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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
Source PublicationCHEMICAL ENGINEERING JOURNAL
Volume327Pages:982-991
SubtypeArticle
AbstractA 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.
KeywordPorous Sphere Adsorbent Pickering Emulsion Enrichment Rubidium Cesium Magnetic
WOS HeadingsScience & Technology ; Technology
WOS KeywordPICKERING EMULSION ; AMMONIUM MOLYBDOPHOSPHATE ; CELLULOSE NANOCRYSTALS ; AQUEOUS-SOLUTIONS ; ION-EXCHANGE ; RUBIDIUM ; EXTRACTION ; HEXACYANOFERRATE ; MICROSPHERES ; FABRICATION
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000408663800101
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Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6248
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.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
Recommended Citation
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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