A kind of inorganic ion-exchanger for cesium removal

zirconium molybopyrophosphate（ZMPP） was synthesized from ZrOCl2

Na2MoO4 and K4P2O7.The effect of ZrOCl2 concentration on the structure and ion-exchange performance of ZMPP was investigated.The microstructure of ZMPP was analyzed by FT-IR

TGA

XRD

SEM

etc.FT-IR spectra indicated that there were structural water and pyrophosphate groups in ZMPP samples.TGA curves showed that the structural water was gradually lost between 110°C to 590°C.XRD curves displayed that ZMPP samples were amorphous.SEM photos manifested that ZMPP were irregular grains in micron scope

and the surface became smooth after ion-exchanged with Cs+.ZMPP exhibited excellent acidresistivity.Concentration of ZrOCl2 did not evidently affect the structure of ZMPP

however

results of adsorption experiment showed that ion-exchange capacity would increase with ZrOCl2 concentration increases.In neutral system

when initial Cs+ concentration was 13.24 mmol/L

its ion-exchange capacity was up to 1.329 mmol/g.