EVALUATION OF THE SREX SOLVENT-EXTRACTION PROCESS FOR THE REMOVAL OF SR-90 AND HAZARDOUS METALS FROM ACIDIC NUCLEAR WASTE SOLUTIONS CONTAINING HIGH-CONCENTRATIONS OF INTERFERING ALKALI-METAL IONS

Authors
WOOD DJ LAW JD
Citation
Dj. Wood et Jd. Law, EVALUATION OF THE SREX SOLVENT-EXTRACTION PROCESS FOR THE REMOVAL OF SR-90 AND HAZARDOUS METALS FROM ACIDIC NUCLEAR WASTE SOLUTIONS CONTAINING HIGH-CONCENTRATIONS OF INTERFERING ALKALI-METAL IONS, Separation science and technology, 32(1-4), 1997, pp. 241-253
Citations number
6
Categorie Soggetti
Engineering, Chemical",Chemistry
Journal title
Separation science and technology → ACNP
ISSN journal
01496395
Volume
32
Issue
1-4
Year of publication
1997
Pages
241 - 253
Database
ISI
SICI code
0149-6395(1997)32:1-4<241:EOTSSP>2.0.ZU;2-Y
Abstract
The SREX process, which was developed at Argonne National Laboratories , has been evaluated for its effectiveness for the decontamination of radioactive liquid waste at the Idaho Chemical Processing Plant locate d at the Idaho National Engineering Laboratory. The extraction solvent consists of 0.15 M 4',4',(5')-di-(t-butyl-dicyclohexo)-18-crown-6 in either 1.2 (M) under bar TBP/Isopar L(R). Suppressed extraction due to matrix interferences limits D-Sr values to the range of 3-4 in batch extraction experiments. The SREX solvent has been shown to be effectiv e in the removal of non-radioactive Pb from liquid wastes, in addition to the extraction of Sr-90. The information from this study has been used to develop a proposed flowsheet for the treatment of liquid waste in centrifugal contactors.