Efficient selective adsorption of uranium using a novel eco-friendly chitosan-grafted adenosine 5-monophosphate foam

In the present study, a novel eco-friendly foam (CS-AMP) was successfully prepared by grafting adenosine 5'-monophosphate (AMP) with high biocompatibility onto environment-friendly monomer chitosan (CS). The CS AMP foam was used to absorb uranium and exhibited an efficient selective adsorption of uranium from aqueous solution and natural seawater. Due to the phosphate group of AMP, the CS-AMP foam shows an excellent adsorption capacity of 311 mg/g (pH 5.0 and 308 K) for uranium, which is much higher than that of CS-PTA foam without modification by AMP. The adsorption process is fitted well with Sips isothermal and pseudo second-order kinetic models. As a highly selective uranium adsorbent, it is expected to be applied to extract uranium from wastewater and seawater.