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Title: Leaching Characteristics of Hanford Ferrocyanide Wastes

Abstract

A series of leach tests were performed on actual Hanford Site tank wastes in support of the Hanford Tank Waste Treatment and Immobilization Plant (WTP). The samples were targeted composite slurries of high-level tank waste materials representing major complex, radioactive, tank waste mixtures at the Hanford Site. Using a filtration/leaching apparatus, sample solids were concentrated, caustic leached, and washed under conditions representative of those planned for the Pretreatment Facility in the WTP. Caustic leaching was performed to assess the mobilization of aluminum (as gibbsite, Al[OH]3, and boehmite AlO[OH]), phosphates [PO43-], chromium [Cr3+] and, to a lesser extent, oxalates [C2O42-]). Ferrocyanide waste released the solid phase 137Cs during caustic leaching; this was antithetical to the other Hanford waste types studied. Previous testing on ferrocyanide tank waste focused on the aging of the ferrocyanide salt complex and its thermal compatibilities with nitrites and nitrates. Few studies, however, examined cesium mobilization in the waste. Careful consideration should be given to the pretreatment of ferrocyanide wastes in light of this new observed behavior, given the fact that previous testing on simulants indicates a vastly different cesium mobility in this waste form. The discourse of this work will address the overall ferrocyanide leaching characteristics asmore » well as the behavior of the 137Cs during leaching.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
972951
Report Number(s):
PNNL-SA-67098
Journal ID: ISSN 0888-5885; IECRED; 830403000; TRN: US1001562
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research, 49(4):1792-1798
Additional Journal Information:
Journal Volume: 49; Journal Issue: 4; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; AGING; ALUMINIUM; CESIUM; CHROMIUM; FERROCYANIDES; GIBBSITE; LEACHING; MIXTURES; NITRATES; NITRITES; OXALATES; PHOSPHATES; SLURRIES; TANKS; TESTING; WASTE FORMS; WASTE PROCESSING; WASTES; leaching characteristics

Citation Formats

Edwards, Matthew K, Fiskum, Sandra K, Peterson, Reid A, and Shimskey, Rick W. Leaching Characteristics of Hanford Ferrocyanide Wastes. United States: N. p., 2009. Web.
Edwards, Matthew K, Fiskum, Sandra K, Peterson, Reid A, & Shimskey, Rick W. Leaching Characteristics of Hanford Ferrocyanide Wastes. United States.
Edwards, Matthew K, Fiskum, Sandra K, Peterson, Reid A, and Shimskey, Rick W. 2009. "Leaching Characteristics of Hanford Ferrocyanide Wastes". United States.
@article{osti_972951,
title = {Leaching Characteristics of Hanford Ferrocyanide Wastes},
author = {Edwards, Matthew K and Fiskum, Sandra K and Peterson, Reid A and Shimskey, Rick W},
abstractNote = {A series of leach tests were performed on actual Hanford Site tank wastes in support of the Hanford Tank Waste Treatment and Immobilization Plant (WTP). The samples were targeted composite slurries of high-level tank waste materials representing major complex, radioactive, tank waste mixtures at the Hanford Site. Using a filtration/leaching apparatus, sample solids were concentrated, caustic leached, and washed under conditions representative of those planned for the Pretreatment Facility in the WTP. Caustic leaching was performed to assess the mobilization of aluminum (as gibbsite, Al[OH]3, and boehmite AlO[OH]), phosphates [PO43-], chromium [Cr3+] and, to a lesser extent, oxalates [C2O42-]). Ferrocyanide waste released the solid phase 137Cs during caustic leaching; this was antithetical to the other Hanford waste types studied. Previous testing on ferrocyanide tank waste focused on the aging of the ferrocyanide salt complex and its thermal compatibilities with nitrites and nitrates. Few studies, however, examined cesium mobilization in the waste. Careful consideration should be given to the pretreatment of ferrocyanide wastes in light of this new observed behavior, given the fact that previous testing on simulants indicates a vastly different cesium mobility in this waste form. The discourse of this work will address the overall ferrocyanide leaching characteristics as well as the behavior of the 137Cs during leaching.},
doi = {},
url = {https://www.osti.gov/biblio/972951}, journal = {Industrial and Engineering Chemistry Research, 49(4):1792-1798},
issn = {0888-5885},
number = 4,
volume = 49,
place = {United States},
year = {Mon Dec 21 00:00:00 EST 2009},
month = {Mon Dec 21 00:00:00 EST 2009}
}