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A new ecomaterials cesium ion-sieve (Cs-IS), which has high selectivity to cesium and excellent acid resistance, is prepared with zirconyl molybdopyrophosphate as its matrix by specific chemical sieve-making means. Cs-IS has large exchange capacity (1. 83 mmol·g-1) and high distribution coefficient (4.09×104 mL·L-1) in the medium of 3 mol·L-1HNO3. In the static exchange with strongly acidic high-level radioactive liquid waste (HLLW) (3 mol·L-1 HNO3), Cs-IS exhibits high exchange rate for cesium (above 96. 53% ) and large separation factor (greater than 958.41) . These indicate the possible use of Cs-IS in cesium-137 selective removal and recovery from highly saline acidic HLLW system.
A new ecomaterials cesium ion-sieve (Cs-IS), which has high selectivity to cesium and excellent acid resistance, is prepared with zirconyl molybdopyrophosphate as its matrix by specific chemical sieve-making means. 83 mmol · g-1) and high distribution coefficient (4.09 × 104 mL·L-1) in the medium of 3 mol·L-1HNO3. In the static exchange with strongly acidic high-level radioactive liquid waste (HLLW) Cs-IS exhibits high exchange rate for cesium (above 96.53%) and large separation factor (greater than 958.41). These indicate the possible use of Cs-IS in cesium-137 selective removal and recovery from highly saline acidic HLLW system.