Selectivity of cesium from fission radionuclides using resorcinol-formaldehyde and zirconyl-molybdopyrophosphate as ion-exchangers.
Two ion-exchangers, the first is organic in nature and the other is inorganic named as resorcinol-formaldehyde (R-F) and zirconyl-molybdopyrophosphate (ZMPP) were synthesized and applied to decontaminate some fission radionuclides from radioactive waste streams. The distribution coefficients of the studied radionuclides for the two ion-exchanges at varying pH conditions are evaluated and the data showed that the selectivity sequence of resorcinol-formaldehyde for the studied cations is Cs(+)>Co(2+)>Eu(3+)>Zn(2+) which is the same sequence of zirconyl-molybdopyrophosphate while as the X-ray diffraction characterization showed that resorcinol-formaldehyde resin is an amorphous material but zirconyl-molybdopyrophosphate is a semicrystalline one and both of resorcinol-formaldehyde and zirconyl-molybdopyrophosphate are considered as promising materials specially for the decontamination of cesium from radioactive waste solutions.
Shady
S A
SA
Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt. dr.sshady@yahoo.com
D002588:Cesium Radioisotopes / Q000302:isolation & purification*; D003666:Decontamination / Q000379:methods*; D005557:Formaldehyde / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins / Q000737:chemistry*; D011850:Radioactive Waste / Q000517:prevention & control*; D011868:Radioisotopes; D012118:Resorcinols / Q000737:chemistry*
D002588:Cesium Radioisotopes; D007475:Ion Exchange Resins; D011850:Radioactive Waste; D011868:Radioisotopes; D012118:Resorcinols; C477688:resorcinol-formaldehyde resin; D005557:Formaldehyde