title: Selective separation of radio-cesium from acidic solutions using supported liquid membrane containing chlorinated cobalt dicarbollide (CCD) in phenyltrifluoromethyl sulphone (PTMS).
abstract: A supported liquid membrane method was developed using chlorinated cobalt dicarbollide (CCD) in phenyltrifluoromethyl sulphone (PTMS) as the carrier, impregnated in PTFE flat sheet membranes for the selective separation of Cs(I) from nitric acid feed solution. Solvent extraction studies were carried out for optimizing the feed as well as strip conditions. >95% Facilitated transport of Cs(I) was observed in about 3h when 1M HNO(3) and 8M HNO(3) were used as the feed and strip solutions, respectively while 0.025M CCD in PTMS was used as the carrier extractant. Selectivity studies, carried out using a mixture of radiotracers viz. (51)Cr, (59)Fe, (99)Mo, (99m)Tc, (106)Ru, (137)Cs, (152)Eu and (241)Am, indicated selective transport of Cs(I) with DF values >100. Though reproducibility of the transport data was excellent when carried out in two successive transport experiments with freshly loaded carrier solvent, the stability of the membrane was poor which restricts its long term use.
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Mohapatra
authors.forename: A
authors.initials: A
authors.lastname: Bhattacharyya
authors.forename: V K
authors.initials: VK
authors.lastname: Manchanda
mesh_terms: D000143:Acids; D002588:Cesium Radioisotopes / Q000302:isolation & purification*; D008567:Membranes, Artificial; D015203:Reproducibility of Results; D012996:Solutions
chemical_list: D000143:Acids; D002588:Cesium Radioisotopes; D008567:Membranes, Artificial; D012996:Solutions