Journal
CHEMICAL ENGINEERING JOURNAL
Volume 220, Issue -, Pages 204-213Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2013.01.027
Keywords
Cesium; Heteropoly acid; Mesoporous silica; Sorption
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A2A2A01011447]
- National Research Foundation of Korea [2012R1A2A2A01011447] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The ammonium salt of heteropoly acid (NH(4)HPA) deposited on the surface of mesoporous silica (SBA-15) support was prepared and characterized using the following analytical techniques: X-ray diffraction (XRD), nitrogen adsorption-desorption, scanning electron microscopy (SEM), particle size analysis and infrared spectra. The spectroscopic results revealed that the NH(4)HPA was well dispersed on the internal and external silica surfaces. The ion exchange capacity tests demonstrated that the insertion of the NH(4)HPA phase on the silica surface increased the specific activity for Cs removal. The ion exchange capacity of Cs increased with increasing the HPA loading. The NH(4)HPA at a loading of 50 wt% supported on silica showed a high ion exchange capacity (70.9 mg/g) for Cs ion. The effects of co-existing cations, nitric acid and temperature on the Cs sorption efficiency onto the composites were investigated. (C) 2013 Elsevier B.V. All rights reserved.
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