Preparation of Composite Material of Na-P1-Type Zeolite and Magnetite for Cs Decontamination

Summary The reaction time and the concentration of NaOH solution were studied for the preparation of Na-P1 type zeolite using fly-ach. Addition of NaAlO2 is effective for the improvement of cation exchange capacity (CEC) value. A new composite material consisting of the Na-P1 type zeolite and magnetite was synthesized from the waste fly-ash of thermal power stations and iron chlorides for the decontamination of radioactive 134 Cs and 137 Cs. The magnetic collection was possible using this composite material after Cs + ion adsorption. The existence of nanosized magnetites in the polycrystalline zeolite (several micrometers) was confirmed by TEM observations. Decontamination test of the radioactive Cs + ion using the magnetic Na-P1 type zeolite and the soil was succeeded.