：
[1] Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Sch Earth & Space Sci, Hefei 230026, Peoples R China
[2] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2014年 / 60卷
基金：
中国国家自然科学基金;
关键词：
Metals; Nanostructures; Chemical synthesis; X-ray diffraction; Transmission electron microscopy (TEM); AQUEOUS-SOLUTION; REMOVAL; KINETICS; IONS; SORPTION; CR(VI); MODELS; PB(II);
D O I：
10.1016/j.materresbull.2014.09.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Kaolinite-supported zero-valent iron nanoparticles (kaolinite-nZVI) were prepared by a liquid-phase reduction under ambient atmosphere. The synthesized kaolinite-nZVI particles exist on the surface of clays or form a chain independently. A good dispersion of the swelling black sheer was observed to affix to the surface of kaolinate, and a complete core-shell structure may protect the iron oxide from more hydration. Synthesized nanoparticles were used to adsorb Ni(II) from aqueous solution. It was found that the adsorption of Ni(II) on kaolinite-nZVI was highly pH-dependent, following pseudo second-order kinetics model. The Langmuir isotherm model fits well with the Ni(II) adsorption on kaolinite-nZVI. Kaolinite-nZVI was more times useful, and showed a better adsorption capacity (9.24 mg/g) than nZVI (8.69 mg/g), kaolinite(1.61 mg/g) and ZVI (4.58 mg/g). These works promote the granulation, storage and transportation of nZVI, greatly enhancing the promising in environmental applications. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：421 / 432
页数：12
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