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Title: Speciation, Dissolution, and Redox Reactions of Chromium Relevant to Pretreatment and Separation of High-Level Tank Wastes

Abstract

This proposed research builds on the fundamental data developed under former EMSP project (65368) and seeks to develop additional fundamental data for chromium (Cr) reactions that are not currently available but are essential for the processing of high-level waste (HLW). Our objectives are to study (1) the dissolution of several solid phases (e.g., CrOOH, Cr2O3(c), and Fe and Cr, binary hydroxides, identified to be important from sludge leaching studies) in highly alkaline solutions and in the presence of other electrolytes (e.g., carbonate, phosphate, sulfate, nitrite), and (2) the effect of the nature of Cr solid phases and aqueous species on their redox reactivity with a variety of potential oxidants (e.g., O2 and ferrate). This information will provide critical support for developing enhanced pretreatment strategies for removing Cr from HLW and will achieve a major cost reduction in HLW disposal.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab., Richland, WA; Lawrence Berkeley National Lab., Berkeley, CA; Washington State University, Pullman, WA (US)
Sponsoring Org.:
USDOE Office of Environmental Management (EM) (US)
OSTI Identifier:
834813
Report Number(s):
EMSP-81896-2002
R&D Project: EMSP 81896; TRN: US200433%%384
DOE Contract Number:  
FG07-01ER14930
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jun 2002
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; CHROMIUM; DISSOLUTION; ELECTROLYTES; HYDROXIDES; LEACHING; OXIDIZERS; PROCESSING; REDOX REACTIONS; SLUDGES; TANKS; WASTES

Citation Formats

Rai, Dhanpat, Rao, Lingeng, and Clark, Sue B. Speciation, Dissolution, and Redox Reactions of Chromium Relevant to Pretreatment and Separation of High-Level Tank Wastes. United States: N. p., 2002. Web. doi:10.2172/834813.
Rai, Dhanpat, Rao, Lingeng, & Clark, Sue B. Speciation, Dissolution, and Redox Reactions of Chromium Relevant to Pretreatment and Separation of High-Level Tank Wastes. United States. https://doi.org/10.2172/834813
Rai, Dhanpat, Rao, Lingeng, and Clark, Sue B. 2002. "Speciation, Dissolution, and Redox Reactions of Chromium Relevant to Pretreatment and Separation of High-Level Tank Wastes". United States. https://doi.org/10.2172/834813. https://www.osti.gov/servlets/purl/834813.
@article{osti_834813,
title = {Speciation, Dissolution, and Redox Reactions of Chromium Relevant to Pretreatment and Separation of High-Level Tank Wastes},
author = {Rai, Dhanpat and Rao, Lingeng and Clark, Sue B},
abstractNote = {This proposed research builds on the fundamental data developed under former EMSP project (65368) and seeks to develop additional fundamental data for chromium (Cr) reactions that are not currently available but are essential for the processing of high-level waste (HLW). Our objectives are to study (1) the dissolution of several solid phases (e.g., CrOOH, Cr2O3(c), and Fe and Cr, binary hydroxides, identified to be important from sludge leaching studies) in highly alkaline solutions and in the presence of other electrolytes (e.g., carbonate, phosphate, sulfate, nitrite), and (2) the effect of the nature of Cr solid phases and aqueous species on their redox reactivity with a variety of potential oxidants (e.g., O2 and ferrate). This information will provide critical support for developing enhanced pretreatment strategies for removing Cr from HLW and will achieve a major cost reduction in HLW disposal.},
doi = {10.2172/834813},
url = {https://www.osti.gov/biblio/834813}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {6}
}