A Reliable Hybrid Adsorbent for Efficient Radioactive Cesium Accumulation from Contaminated Wastewater

Scientific Reports
Md Rabiul AwualTomitsugu Taguchi

Abstract

Cesium (Cs) removal from nuclear liquid wastewater has become an emerging issue for safeguarding public health after the accident at the Fukushima Daiichi Nuclear Power Plant. A novel macrocyclic ligand of o-benzo-p-xylyl-22-crown-6-ether (OBPX22C6) was developed and successfully immobilized onto mesoporous silica for the preparation of hybrid adsorbent. The benzene ring π electron is the part of crown ether of OBPX22C6 for easy orientation of the macrocyclic compound for making the π electron donation with Cs complexation. The potential and feasibility of the hybrid adsorbent as being Cs selective was evaluated in terms of sensitivity, selectivity and reusability. The results clarified that the Cs removal process was rapid and reached saturation within a short time. Considering the effect of competitive ions, sodium (Na) did not markedly affect the Cs adsorption whereas potassium (K) was slightly affected due to the similar ionic radii. However, the oxygen in long ethylene glycol chain in OBPX22C6 was expected to show strong coordination, including Cs-π interaction with Cs even in the presence of the high amount of K and Na. Due to its high selectivity and reusability, significant volume reduction is expected as this promising...Continue Reading

References

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Citations

Jan 21, 2017·Journal of Environmental Management·Zohreh Majidnia, Mohamad Ali Fulazzaky
Apr 8, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yamin ChaiWenzhong Li
Oct 25, 2020·Environmental Science and Pollution Research International·Md Matiar RahmanBidyut Baran Saha
Jul 20, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·J W SooA A Adeyi
Nov 21, 2017·Organic Letters·Jianing XieArjan W Kleij
Aug 22, 2021·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Erhan KarabayirB Filiz Senkal
Aug 27, 2021·Journal of Chromatography. a·Ismail M M RahmanHiroshi Hasegawa

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Methods Mentioned

BETA
irradiating
scanning electron microscopy
transmission electron microscopy
column chromatography
NMR

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