ASSESMENT OF THE EFFICIECNY OF EXTRACTION OF NICKEL IONS FROM AQUEOUS MEDIUM BY NEW MAGNETIC SORBENTS ZEOLITE/Co0,5Zn0,5Fe2O4

The samples of new magnetic composite materials based on natural zeolite (Zt) with varied content (5-30%) of nanoparticles of cobalt-zinc ferrite Co0,5Zn0,5Fe2O4 (F) were studied in regard their sorption ability for nickel ions extraction from aqueous solution of 29,5 mg/dm3 concentration of Ni2+. It was established that the time of sorption equilibrium in the systems sorbent-aqueous solution of NiSO4 reach ~20 min for each investigated sample. The value of sorption capacity of the sorbents increased in the order Zt<Zt-5F<Zt-10F<Zt-20F<Zt-30F<F. It was shown that by addition of ferrite phase into composite the degree of nickel ions extraction from aqueous medium rose in 1,5-1,7 times as compared to zeolite, reaching ~70-80%. The obtained composite sorbents are capable of fast and effective magnetic separation from aqueous phase for further regeneration.