Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

doi:10.1016/j.jhazmat.2019.03.022

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	Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent
	Liu, Zhong; Zhou, Yongquan; Guo, Min; Lv, Baoliang; Wu, Zhijian; Zhou, Wuzong
	2019-06-05
发表期刊	JOURNAL OF HAZARDOUS MATERIALS
ISSN	0304-3894
卷号	371 页码:712-720
摘要	Carboxyl Fe3O4 nanoparticles (Fe3O4@R-COOH) modified with 18-Crown-6 ether functional groups have been prepared via an amidation reaction and used as bifunctional adsorbent for Cs+. The adsorbent has a super paramagnetic property, allowing an easy recycling, and a high capacity of Cs+ adsorption on the crown ether. The adsorption isotherms and kinetic behaviors agree well with the Langmuir and the pseudo-second-order models. The material exhibits a high selectivity for Cs+ in the solution with co-existing cations (NH4+, Rb+, K+ Na+ and Li+). A theoretical calculation according to density functional theory (DFT) is used to estimate the structure of Cs+ adsorption on crown ether, demonstrating an exothermic process and showing a good agreement with the experimental observations. The adsorption behavior is affected not only by the size of macrocyclic crown ethers, but also by the chelating symmetry and the binding energy. The newly developed adsorbent has a potential application for removing cesium out of wastewater and salt lakes.
DOI	10.1016/j.jhazmat.2019.03.022
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34100
专题	盐湖资源与化学实验室中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Liu, Zhong,Zhou, Yongquan,Guo, Min,et al. Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent[J]. JOURNAL OF HAZARDOUS MATERIALS,2019,371:712-720.
APA	Liu, Zhong,Zhou, Yongquan,Guo, Min,Lv, Baoliang,Wu, Zhijian,&Zhou, Wuzong.(2019).Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent.JOURNAL OF HAZARDOUS MATERIALS,371,712-720.
MLA	Liu, Zhong,et al."Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent".JOURNAL OF HAZARDOUS MATERIALS 371(2019):712-720.

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