Recovery of cesium ions from seawater using a porous silica-based ionic liquid impregnated adsorbent

A porous silica-based adsorbent was prepared by impregnating the pores of a silica support with the extractant 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) and an additive agent 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C2mim + NTf2−) as the m...

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Published in:Nuclear engineering and technology 2022, 54(5), , pp.1597-1605
Main Authors: Wu, Hao, Kudo, Tatsuya, Kim, Seong-Yun, Miwa, Misako, Matsuyama, Shigeo
Format: Article
Language:English
Subjects:
Adsorption
Cesium
Particle-induced X-ray emission
Seawater
원자력공학
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cited_by cdi_FETCH-LOGICAL-c506t-95691635244f3fc343cd0d257dc73d2f0de4d81d423466b5c953f077018aa10f3
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container_issue 5
container_start_page 1597
container_title Nuclear engineering and technology
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creator Wu, Hao
Kudo, Tatsuya
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Matsuyama, Shigeo
description A porous silica-based adsorbent was prepared by impregnating the pores of a silica support with the extractant 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) and an additive agent 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C2mim + NTf2−) as the materials to remove cesium(I) (Cs+) ions from seawater. The as-prepared adsorbent showed excellent adsorption performance toward Cs+ ions, with adsorption equilibrium reached within 2 h and an adsorption amount of 0.196 mmol/g observed. The solution pH, temperature, and the presence of coexisting metal ions were found to have almost no effect on Cs+ adsorption. The adsorption mechanism was considered to proceed via ion exchange between Cs+ and C2mim+. In addition, the particle-induced X-ray emission analysis results further clarified that the adsorbed Cs+ ion species on the adsorbent was in the form of both CsCl and CsBr.
doi_str_mv 10.1016/j.net.2021.10.026
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subjects Adsorption
Cesium
Particle-induced X-ray emission
Seawater
원자력공학
title Recovery of cesium ions from seawater using a porous silica-based ionic liquid impregnated adsorbent
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