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Title: THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR WASTE SOLUTIONS BY FOAM SEPARATION. Final Report

Abstract

The removal of cesium, strontium, and rare earth cations from dilute aqueous solutions by adsorption on foam surfaces was studied. The primary objective in the study was to determine the technical feasibility of a foam separation process for the removal of specific nuclides from nuclear process streams. Foam separation takes advantage of the concentration difference existing between the surface layers and the bulk regions of solutions containing surface active solutes. Enrichment of non-surface active materials, such as cations and arions, at the air-water interface may be achieved by complexing these materials into a surface active form. Equilibrium surface adsorption coefficients, GAMMA /C, were determined for cesium, strontium, and samarium in 10/sup -5/M solutions combined with various surface active agents. Among those studied, the foaminB agents that showed best selectivity for strontium and samarium were the amino polycarboxylic acids. Promising cesium enrichments were obtained using a combination of an amino polycarboxylic acid and sodium tetraphenyl boron. The equilibrium surface adsorption was found to depend upon the type of foaming agent, the foaming agent concentration, the metal non concentration, pH, the inert salt (NaNO/sub 3/) concentration, and the temperature. Continuous separation of strontium and samarium from 10/sup -5/M aqueous solutions containing lMmore » sodium nitrate was studied in experimental countercurrent foam columns. Decontamination values of 400 to 7OO were demonstrated for strontium and samarium in a single pass through a three foot foam column, with corresponding volume reductions of 100 to 400 without evaporation. Decontamination values for strontium in the order of 10/sup 4/ to lO/sup 7/ were observed in a four column series set up. A study of the effect of the continuous column operating variables, such as liquid and gas flow rates, foam bubble size, column dimensions and temperature, on the separation efficiency was conducted. It was concluded that the degree of metal ion separation is primarily dependent on three factors: the equilibrium distribution coefficient, the ratio of the surface area generated to the liquid feed rate, and the height of the foam column. The experimental results indicate that the performance of a continuous countercurrent foam column can be quantitatively described by a Kremser or Colburn type of relationship, commonly employed in the design of conventional mass transfer unit operations. Relationships of this type were derived from a mathematical analysis of a foam column model. (auth)« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Radiation Applications Inc., New York
OSTI Identifier:
4043689
Report Number(s):
NYO-9577
NSA Number:
NSA-15-015319
DOE Contract Number:  
AT(30-1)-2093
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
United States
Language:
English
Subject:
WASTE DISPOSAL AND PROCESSING; ADSORPTION; AIR; AMINO ACIDS; ANIONS; BORON; CATIONS; CESIUM; COMPLEXES; COUNTER CURRENT; DECONTAMINATION; EFFICIENCY; ENRICHMENT; EQUILIBRIUM; FOAMS; GAS FLOW; LIQUID FLOW; MATHEMATICS; NUCLEI; ORGANIC COMPOUNDS; RARE EARTHS; SAMARIUM; SEPARATION PROCESSES; SODIUM; SODIUM NITRATES; STRONTIUM; SURFACES; TEMPERATURE; WASTE SOLUTIONS; WATER

Citation Formats

Schonfeld, E, Sanford, R, Mazzella, G, Ghosh, D, and Mook, S. THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR WASTE SOLUTIONS BY FOAM SEPARATION. Final Report. United States: N. p., 1960. Web.
Schonfeld, E, Sanford, R, Mazzella, G, Ghosh, D, & Mook, S. THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR WASTE SOLUTIONS BY FOAM SEPARATION. Final Report. United States.
Schonfeld, E, Sanford, R, Mazzella, G, Ghosh, D, and Mook, S. Fri . "THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR WASTE SOLUTIONS BY FOAM SEPARATION. Final Report". United States.
@article{osti_4043689,
title = {THE REMOVAL OF STRONTIUM AND CESIUM FROM NUCLEAR WASTE SOLUTIONS BY FOAM SEPARATION. Final Report},
author = {Schonfeld, E and Sanford, R and Mazzella, G and Ghosh, D and Mook, S},
abstractNote = {The removal of cesium, strontium, and rare earth cations from dilute aqueous solutions by adsorption on foam surfaces was studied. The primary objective in the study was to determine the technical feasibility of a foam separation process for the removal of specific nuclides from nuclear process streams. Foam separation takes advantage of the concentration difference existing between the surface layers and the bulk regions of solutions containing surface active solutes. Enrichment of non-surface active materials, such as cations and arions, at the air-water interface may be achieved by complexing these materials into a surface active form. Equilibrium surface adsorption coefficients, GAMMA /C, were determined for cesium, strontium, and samarium in 10/sup -5/M solutions combined with various surface active agents. Among those studied, the foaminB agents that showed best selectivity for strontium and samarium were the amino polycarboxylic acids. Promising cesium enrichments were obtained using a combination of an amino polycarboxylic acid and sodium tetraphenyl boron. The equilibrium surface adsorption was found to depend upon the type of foaming agent, the foaming agent concentration, the metal non concentration, pH, the inert salt (NaNO/sub 3/) concentration, and the temperature. Continuous separation of strontium and samarium from 10/sup -5/M aqueous solutions containing lM sodium nitrate was studied in experimental countercurrent foam columns. Decontamination values of 400 to 7OO were demonstrated for strontium and samarium in a single pass through a three foot foam column, with corresponding volume reductions of 100 to 400 without evaporation. Decontamination values for strontium in the order of 10/sup 4/ to lO/sup 7/ were observed in a four column series set up. A study of the effect of the continuous column operating variables, such as liquid and gas flow rates, foam bubble size, column dimensions and temperature, on the separation efficiency was conducted. It was concluded that the degree of metal ion separation is primarily dependent on three factors: the equilibrium distribution coefficient, the ratio of the surface area generated to the liquid feed rate, and the height of the foam column. The experimental results indicate that the performance of a continuous countercurrent foam column can be quantitatively described by a Kremser or Colburn type of relationship, commonly employed in the design of conventional mass transfer unit operations. Relationships of this type were derived from a mathematical analysis of a foam column model. (auth)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {7}
}

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