Cesium supported liquid membranes

Dozol, J.-F., Casas, J., Sastre, A. M., Transport of cesium from reprocessing concentrate solutions through flat-sheet-supported liquid membranes Influence of the extractant, Sep. Sci. Technol, 30, 435-448,1995. [Pg.291]

Mohapatra, P.K. Lakshmi, D.S. Mohan, D. Manchanda, V.K. Selective transport of cesium using a supported liquid membrane containing di-t-butyl benzo 18 crown 6 as the carrier, J. Membr. Sci. 232 (2004) 133-139. [Pg.116]

Transport of Cesium by Means of Supported Liquid Membranes (SLM)... [Pg.225]

Permeability of Cesium through Supported Liquid Membranes... [Pg.228]

Z. Asfari, C. Bressot, J. Vicens, C. Hill, J.-F. Dozol, H. Rouquette, S. Eymard, V. Lamare and B. Tournois, Cesium Removal from Nuclear Waste Water by Supported Liquid Membranes Containing Calix-bis-brown Compounds, in ACS Symposium Series 642 (Anaheim CA, April 2-6, 1995), eds. R. A. Bartsch and J. D. Way, American Chemical Society, Washington, DC, Editon edn., 1996, pp. 376-390. [Pg.313]

Asfari, Z., Bressot, C., Vicens, J., Hill, C., Dozol, J.-F., Rouquette, H., Eymard, S., Lamare, V., Toumois, B. Doubly Crowned Calix[4]arenes in the 1,3-Altemate Conformation as Cesium-Selective Carriers in Supported Liquid Membranes. Anal. Chem. 67 (1995), 3133-3139. [Pg.401]

Mohapatra, P.K., Bhattacharyya, A., Manchanda, V.K., Selective separation of radio-cesium from acidic solutions using supported liquid membrane containing chlorinated cobalt dicarbollide (CDD) in phenyltrifluoromethyl sulphone (PTMS), J. Hazard. Mater. 181, 679, 2010. [Pg.705]

Kandwal, R, Ansari, S.A., and Mohapatra, P.K. 2011. Transport of cesium using hollow fiber supported liquid membrane containing calix[4]arene-bis(2,3-naphtho)crown-6 as the carrier extractant Part II. Recovery from simulated high level waste and mass transfer modeling. J. Membr. Sci. 384 37 3. [Pg.810]

J.K. Kim, J.S. Kim, Y.G. Shul, K.W. Lee, and W.Z. Oh. Selective extraction of cesium ion with calix[4]arene crown ether through thin sheet supported liquid membranes. Journal of Membrane Science 187 3-11, 2001. [Pg.307]

Vicens and coworkers (Chapter 26) report the use of novel calix-fcw-crown ether compounds as carriers in a supported liquid membrane system for the removal of cesium from nuclear waste water. Decontamination factors of greater than 20 are obtained in the treatment of synthetic acidic radioactive wastes. Very good stability (over 50 days) and high decontamination yields are achieved. [Pg.11]

Cesium Removal from Nuclear Waste Water by Supported Liquid Membranes Containing Calix-bis-crown Compounds... [Pg.376]

Calix[4]-W5-crowns 1-7 are used as selective cesium-carriers in supported liquid membranes (SLMs). Application of the D esi diffusional model allows the transport isotherms of trace level Cs through SLMs (containing calix[4]-6/5-crowns) to be determined as a function of the ionic concentration of the aqueous feed solutions. Compound 5 appears to be much more efficient than mixtures of crown ethers and acidic exchangers, especially in very acidic media. Decontamination factors greater than 20 are obtained in the treatment of synthetic acidic radioactive wastes. Permeability coefficient measurements are conducted for repetitive transport experiments in order to determine the SMLs stability with time. Very good results (over 50 days of stability) and high decontamination yields are observed with l,3-calfac[4]-Aw-crowns 5 and 6. [Pg.376]

Cesium Transport Through Supported Liquid Membranes (SLMs). [Pg.381]

The use of 13a in the extraction process or in the transport through supported liquid membranes (SLMs) allows to recover more than 98% of the cesium cation present in solution, making this derivative extremely attractive for declassification of nuclear wastes. Ligand 13a was dso used for the selective detection of cesium in ISEs and ISFETs with very high selectivity and low detection limit. Very recently, we anchored calix[4]arene-crown-5 and -crown-6 derivatives on silica-gel via hydrosilanization and we were able to separate by chromatography potassium or cesium fi"om other alkali metal ions with high efficiency. ... [Pg.72]

Abstract. The synthesis of 1,2- and l,3-calix[4]-Z w-crowns, double calix[4]arenes and double calixcrowns have been shown to depend on the reaction conditions (nature of the base, structure of the ditosylates, and the stoichiometry of the reactants). The 1,3-altemate conformation of the 1,3-calix[4]- w-crowns was shown to be favourable to the selective complexation of cesium cation. The observed Na /Cs selectivity was exploited in separation processes using them as carriers in transport through supported liquid membranes (SLMs). The best Na "/Cs selectivity (1/45 000) was observed for the naphthyl derivative 7. Calix(aza)crowns and 1,3-calix[4]-/ w-(aza)-crowns were also produced through the preliminary formation of the Schiff base-calixarenes, which were further hydrogenated. The syntheses consisted of the 1,3-selective alkylation of calixarenes followed by cyclization into a 1,3-bridged calixarene or by the direct 1,3-capping of the calixarene with appropriate ditosylates. Soft metal complexation by these ligands is also presented. [Pg.137]

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