title: A Reliable Hybrid Adsorbent for Efficient Radioactive Cesium Accumulation from Contaminated Wastewater.
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 hybrid adsorbent is used for Cs removal in Fukushima wastewater.
authors.affiliation: Actinide Chemistry Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan.
authors.forename: Md Rabiul
authors.initials: MR
authors.lastname: Awual
authors.affiliation: Actinide Chemistry Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yaita
authors.affiliation: Actinide Chemistry Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Miyazaki
authors.affiliation: Environment and Materials Dynamics Research Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan.
authors.forename: Daiju
authors.initials: D
authors.lastname: Matsumura
authors.affiliation: Actinide Chemistry Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Shiwaku
authors.affiliation: Laser Processing Research Group, Quantum Beam Science Center, Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki-ken 319-1195, Japan.
authors.forename: Tomitsugu
authors.initials: T
authors.lastname: Taguchi
mesh_terms: D000327:Adsorption; D002588:Cesium Radioisotopes / Q000737:chemistry; D062406:Fukushima Nuclear Accident; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry; D062065:Wastewater / Q000032:analysis / Q000737:chemistry; D014875:Water Pollutants, Radioactive; D014876:Water Pollution
chemical_list: D002588:Cesium Radioisotopes; D009584:Nitrogen; D012822:Silicon Dioxide; D062065:Wastewater; D014875:Water Pollutants, Radioactive
references.citation: J Environ Radioact. 2002;58(2-3):163-73
references.pmid: 11814164
references.citation: Dalton Trans. 2013 Dec 7;42(45):16049-55
references.pmid: 23945598
references.citation: J Am Chem Soc. 2003 Jan 22;125(3):821-9
references.pmid: 12526683
references.citation: Environ Sci Technol. 2001 Oct 1;35(19):3962-6
references.pmid: 11642461
references.citation: Carbohydr Polym. 2014 Oct 13;111:477-84
references.pmid: 25037378
references.citation: J Hazard Mater. 2012 Jul 30;225-226:107-13
references.pmid: 22626629
references.citation: J Hazard Mater. 2015 Jun 30;291:111-9
references.pmid: 25771216
references.citation: J Hazard Mater. 2011 Oct 30;194:331-7
references.pmid: 21871719
references.citation: J Hazard Mater. 2014 Aug 15;278:227-35
references.pmid: 24981675
references.citation: J Hazard Mater. 2008 Dec 30;160(2-3):638-42
references.pmid: 18448244
references.citation: Water Res. 2007 May;41(9):1897-906
references.pmid: 17374545
references.citation: J Am Chem Soc. 2008 Mar 26;130(12):4129-39
references.pmid: 18311976
references.citation: Environ Pollut. 2014 Apr;187:31-41
references.pmid: 24418976
references.citation: Water Res. 2010 Feb;44(3):854-60
references.pmid: 19819515
references.citation: J Hazard Mater. 2009 Jan 30;161(2-3):854-61
references.pmid: 18515005
references.citation: J Hazard Mater. 2010 Nov 15;183(1-3):712-7
references.pmid: 20727676
references.citation: J Hazard Mater. 2012 Dec;243:124-9
references.pmid: 23116720
references.citation: Angew Chem Int Ed Engl. 2012 Jan 23;51(4):984-8
references.pmid: 22180131
references.citation: J Colloid Interface Sci. 2011 Jul 1;359(1):9-18
references.pmid: 21514595
references.citation: Chem Asian J. 2014 Mar;9(3):759-63
references.pmid: 24449636
references.citation: Anal Chim Acta. 2006 Jul 7;571(2):308-14
references.pmid: 17723452
references.citation: J Hazard Mater. 2011 Jun 15;190(1-3):36-44
references.pmid: 21514721