{"created":"2023-05-15T14:55:03.088305+00:00","id":74821,"links":{},"metadata":{"_buckets":{"deposit":"daaa9b61-0e11-4760-a9ab-1bc3037a076d"},"_deposit":{"created_by":1,"id":"74821","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"74821"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00074821","sets":["10:28"]},"author_link":["738802","738803","738800","738805","738801","738799","738804"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2019-03-28","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The leaching of actinides from the fuel debris that has arisen from the severe accident at the Fukushima Daiichi Nuclear Power Station (1F NPS) was inferred from leaching experimentso f simulated fuel debris into seawater [1]. The leaching ratios from the simulated fuel debris were reported in the order corresponding to U > Np ≈ Am ≈ Pu [1]. For the radiological characterisation of contaminated material and waste from the 1F NPS, it is quite important to measure the concentration of actinides, especially uranium with a high leaching ratio. Since uranium has lower α specific radioactivity than the other actinides, it is difficult to detect uranium dissolved in water by α counting. As the total reflection X-ray fluorescence (TXRF) spectrometry is useful for the determination of uranium, we studied a fast and simple analytical method of trace determination of uranium in a multi-element solution which contains 4 ng mL-1 each of 6 elements: Co, Cs, Cu, Th, U and Rb. The method was based on TXRF and dispersive micro-solid phase extraction (DMSPE) using graphene oxide (GO) as a solid adsorbent whose maximum uranium adsorption capacities were higher than any of the reported nanomaterials [2, 3]. In this method, the suspension of GO was injected into a multi-element solution to adsorb uranium. After the adsorption period, uranium adsorbed on the GO nanosheets was separated from the solution by vacuum filtration and soaked to elute in a small volume of internal standard solution of 2 mol L-1 HNO3 mixing with indium internal standard. The 10 μL of the eluents was deposited onto a glass reflector and dried over 5 min, and their TXRF spectra were measured for 5 min. Since rubidium was effectively removed from the uranium-containing solution by the DMSPEGO method, the interference of Rb Kα peak against U Lα peak was avoided in the TXRF spectrometry. The recovery efficiencies of uranium from a dilute multi-element solution by the GO were high, however, they slightly decreased with increasing of the ion strength from 0 to 1 mol L-1. Our findings demonstrate that the TXRF spectrometry followed by preconcentration and Rb removal by DMSPE using GO could be used as a fast and simple analytical method for trace determination of uranium concentration in contaminated water.\n[1] A. Kirishima, M. Hirano, T. Sasaki, N. Sato, J. Nucl. Sci. Technol. 52(10), 2015, 1240-1246.\n[2] Z. J. Li, F. Chen, L. Y. Yuan, Y. L. Liu, Y. L. Zhao, Z. F. Chai, W. Q. Shi, Chem. Eng. J., 210, 2012, 539−546.\n[3] G. X. Zhao, T. Wen, X. Yang, S. B. Yang, J. L. Liao, J. Hu, D. D. Shao, X. K. Wang, Dalton Trans. 41 (20), 2012, 6182−6188.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"European Conference on X-ray Spectrometry (EXRS2018)","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Takahashi, Hiroaki"}],"nameIdentifiers":[{"nameIdentifier":"738799","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Izumoto, Yukie"}],"nameIdentifiers":[{"nameIdentifier":"738800","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsuyama, Tsugufumi"}],"nameIdentifiers":[{"nameIdentifier":"738801","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshii, Hiroshi"}],"nameIdentifiers":[{"nameIdentifier":"738802","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Izumoto, Yukie","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"738803","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsuyama, Tsugufumi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"738804","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshii, Hiroshi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"738805","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Trace determination of uranium preconcentrated using graphene oxide by total reflection X-ray fluorescence spectrometry","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Trace determination of uranium preconcentrated using graphene oxide by total reflection X-ray fluorescence spectrometry"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-03-19"},"publish_date":"2019-03-19","publish_status":"0","recid":"74821","relation_version_is_last":true,"title":["Trace determination of uranium preconcentrated using graphene oxide by total reflection X-ray fluorescence spectrometry"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-16T07:40:18.922050+00:00"}