Ion exchange properties of cesium ion sieve based on zirconium molybdopyrophosphate

摘要: Abstract Cesium ion sieve (Cs-IS) based on a novel exchanger, zirconium molybdopyrophosphate, was prepared via an impregnation–recrystallisation–leaching procedure. The physicochemical properties were determined using X-ray photoelectron spectra (XPS), simultaneous thermal analysis (DSC-TGA), nitrogen adsorption–desorption and scanning electron microscopy (SEM). synthesized material found to have cesium exchange capacity (CEC) up 1.38 mmol/g, good stability 1000 °C average mesopore size of 13.54 nm. surface characterizations revealed that distributed over the rough irregular particles. removal from acidic media in batch conditions evaluated focusing kinetic, isotherm selectivity. Ion equilibrium attained within 15 h best fitted into pseudo-second-order model. calculated empirical thermodynamic functions hinted onto Cs-IS could be simplified enthalpy-driven, physical adsorption process. effects initial pH ionic strength explored. selectivity for fairly desirable considering solution acidity presence substantial amount sodium ions.