Method for treating liquid wastes

Title: Method for treating liquid wastes

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The method of treating liquid waste in a media is accomplished by exposing the media to phosphinimines and sequestering {sup 99}Tc from the media by the phosphinimine (PN) functionalities. The system for treating the liquid waste in the media includes extraction of {sup 99}TcO{sub 4}{sup {minus}} from aqueous solutions into organic solvents or mixed organic/polar media, extraction of {sup 99}Tc from solutions on a solid matrix by using a container containing PN functionalities on solid matrices including an inlet and outlet for allowing flow of media through an immobilized phosphinimine ligand system contained within the container. Also, insoluble suspensions of phosphinimine functionalities on solid matrices in liquid solutions or present on supported liquid membranes (SLM) can be used to sequester {sup 99}Tc from those liquids. 6 figs.

Inventors:: Katti, K.V.; Volkert, W.A.; Singh, P.; Ketring, A.R.

Issue Date:: 1995-12-26

OSTI Identifier:: 170446

Assignee:: Univ. of Missouri, Columbia, MO (United States) PTO; SCA: 052001; PA: EDB-96:025316; SN: 96001517602

Patent Number(s):: US 5,478,474/A/

Application Number:: PAN: 8-165,373; TRN: 96:006142

Contract Number:: FG02-89ER60875

Resource Relation:: Other Information: PBD: 26 Dec 1995

Research Org:: University of Missouri

Country of Publication:: United States

Language:: English

Subject:: 05 NUCLEAR FUELS; LIQUID WASTES; RADIOACTIVE WASTE PROCESSING; TECHNETIUM; CHEMISORPTION; TECHNETIUM OXIDES; SOLVENT EXTRACTION; TECHNETIUM 99; IMINES; ORGANIC PHOSPHORUS COMPOUNDS; MEMBRANE TRANSPORT

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