The effectiveness of TRIS and ammonium buffers in glass dissolution studies: a comparative analysis

Abstract

Selecting appropriate buffers is crucial for evaluating the chemical durability of glass under controlled conditions such as in the EPA 1313 test designed to measure elemental release as a function of pH. The efficacy of two alkali-metal free buffers, TRIS (NH2C(CH2OH)3) and ammonium chloride—ammonia (NH3/NH4Cl), was investigated during EPA 1313 testing of a simulated Hanford low-activity waste borosilicate glass in the alkaline regime (pH 8.5–10.5) at varying temperatures (RT, 40 °C, and 60 °C). While both buffers maintained the desired pH at room temperature, and up to 40 °C, the effectiveness of TRIS decreased at elevated temperatures, particularly at pH 10.5. Although 11B NMR showed evidence of TRIS-B complexation, its effect on the rate of elemental release was found to be negligible under the test conditions. With ammonium buffer, the release of alkali cations was slightly elevated when compared to the same conditions with TRIS at early time points.

Metadata

Item Type:	Article
Authors/Creators:	Ravikumar, R. Thorpe, C.L. https://orcid.org/0000-0002-2860-8611 Corkhill, C.L. https://orcid.org/0000-0002-7488-3219 Walling, S.A. Neeway, J.J. https://orcid.org/0000-0001-7046-8408 Pearce, C.I. https://orcid.org/0000-0003-3098-1615 Kruger, A.A. https://orcid.org/0000-0001-8468-0813 Kosson, D.S. https://orcid.org/0000-0001-9898-456X Marcial, J. Hand, R.J. https://orcid.org/0000-0002-5556-5821
Copyright, Publisher and Additional Information:	© The Author(s) 2025. Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Keywords:	Materials chemistry; Materials science
Dates:	Published: 15 January 2025 Published (online): 15 January 2025 Accepted: 1 January 2025
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > School of Chemical, Materials and Biological Engineering
Funding Information:	Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/N017374/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/S012400/1 Engineering and Physical Sciences Research Council EP/V035215/1 Engineering and Physical Sciences Research Council EP/T011424/1
Depositing User:	Symplectic Sheffield
Date Deposited:	20 Jan 2025 16:29
Last Modified:	20 Jan 2025 16:29
Status:	Published
Publisher:	Springer Science and Business Media LLC
Refereed:	Yes
Identification Number:	10.1038/s41529-025-00552-3
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:221997

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The effectiveness of TRIS and ammonium buffers in glass dissolution studies: a comparative analysis

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