Impacts of Cr(III) and Cr(VI) concentrations on key high-level waste glass properties

IF 2.5 3区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Glass Science Pub Date : 2025-05-15 DOI:10.1111/ijag.16708

Vivianaluxa Gervasio, Sarah A. Saslow, Jesse B. Lang, Bjorn E. Westman, Derek A. Cutforth, Suzanne M. Baird, Sulaiman E. Sannoh, Renee L. Russell, Jarrod V. Crum, AA Kruger, John D. Vienna

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Abstract

This study investigates the effects of chromium concentration and redox on simulated high-level waste (HLW) borosilicate glass properties for high-chromium Hanford wastes. Thirty glasses with target 1 ≤ Cr₂O₃ ≤ 2.5 wt% were fabricated and analyzed. The Cr redox ratios were measured using K-edge X-ray absorption near edge structure along with properties of interest to vitrification of Hanford HLW: crystal formation after centerline canister cooling, crystallinity as a function of temperature, viscosity, electrical conductivity, toxic characteristic leaching procedure and product consistency test (PCT) responses, and SO₃ solubility. Only Cr(III) and Cr(VI) were identified in the test glasses, and their ratio was found to be largely correlated to optical basicity. Cr redox appeared to have a significant impact on most of the properties, except for PCT. Most properties were affected differently by Cr(III) than by Cr(VI). These effects were quantified and rationalized based on the previously studied bonding nature of the two primary oxidation states.

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Cr（III）和Cr（VI）浓度对高废玻璃关键性能的影响

研究了铬浓度和氧化还原对高铬汉福德废渣模拟高废渣硼硅酸盐玻璃性能的影响。制备了30个靶1≤Cr2O3≤2.5 wt%的玻璃并进行了分析。利用k边x射线吸收近边结构测量了Cr的氧化还原比，以及对汉福德高铁玻璃化感兴趣的特性：中心线罐冷却后的晶体形成，结晶度作为温度、粘度、电导率、毒性特征浸出过程和产品一致性测试（PCT）响应的函数，以及SO3的溶解度。在测试玻璃中只鉴定出Cr（III）和Cr(VI)，并且发现它们的比例与光学碱度有很大关系。Cr（III）和Cr（VI）对大多数性质的影响不同，Cr（III）和Cr（VI）对大多数性质的影响不同。这些影响是量化和合理化的基础上，先前研究的键合性质的两个主要氧化态。

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来源期刊

International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-

CiteScore

4.50

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.