Studies on chemical state of uranium in modified sodium borosilicate glass using X-ray photoelectron spectroscopy and X-ray absorption spectroscopy

被引：6

作者：

Praveena, N. ^{[1
,3
]}

Jena, Hrudananda ^{[1
,2
]}

Bera, Santanu ^{[1
,3
]}

Kumar, Ravi ^{[4
]}

Jha, S. N. ^{[4
]}

Bhattacharyya, D. ^{[4
]}

机构：

[1] BARC, Homi Bhaha Natl Inst, Mumbai, Maharashtra, India

[2] Indira Gandhi Ctr Atom Res, Mat Chem Div, Mat Chem & Met Fuel Cycle Grp, Kalpakkam 603102, Tamil Nadu, India

[3] Bhabha Atom Res Ctr Facil BARCF, WSCD, Kalpakkam 603102, Tamil Nadu, India

[4] BARC, Atom & Mol Phys Div, Mumbai, Maharashtra, India

来源：

PROGRESS IN NUCLEAR ENERGY | 2021年 / 131卷

关键词：

Borosilicate glass; Uranium oxidation state; XPS studies of uranium in glass; XAS; X-ray diffraction; WASTE; XPS; IMMOBILIZATION; CHEMISTRY; ALKALI;

D O I：

10.1016/j.pnucene.2020.103579

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The modified sodium borosilicate glass was synthesized by incorporating CaO, TiO2 and Al2O3 to the primary glass forming constituents (SiO2, B2O3 and Na2O) and on melting the mixture at 1373-1473K/3h by melt quench method. Uranium loaded analogues were synthesized by adding varying amounts of UO3 (2,4,6 and 8 mol %) to the borosilicate glass forming reagents then on melting at 1373-1473K. The U-loaded matrices were characterized by XRD to ensure the formation of glass matrices. Solubility of uranium in sodium borosilicate glass has been investigated. Further, the glasses were characterized by X-ray photoelectron spectroscopy (XPS) to unravel the oxidation states of uranium in the modified glass composition. X-ray absorption spectroscopy (EXAFS) revealed the chemical environment of uranium in the glass matrix indicating the coordination number of U in glass.

引用

页数：8

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