Investigation of a precise static leach test for the testing of simulated nuclear waste materials

Kingston, H. M.; Cronin, David J.; Epstein, Michael

doi:10.1016/0191-815x(84)90003-2

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…Aware of the effects of surface finish on the test result, they ground all test specimens to a 600-grit final finish to improve the uniformity of the samples. They determined that "all the imprecision contributed by the test parameters and the glass samples combined was found to be insignificant compared to the analytical technique used for leachate analysis under these conditions" [90]. Analytical error is typically near 10-15% of the amount present for multicomponent analyses required during the performance of these tests.…”

Section: 5mentioning

confidence: 99%

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The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Ebert

1995

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Argonne National Lahoratory. wi1th facilitie, in the states of liiinois and Idaho. is owned by the united States govern lent, and operated by The Un diversity of Chicago under the provisions of a contract with thie department of Enery. DISCLAIM ER THE FFFECTS OF THE GLASS SURFACE AREA/SOLUTION VOLUME RATIO ON GLASS CORROSION: A CRITICAL REVIEW William L. Ebert ABSTRACTThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume (SA/V) ratio on the corrosion behavior of borosilicate waste glasses. The SA/V ratio affects the rate of glass corrosion through the extent of dilution ok corrosion products released from the glass into the leachate solution: glass corrosion products are diluted more in tests conducted at low SA/V ratios than they are in tests conducted at high SAN ratios. Differences in the solution chemistries generated in tests conducted at different SA/V ratios then affect the observed glass corrosion behavior. Corrosion of borosilicate waste glasses results in the dissolution of soluble components and the accumulation of sparingly soluble components in a layer on the surface of the corroding glass. Laboratory tests performed to distinguish the effects of the solution chemistry and the surface layer on the glass corrosion rate have shown the rate to be controlled primarily by the solution chemistry. Therefore, any testing parameter that affects the solution chemistry will also affect the glass corrosion rate. The results of static leach tests conducted to assess the effects of the SAN are discussed with regard to the effects of SAN on the solution chemistry. The effects of the SA/V ratio observed in static tests can be understood based on the effects of the solution chemistry on glass corrosion behavior. Test results show several remaining issues with regard to the long-term glass corrosion behavior: Can the SAN ratio be used as an accelerating parameter to characterize the advanced stages of glass corrosion relevant to long disposal times? Is the alteration of the glass surface the same in tests conducted at different SAN, and in tests conducted with monolithic and crushed glass samples? What are the effects of the SAN and the extent of glass corrosion on the disposition of released radionuclides? These issues will bear on the prediction of the long-term performance of waste glasses during storage. The results of an experimental program conducted at ANL to address these and other remaining issues regarding the effects of SA/V on glass corrosion are described. I 2 SUMMARYThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume ratio (SA/V) on the corrosion behavior of borosilicate waste glasses. The effects of the SA/ occur through dilution of corrosion products and through the effects of the corrosion products on the glass corrosion mechanism and rate. Therefore, the effects of the SA/V on glass corrosion are discussed in terms of the various effects of t...

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Section: 5mentioning

confidence: 99%

“…The precision of the MCC-1 test method was evaluated by Kingston et al by testing glasses with tightly controlled key procedural steps and experimental conditions [90]. Aware of the effects of surface finish on the test result, they ground all test specimens to a 600-grit final finish to improve the uniformity of the samples.…”

Section: 5mentioning

confidence: 99%

The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Ebert

1995

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“…Pyrex bottles generate some Na' (Fig. 2), which is expected, since it is well known that water easily leaches out sodium from glass, especially at high temperature (5,6).…”

Section: Ionic Contaminationmentioning

confidence: 63%

“…The elementary impurity content is usually measured by atomic absorption or, sometimes, by neutron activation analysis (NAA) (2,3). However, little data exist on the ionic state of polymer impurities (3,5). Fluoride ions have been detected in the water contained in Teflon-FEP bottles irradiated by UV light (4) but, to the best of our knowledge, thermally-generated fluoride ions in this polymer have never been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Fluoride ions have been detected in the water contained in Teflon-FEP bottles irradiated by UV light (4) but, to the best of our knowledge, thermally-generated fluoride ions in this polymer have never been reported. Kingston, et al (5) have measured fluoride ions in perfluoralkoxy (PFA)-Teflon bottles filled with water and glasses but they did not report the time and temperature dependence of fluoride generation. This paper reports ionic-content measurements performed in water contained in different plastic and Pyrex bottles.…”

Section: Introductionmentioning

confidence: 99%

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Ionic impurities in water contained in plastic and pyrex bottles

Crine

1987

Polymer Engineering & Sci

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It is shown that most of the impurities in plastic bottles are not extracted by the water contained in these bottles. However, in the presence of water ions can easily be generated at 22 and 75°C in polyethylene, polypropylene, Teflon-FEP, and Pyrex bottles. Surprisingly, relatively large amounts of fluoride ions are extracted from Teflon-FEP bottles which contain very few contaminants. These ions greatly affect the electrical conductivity of the water which is linearly related to the ionic content. The plastic bottles containing the lowest ionic contents are those made in polypropylene and polyethylene. Sodium ions are also measured in the water contained in Pyrex bottles. It is also shown that acid rinsing of plastic containers is not a recommended cleaning technique.

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Considerations in the determination of boron at low concentrations

Downing¹,

Strong²,

Hovanec

et al. 1998

Biol Trace Elem Res

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Experimental evidence now supports the nutritional essentiality of boron (B) in some biological systems, and accordingly, the need for reliable analytical B data is increasing. However, the accurate determination of B in biological materials is a formidable challenge at low concentrations (<1 mg B/kg). Recent studies still show significant analytical discrepancies in the analysis of animal tissues and fluids, despite the development of instrumental techniques such as TIMS, ICP-MS, ICP-ES, ICAP, SIMS, NA-MS, PGAA, NRA, and so forth, which have demonstrated detection limits approaching or exceeding (microg B/kg concentrations. Since boric acid is both volatile and ubiquitous in nature, the chemical and physical pathways for B contamination and its loss are manifold, especially during sample preparation. An added obstacle is the inadequacy of biological reference materials certified for B below mg B/kg. With an emphasis toward sample preparation and ICP-MS analysis, examples are provided in this article to help the analyst avoid common problems associated with the analysis of B from biological sources. Topics that are discussed include contamination from Teflon vessels during microwave digestion, losses owing to freeze-drying, B isotopic variations, standards preparation, reagent backgrounds, and instrumental interferences.

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Investigation of a precise static leach test for the testing of simulated nuclear waste materials

Cited by 7 publications

References 4 publications

The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Ionic impurities in water contained in plastic and pyrex bottles

Considerations in the determination of boron at low concentrations

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