Sorption decontamination of nitric acid solutions from tributyl phosphate and hexachlorobutadiene

The possibility of using the polymeric sorbent Polysorb-1 for the decontamination of nitric acid solutions from organophosphorus compounds, including tributyl phosphate (TBP), and hexachlorobutadiene (HCBD) was studied. It has been shown that the purification of nitric acid solutions containing organophosphorus compounds, HCBD, U(VI), and Pu(IV) with the Polysorb-1 sorbent under dynamic conditions makes it possible to reduce the phosphorus content to ~2 mg/dm³ and less and the HCBD content to 0.05 mg/dm³ or less. In this case, the sorption of U(VI) and Pu(IV) on this sorbent does not occur. Schemes for the regeneration of the Polysorb-1 sorbent to remove TBP and HCBD by vacuum distillation and live steam stripping are considered. The optimal temperature of the process was chosen equal to 170°C.