Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres

doi:10.1016/j.cej.2017.06.169

ISL OpenIR > 青海盐湖研究所知识仓储

	Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres
	Zhu, Yongfeng; Wang, Wenbo; Zhang, Huifang; Ye, Xiushen; Wu, Zhijian; Wang, Aiqin
第一作者	Zhu, Yongfeng
	2017-11-01
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
卷号	327 页码:982-991
关键词	Porous Sphere Adsorbent Pickering Emulsion Enrichment Rubidium Cesium Magnetic
摘要	A novel recyclable magnetic porous sphere adsorbent is prepared by grafting acrylic acid (AA) onto hydroxypropyl cellulose (HPC) through a Pickering emulsion integrated precipitation polymerization and used for the enrichment of scattered strategic metals Rb+ and Cs+. The modified Fe3O4 nanoparticles can not only stabilize the Pickering emulsion template for forming pores, but also make the adsorbent easy to be separated from solution by magnetic field. The adsorption results indicate that the adsorption of Rb+ and Cs+ by the sphere adsorbent rapidly reaches equilibrium within 15 and 30 min, respectively. The saturated adsorption capacities reach 310 and 448 mg/g for Rb+ and Cs+, respectively, which are better than that reported in most of literatures. Fourier transform infrared spectra (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses confirm that the chemical complexation of -COO and -OH with Rb+ and Cs+ contribute mainly to the adsorption. In addition, the adsorbent is very easy to be recovered and regenerated, and the adsorption capacity does not decrease significantly even after five consecutive adsorption-desorption cycles, as compared with the initial adsorption capacity. The results of dynamic adsorption experiments show that the flow rate, initial ion concentration and column height have an effect on the adsorption capacities of Rb+ or Cs+. In a word, this recyclable sphere adsorbent is promising to be used for the efficient adsorption and enrichment of rare metals. (C) 2017 Elsevier B.V. All rights reserved.
DOI	10.1016/j.cej.2017.06.169
语种	英语
引用统计	正在获取...
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6248
专题	青海盐湖研究所知识仓储盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Zhu, Yongfeng,Wang, Wenbo,Zhang, Huifang,et al. Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres[J]. CHEMICAL ENGINEERING JOURNAL,2017,327:982-991.
APA	Zhu, Yongfeng,Wang, Wenbo,Zhang, Huifang,Ye, Xiushen,Wu, Zhijian,&Wang, Aiqin.(2017).Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres.CHEMICAL ENGINEERING JOURNAL,327,982-991.
MLA	Zhu, Yongfeng,et al."Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres".CHEMICAL ENGINEERING JOURNAL 327(2017):982-991.

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