URANIUM SORPTION BY ORGANOZEOLITES AND FERROMAGNETIC ORGANOZEOLITES FROM WASTE WATER OF SPECIAL LAUNDRY

摘要

The selectivities of the new sorbents - organozeolites based on natural zeolite (sorbent 1) and magnetized natural zeolite (sorbent 2), modified by polyhexamethyleneguanidine chloride (PGMG), to carbonate complex of uranium from the CO_3~(2-)-bearing waste water of special laundry were studied. The equilibrium and kinetic characteristics of the carbonate uranium complex-ions sorption by organozeolites (sorbent 1 and 2) were determined. The high distribution coefficients for the carbonate uranium complex-ions and film-diffusion kinetic mechanism of sorption for sorbent 1 and sorbent 2 were established. The mathematical model describing this process in dynamic conditions was chosen based on obtained equilibrium and kinetic characteristics of sorbents 1 and 2. The calculation of the breakthrough times was carried out for various solution flow rates, degree of waste water decontamination, and other parameters.