The sorption of radiostrontium on hydrated titanium(IV) oxide was studied in batch equilibration experiments. The strontium uptake capacity was determined. Batch distribution coefficients were measured as function of solution pH as well as strontium and sodium concentration. The effect of electron beam irradiation on strontium sorption was also examined. The results are of significance in connection with the removal of radiostrontium traces from alkaline sodium salt-loaded wastes of reprocessing plant origin.
The potential of hydrated titanium(IV) oxide as a granular inorganic sorbent for radiostrontium was studied by carrying out laboratory-scale column experiment. The feed to the column was a simulated waste solution of reprocessing plant origin. The breakthrough curve for removal of radiostrontium was determined. High decontamination factors were obtained for thousands of bed volumes. The column loading results were correlated with batch distribution data.
A locally produced mordenite type synthetic zeolite and its modified form obtained by the treatment with dilute hydrochloric
acid were tested for their cesium uptake characteristics. The two zeolites were compared with other commercially available
synthetic zeolites with respect to their ability to sorb radiocesium from dilute nitric acid solution. The effects of the
changes in the composition of the solution including the concentration of nitric acid, sodium and cesium on the uptake of
cesium were investigated. The results can be used in the removing processor radiocesium from different types of nuclear plant
effluents by these zeolites.
The inorganic sorbent potassium cobalt(II) hexacyanoferrate(II) was tested for removal of radiocesium from alkaline salt solutions that are typical of intermediate level radioactive wastes generated at spent fuel reprocessing plants in India. Excellent results were obtained both in batch equilibration and column operation.
Authors:V. Ramachandhran, S. Samanta, and B. Misra
Complexation aided ultrafiltration (CAUF) is an attractive separation process for the removal of trace toxic elements from
effluents at low pressures. Freshly prepared polysulfone, polyamide, polyamide hydrazide and polyvinyl butyral blended cellulose
acetate membranes are studied with respect to the separation behavior for radioactive cerium tracer in the presence of polyethyleneimine.
The effect of polymer loading and pH of the feed system are investigated.
Authors:T. Datta Samanta, S. Laskar, D. Nayak, and S. Lahiri
Binding ability of mercury, thallium, lead and bismuth with Erythrina variegata seed protein have been investigated using tracer packet technique. Due to the lack of standard methods, inter-comparisons
have been made among three different approaches, like trichloroacetic acid (TCA) precipitation, isoelectric precipitation
and dialysis of protein after incubation with the metals. Good agreement was observed for all the cases except that of lead.