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Fast and high-capacity adsorption of Rb+ and Cs+ onto recyclable magnetic porous spheres
Zhu, Yongfeng1; Wang, Wenbo1; Zhang, Huifang2; Ye, Xiushen2; Wub, Zhijian2; Wang, Aiqin1
2017-11-01
发表期刊CHEMICAL ENGINEERING JOURNAL
卷号327页码:982-991
文章类型Article
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.
关键词Porous Sphere Adsorbent Pickering Emulsion Enrichment Rubidium Cesium Magnetic
WOS标题词Science & Technology ; Technology
关键词[WOS]PICKERING EMULSION ; AMMONIUM MOLYBDOPHOSPHATE ; CELLULOSE NANOCRYSTALS ; AQUEOUS-SOLUTIONS ; ION-EXCHANGE ; RUBIDIUM ; EXTRACTION ; HEXACYANOFERRATE ; MICROSPHERES ; FABRICATION
收录类别SCI
语种英语
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000408663800101
引用统计
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
作者单位1.Chinese Acad Sci, Key Lab Clay Mineral Appl Res Gansu Prov, Ctr Ecomat & Green Chem, Lanzhou Inst Chem Phys, Tianshui Middle Rd 18, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Key Lab Salt Lake Resources & Chem, Qinghai Inst Salt Lakes, Xining Rd 18, Xining 810008, Qinghai, Peoples R China
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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,Wub, 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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