The application of in situ formed mixed iron oxides in the removal of strontium and actinides from nuclear tank waste

H. A. Arafat; S. B. Aase; A. J. Bakel; D. L. Bowers; A. V. Gelis; M. C. Regalbuto; G. F. Vandegrift

doi:10.1002/aic.12197

The application of in situ formed mixed iron oxides in the removal of strontium and actinides from nuclear tank waste

H. A. Arafat, S. B. Aase, A. J. Bakel, D. L. Bowers, A. V. Gelis, M. C. Regalbuto, G. F. Vandegrift

Chemical and Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

This article discusses the experimental program conducted at Argonne National Laboratory to study the performance of in situ formed mixed iron oxides (IS-MIO) for the removal of strontium (Sr), plutonium (Pu), neptunium (Np), uranium (U), and americium (Am) from the Savannah River Site (SRS) radioactive tank waste. The boundaries for the experimental work were defined in collaboration with SRS. IS-MIO was actually found to be a mixture of Fe(II) and Fe(III) oxides and hydroxides, including magnetite. Decontamination factor (DF) values were measured for both IS-MIO and monosodium titanate (MST), the baseline sorbent used by SRS. DF values for IS-MIO were found to be superior to MST for all isotopes studied. DF values for Pu, Np, and Sr, achieved within 30 min of IS-MIO formation were orders of magnitude larger than the needed values. DF values for U and Am were less than the former three but still acceptable, and greater than MST.

Original language	British English
Pages (from-to)	3012-3020
Number of pages	9
Journal	AIChE Journal
Volume	56
Issue number	11
DOIs	https://doi.org/10.1002/aic.12197
State	Published - Nov 2010

Keywords

Decontamination
High-level waste
Iron oxide
Savannah River Site
Strontium
Tank waste
TRU elements

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title = "The application of in situ formed mixed iron oxides in the removal of strontium and actinides from nuclear tank waste",

abstract = "This article discusses the experimental program conducted at Argonne National Laboratory to study the performance of in situ formed mixed iron oxides (IS-MIO) for the removal of strontium (Sr), plutonium (Pu), neptunium (Np), uranium (U), and americium (Am) from the Savannah River Site (SRS) radioactive tank waste. The boundaries for the experimental work were defined in collaboration with SRS. IS-MIO was actually found to be a mixture of Fe(II) and Fe(III) oxides and hydroxides, including magnetite. Decontamination factor (DF) values were measured for both IS-MIO and monosodium titanate (MST), the baseline sorbent used by SRS. DF values for IS-MIO were found to be superior to MST for all isotopes studied. DF values for Pu, Np, and Sr, achieved within 30 min of IS-MIO formation were orders of magnitude larger than the needed values. DF values for U and Am were less than the former three but still acceptable, and greater than MST.",

keywords = "Decontamination, High-level waste, Iron oxide, Savannah River Site, Strontium, Tank waste, TRU elements",

author = "Arafat, {H. A.} and Aase, {S. B.} and Bakel, {A. J.} and Bowers, {D. L.} and Gelis, {A. V.} and Regalbuto, {M. C.} and Vandegrift, {G. F.}",

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AU - Aase, S. B.

AU - Bakel, A. J.

AU - Bowers, D. L.

AU - Gelis, A. V.

AU - Regalbuto, M. C.

AU - Vandegrift, G. F.

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N2 - This article discusses the experimental program conducted at Argonne National Laboratory to study the performance of in situ formed mixed iron oxides (IS-MIO) for the removal of strontium (Sr), plutonium (Pu), neptunium (Np), uranium (U), and americium (Am) from the Savannah River Site (SRS) radioactive tank waste. The boundaries for the experimental work were defined in collaboration with SRS. IS-MIO was actually found to be a mixture of Fe(II) and Fe(III) oxides and hydroxides, including magnetite. Decontamination factor (DF) values were measured for both IS-MIO and monosodium titanate (MST), the baseline sorbent used by SRS. DF values for IS-MIO were found to be superior to MST for all isotopes studied. DF values for Pu, Np, and Sr, achieved within 30 min of IS-MIO formation were orders of magnitude larger than the needed values. DF values for U and Am were less than the former three but still acceptable, and greater than MST.

AB - This article discusses the experimental program conducted at Argonne National Laboratory to study the performance of in situ formed mixed iron oxides (IS-MIO) for the removal of strontium (Sr), plutonium (Pu), neptunium (Np), uranium (U), and americium (Am) from the Savannah River Site (SRS) radioactive tank waste. The boundaries for the experimental work were defined in collaboration with SRS. IS-MIO was actually found to be a mixture of Fe(II) and Fe(III) oxides and hydroxides, including magnetite. Decontamination factor (DF) values were measured for both IS-MIO and monosodium titanate (MST), the baseline sorbent used by SRS. DF values for IS-MIO were found to be superior to MST for all isotopes studied. DF values for Pu, Np, and Sr, achieved within 30 min of IS-MIO formation were orders of magnitude larger than the needed values. DF values for U and Am were less than the former three but still acceptable, and greater than MST.

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KW - High-level waste

KW - Iron oxide

KW - Savannah River Site

KW - Strontium

KW - Tank waste

KW - TRU elements

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The application of in situ formed mixed iron oxides in the removal of strontium and actinides from nuclear tank waste

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