Solvent extraction recovery of byproduct TXCs and ZSr from HNO3 solutions-a technology review and assessment
A principal purpose of this paper is to call out what is perceived to be a timely need for increased research to develop improved and new solvent extraction technology for recovery of TXCs and ZSr from strong (greater than or equal to0.5M HNO3) acid media, technology which can be quickly scaled up to routine plant-scale operation with highly radioactive waste solutions when needed. The present and forseeable future (2020) US inventory of TXCs and ZSr is listed; much of this inventory is expected to be available only in strongly acidic nuclear waste solutions. Comparison of available methods - precipitation and ion exchange as well as solvent extraction - for recovering TXCs and ZSr from alkaline and acid media demonstrates, as expected, that very limited technology is available for use with strongly acidic solutions. Solvent extraction procedures which employ either macrocyclic polyethers (crown ethers) or dicarbolide, H )( -(3)-1, 2-B9C2H11Cl2)2Co) , to extract TXCs and ZSr from greater than or equal to0.5M HNO3 solutions have recently been proposed. But in their present state of development, both the crown ether and dicarbolide extraction processes have several drawbacks and/or unknowns. Thus, the present results should be considered as a springboard and a spur not only to further development and testing of these particular compounds, but also to continue the search for other extractants which offer even greater potential for plant-scale recovery of byproduct cesium and strontium from acidic wastes.
- Research Organization:
- Rockwell Hanford Operations, Richland, WA
- OSTI ID:
- 6425956
- Report Number(s):
- CONF-851011-; TRN: 87-028362
- Journal Information:
- Sep. Sci. Technol.; (United States), Vol. 22:2/3; Conference: 4. symposium on separation science and technology for energy applications, Knoxville, TN, USA, 20 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CESIUM 137
SOLVENT EXTRACTION
ORGANIC SOLVENTS
SOLVENT PROPERTIES
POLYETHYLENE GLYCOLS
TECHNOLOGY ASSESSMENT
STRONTIUM 90
BASES
MATERIALS RECOVERY
ALCOHOLS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
EVEN-EVEN NUCLEI
EXTRACTION
GLYCOLS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MANAGEMENT
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
PROCESSING
RADIOISOTOPES
RECOVERY
SEPARATION PROCESSES
SOLVENTS
STRONTIUM ISOTOPES
WASTE MANAGEMENT
WASTE PROCESSING
YEARS LIVING RADIOISOTOPES
400105* - Separation Procedures
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
052001 - Nuclear Fuels- Waste Processing