Coflotation of ¹³⁴Cs from Radioactive Process Waste Water

Abstract

Cesium, coprecipitated with copper ferrocyanide, can be readily removed from radioactive process waste water using sodium lauryl sulphate (NaLS), cetyl trimethyl ammonium bromide (CTAB) or gelatin (Gl) as collector. In addition to the effect of the collector type on the percentage removal and volume reduction, the effects of the pH of three distinct Cu 2 + : Fe(CN)J ~ ratios and of different ageing periods of the cesium-copper ferrocyanide-water systems have been established. With NaLS, CTAB and Gl successful removals could be achieved in the pH ranges 3-7.5, 5.0-10.5 and 5.5-9.0 respectively. The results are discussed in terms of the ionization of the active groups of the collectors and of the electrical state of the precipitate.

Sorptive flotation of Eu(III)-loaded clays from aqueous solutions

“…The flotation procedure and system used were previously described in detail (Shakir et al, 1987;Shakir et al, 1993). The flotation cell itself was made of G4 sintered glass disc of 3.6 cm diameter fused to a Pyrex glass column about 40 cm in height, drawn at the bottom into the form of a funnel.…”

Simultaneous removal of chromotrope 2B and radionuclides from mixed radioactive process wastewater using organo-bentonite

“…Of these wastes radioactive process wastewater (RPWW) is ordinarily produced at high rates. It is a dilute solution usually consisting of ordinary drinking water having a very low radioactivity level and containing small amounts of inorganic and organic laboratory chemicals [1,2]. In most cases, treatment of this water is concerned with removal of radionuclides only and other harmful pollutants are neglected though, from a safety point of view, it is of major importance to remove the harmful pollutants as well.…”

“…Because of very low concentrations, the radionuclides cannot be removed by the currently used drinking water purification techniques (chemical precipitation and flocculation). Also, other separation techniques including ion-exchange and reverse osmosis are not recommended since they are either time consuming or expensive or both [1]. In our laboratory, considerable effort has been devoted to develop methods for removal of radionuclides from radioactive process wastewater [1][2][3][4][5][6].…”

“…Also, other separation techniques including ion-exchange and reverse osmosis are not recommended since they are either time consuming or expensive or both [1]. In our laboratory, considerable effort has been devoted to develop methods for removal of radionuclides from radioactive process wastewater [1][2][3][4][5][6]. The studies have now been extended to treatment of mixed radioactive process wastewater (MRPWW) that is radioactive process wastewater which, in addition to being radioactive, contains chemically harmful contaminants.…”