Sorption of Strontium to Uraninite and Uranium(IV)-Silicate Nanoparticles.

التفاصيل البيبلوغرافية
العنوان:	Sorption of Strontium to Uraninite and Uranium(IV)-Silicate Nanoparticles.
المؤلفون:	Neill TS; Research Centre for Radwaste Disposal and Williamson Research Centre, School of Earth & Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Morris K; Research Centre for Radwaste Disposal and Williamson Research Centre, School of Earth & Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Pearce CI; Pacific Northwest National Laboratory, Richland, Washington 99354, United States., Sherriff NK; National Nuclear Laboratory, Chadwick House, Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K., Bryan N; National Nuclear Laboratory, Chadwick House, Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K., Rigby B; Sellafield Ltd., Hinton House, Birchwood Park Avenue, Risley, Warrington, Cheshire WA3 6GR, U.K., Shaw S; Research Centre for Radwaste Disposal and Williamson Research Centre, School of Earth & Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
المصدر:	Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2022 Mar 15; Vol. 38 (10), pp. 3090-3097. Date of Electronic Publication: 2022 Feb 28.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 9882736 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5827 (Electronic) Linking ISSN: 07437463 NLM ISO Abbreviation: Langmuir Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Original Publication: Washington, DC : American Chemical Society, c1985-
مستخلص:	Spent nuclear fuel contains both uranium (U) and high yield fission products, including strontium-90 ( ⁹⁰ Sr), a key radioactive contaminant at nuclear facilities. Both U and ⁹⁰ Sr will be present where spent nuclear fuel has been processed, including in storage ponds and tanks. However, the interactions between Sr and U phases under ambient conditions are not well understood. Over a pH range of 4-14, we investigate Sr sorption behavior in contact with two nuclear fuel cycle relevant U(IV) phases: nano-uraninite (UO 2 ) and U(IV)-silicate nanoparticles. Nano-UO 2 is a product of the anaerobic corrosion of metallic uranium fuel, and UO 2 is also the predominant form of U in ceramic fuels. U(IV)-silicates form stable colloids under the neutral to alkaline pH conditions highly relevant to nuclear fuel storage ponds and geodisposal scenarios. In sorption experiments, Sr had the highest affinity for UO 2 , although significant Sr sorption also occurred to U(IV)-silicate phases at pH ≥ 6. Extended X-ray absorption fine structure (EXAFS) spectroscopy, transmission electron microscopy, and desorption data for the UO 2 system suggested that Sr interacted with UO 2 via a near surface, highly coordinated complex at pH ≥ 10. EXAFS measurements for the U(IV)-silicate samples showed outer-sphere Sr sorption dominated at acidic and near-neutral pH with intrinsic Sr-silicates forming at pH ≥ 12. These complex interactions of Sr with important U(IV) phases highlight a largely unrecognized control on ⁹⁰ Sr mobility in environments of relevance to spent nuclear fuel management and storage.
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تواريخ الأحداث:	Date Created: 20220228 Latest Revision: 20220716
رمز التحديث:	20221213
مُعرف محوري في PubMed:	PMC9098169
DOI:	10.1021/acs.langmuir.1c02927
PMID:	35226492
قاعدة البيانات:	MEDLINE

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