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Chinese Academy of Sciences Institutional Repositories Grid
Influence of gamma irradiation on uranium determination by Arsenazo III in the presence of Fe(II)/Fe(III)

文献类型:期刊论文

作者Zheng, Zhong1; Kang, Mingliang1; Wang, Chunli1; Liu, Chunli1; Grambow, Bernd2; Duro, Lara3; Suzuki-Muresan, Tomo2
刊名CHEMOSPHERE
出版日期2014-07-01
卷号107页码:373-378
关键词Decomposition Arsenazo Iii Gamma Irradiation Fenton Reaction u(Vi) Fe(Ii)/Fe(Iii)
ISSN号0045-6535
DOI10.1016/j.chemosphere.2013.12.094
英文摘要Arsenazo III is a widely used reagent for the concentration measurement of uranium and other actinides in aqueous samples. This study indicates that, for routine aqueous samples, due to the strong complexing ability with Arsenazo III, Fe(III) can significantly decrease the UV-Vis absorbance of the U(VI)-Arsenazo III complex, whereas the influence of Fe(II) on the absorbance is negligible. However, when Fe(II) is present in a gamma-irradiated U(VI) aqueous sample, it can give rise to the Fenton reaction, which produces oxidizing radicals that decompose the subsequently added Arsenazo III, leading to a sharp decrease in the absorbance of the U(VI)-Arsenazo III complex. The decrease in absorbance depends on the iron content and irradiation dose. Furthermore, the oxidizing radicals from the Fenton reaction induced by gamma irradiation can be continually produced. Even if the irradiated solution has been aged for more than one month in the absence of light at room temperature and without the exclusion of oxygen, the reactivity of the radicals did not decrease toward the subsequently added Arsenazo Ill. This finding demonstrates that the presence of Fe(II) in gamma-irradiated U(VI) aqueous samples can lead to incorrect U(VI) measurement using the Arsenazo III method, and a new method needs to be developed for the quantitative determination of U(VI) in the presence of gamma radiation and ferrous iron. (C) 2014 Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000337929600048
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://ir.iccas.ac.cn/handle/121111/51777]  
专题中国科学院化学研究所
通讯作者Liu, Chunli
作者单位1.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Fundamental Sci Lab Radiochem & Radiat Chem, Beijing 100871, Peoples R China
2.Univ Nantes, Ecole Mines Nantes, CNRS IN2P3, SUBATECH,Unite Mixte Rech 6457, F-44307 Nantes 03, France
3.AMPHOS21, E-08019 Barcelona, Spain
推荐引用方式
GB/T 7714
Zheng, Zhong,Kang, Mingliang,Wang, Chunli,et al. Influence of gamma irradiation on uranium determination by Arsenazo III in the presence of Fe(II)/Fe(III)[J]. CHEMOSPHERE,2014,107:373-378.
APA Zheng, Zhong.,Kang, Mingliang.,Wang, Chunli.,Liu, Chunli.,Grambow, Bernd.,...&Suzuki-Muresan, Tomo.(2014).Influence of gamma irradiation on uranium determination by Arsenazo III in the presence of Fe(II)/Fe(III).CHEMOSPHERE,107,373-378.
MLA Zheng, Zhong,et al."Influence of gamma irradiation on uranium determination by Arsenazo III in the presence of Fe(II)/Fe(III)".CHEMOSPHERE 107(2014):373-378.

入库方式: OAI收割

来源:化学研究所

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