METHOD OF SORPTION WATER CLEANING FROM DISSOLVED URANIUM Russian patent published in 2018 - IPC C02F1/28 B82Y40/00 B01J20/30 C01G43/00 C02F101/20 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical technology to isolate uranium (VI) from aqueous media, as well as in the purification of radioactively contaminated natural, sewage and sea water. Method includes the use, as a sorbent, of macroporous materials based on iron oxide systems of a composite composition containing a nanoscale iron phase and having a macroporous structure. As a sorbent, a material obtained from a xerogel of iron hydroxide synthesized by sol-gel (template) synthesis is used, in the presence of a siloxane-acrylate emulsion solution with a solid content of 50 wt% polymer and an average particle size of 160 nm as a colloid template. After washing and drying, the material is calcined in air for 1 hour at temperatures of 600 to 900 °C, and then the resulting iron oxide is calcined in a current of carbon monoxide for 1 hour at 900°C at a heating rate of 10 °C/min. Resulting sorbent is introduced into the purified aqueous medium in concentrations of 1:100 by weight with a uranyl ion content in the solution of at least 10 g/l, at pH of 2.5 to 7–8, at room temperature, kept for 3–8 to 48 hours, after which it is filtered and the precipitate is recovered.

EFFECT: method provides an increase in the efficiency of cleaning aqueous solutions from uranium, and also due to the presence of a magnetic effect in the sorption material, the efficiency of separating the precipitate from the solution to be cleaned by magnetic separation is increased.

3 cl, 7 dwg