TY - JOUR
T1 - Recovery of cesium ions from seawater using a porous silica-based ionic liquid impregnated adsorbent
AU - Wu, Hao
AU - Kudo, Tatsuya
AU - Kim, Seong Yun
AU - Miwa, Misako
AU - Matsuyama, Shigeo
N1 - Publisher Copyright:
© 2021
PY - 2022/5
Y1 - 2022/5
N2 - 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.
AB - 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.
KW - Adsorption
KW - Cesium
KW - Particle-induced X-ray emission
KW - Seawater
UR - http://www.scopus.com/inward/record.url?scp=85118338691&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85118338691&partnerID=8YFLogxK
U2 - 10.1016/j.net.2021.10.026
DO - 10.1016/j.net.2021.10.026
M3 - Article
AN - SCOPUS:85118338691
SN - 1738-5733
VL - 54
SP - 1597
EP - 1605
JO - Nuclear Engineering and Technology
JF - Nuclear Engineering and Technology
IS - 5
ER -