Abstract
The composite of Fe3O4 and graphene oxide (denoted as Fe3O4/GO) with excellent adsorption capacity of Cs(I) and Sr(II) was prepared by chemical coprecipitation method. The characterization results Fe3O4/GO confirmed the successful preparation of Fe3O4/GO. Fe3O4/GO was applied as adsorbent for the separation of Cs(I) and Sr(II) from aqueous solution. At pH 5.0 and 293 K, the maximum adsorption capacities of Cs(I) and Sr(II) on Fe3O4/GO can achieve to 15.8 and 38.4 mg/g, respectively. Adsorptions of Cs(I) and Sr(II) on Fe3O4/GO surface were an endothermic and spontaneous process, and were enhanced at high pH and low ionic strength. Fe3O4/GO can be separated from aqueous solution by a simple magnetic process. The results of this work highlight the application of Fe3O4/GO as an adsorbent for the separation of Cs(I) and Sr(II) from radionuclide waste water.
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