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Title: Treatment and disposal options for a heavy metals waste containing soluble Technetium-99

Abstract

Various equipment decontamination and uranium recovery operations at the Portsmouth Gaseous Diffusion Plant generate a so-called ''raffinate'' waste stream characterized by toxic heavy metals, high concentrations of nitric aced, and low levels of radioactive nuclides (/sup 235/U and /sup 99/Tc). Dilution and adjustment of solution pH to a value of 8.2 to 8.5 precipitates the heavy metals that can be hydrolyzed, which are concentrated by paper filtration to yield a filter cake designed as heavy metals sludge (HMS) and HMS filtrate. The HMS fraction may be incorporated into cement-based grout containing ground blast furnace slag to dramatically reduce the mobility of its toxic and radioactive components. Sorption of soluble mercury, pertechnetate, and nitrate anions from the HMS filtrate was tested using organic resins and inorganic sorbents. Removal of Hg and /sup 99/Tc by ironing filings is efficient and economical, generating a small volume of spent sorbent amenable to co-disposal with HMS in a grout waste form. When a more rapid sorption is required, poly-4- vinylpyridine resin is very effective for the removal of soluble /sup 99/Tc, with little uptake of interfering anions at near-neutral influent pH values. 37 refs., 8 figs., 6 tabs.

Authors:
; ; ;
Publication Date:
Research Org.:
Oak Ridge Gaseous Diffusion Plant, TN (USA)
OSTI Identifier:
5746362
Report Number(s):
K/QT-230-R
ON: DE89016576
DOE Contract Number:  
AC05-84OT21400
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; CHEMICAL EFFLUENTS; SOLIDIFICATION; RADIOACTIVE EFFLUENTS; SLUDGES; GROUTING; LIQUID WASTES; MERCURY; PORTSMOUTH CENTRIFUGE ENRICHMENT PLANT; RESINS; WASTE FORMS; CENTRIFUGE ENRICHMENT PLANTS; ELEMENTS; INDUSTRIAL PLANTS; ISOTOPE SEPARATION PLANTS; MATERIALS; METALS; NUCLEAR FACILITIES; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHASE TRANSFORMATIONS; POLYMERS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; WASTES; 052001* - Nuclear Fuels- Waste Processing; 053000 - Nuclear Fuels- Environmental Aspects

Citation Formats

Bostick, W D, Shoemaker, J L, Osborne, P E, and Evans-Brown, B. Treatment and disposal options for a heavy metals waste containing soluble Technetium-99. United States: N. p., 1989. Web.
Bostick, W D, Shoemaker, J L, Osborne, P E, & Evans-Brown, B. Treatment and disposal options for a heavy metals waste containing soluble Technetium-99. United States.
Bostick, W D, Shoemaker, J L, Osborne, P E, and Evans-Brown, B. Tue . "Treatment and disposal options for a heavy metals waste containing soluble Technetium-99". United States.
@article{osti_5746362,
title = {Treatment and disposal options for a heavy metals waste containing soluble Technetium-99},
author = {Bostick, W D and Shoemaker, J L and Osborne, P E and Evans-Brown, B},
abstractNote = {Various equipment decontamination and uranium recovery operations at the Portsmouth Gaseous Diffusion Plant generate a so-called ''raffinate'' waste stream characterized by toxic heavy metals, high concentrations of nitric aced, and low levels of radioactive nuclides (/sup 235/U and /sup 99/Tc). Dilution and adjustment of solution pH to a value of 8.2 to 8.5 precipitates the heavy metals that can be hydrolyzed, which are concentrated by paper filtration to yield a filter cake designed as heavy metals sludge (HMS) and HMS filtrate. The HMS fraction may be incorporated into cement-based grout containing ground blast furnace slag to dramatically reduce the mobility of its toxic and radioactive components. Sorption of soluble mercury, pertechnetate, and nitrate anions from the HMS filtrate was tested using organic resins and inorganic sorbents. Removal of Hg and /sup 99/Tc by ironing filings is efficient and economical, generating a small volume of spent sorbent amenable to co-disposal with HMS in a grout waste form. When a more rapid sorption is required, poly-4- vinylpyridine resin is very effective for the removal of soluble /sup 99/Tc, with little uptake of interfering anions at near-neutral influent pH values. 37 refs., 8 figs., 6 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5746362}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {8}
}

Technical Report:
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