The Study of Cooperation Solidification of Cs based on ZSM-5 Zeolite

In this work, using modified zeolite molecular sieve as a sorbent carrier, adjusting the content of cesium, adding Ca, Mg, Zr or Ba, different samples of solidification were prepared by soakage- absorption-calcination methods. The crystal characteristics of the samples were tested by XRD, the results showed that the higher the calcination temperature or the greater capacity of the Cs packages, the structure of ZSM-5 zeolite molecular sieve collapsed and pollucite emerged more easily. Furthermore, samples with the addition of Ba could accelerate the formation of pollucite. MCC-1 method was used to test the chemical durability of the solidification samples, the results show that when the content of Cs is lower than 30%, the leaching rate of Cs is at the level of 10-6 cm
• d-1,but when the content of Cs reached up to 35%, the leaching rate of Cs increased to 10-4 cm
• d-1. After doped Ba, the Cs leaching rate of 3Ba32Cs-850 is much lower than the Cs leaching rate of 35Cs-850, the results indicated that the solidification of doped Ba could improve the chemical durability of pollucite.