The extraction of rubidium and cesium from brine resources is of great significance to the development of high-tech industry in China.However,the complex composition of the brine makes it difficult to separate rubidium and cesium from high concentrations of impurity ions.Prussian blue(FeHCF)and its analogs have excellent rubidium and cesium selectivity,so they become the mainstream materials for adsorbing rubidium and cesium.The adsorption properties of Prussian blue(FeHCF)and four kinds of Prussian blue analogs for low concentration rubidium and cesium in high-salt brine were comparatively studied.FeHCF is selected for subsequent experiments because of its excellent adsorption performance and low reagent price.Subsequently,the effects of various factors on the adsorption behavior of FeHCF were investigated.Under optimal conditions,the adsorption efficiencies of rubidium and cesium are 94.4%and 99.4%,respectively,and the saturated adsorption capacities are 517.3 mg/L and 2.8 mg/L,respectively.Finally,the physicochemical properties of FeHCF before and after adsorption were analyzed in detail,which verifies the successful adsorption of rubidium.
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