Comparison of Adsorption Capacity and Removal Efficiency of Strontium by Six Typical Adsorption Materials

The rapid development and application of nuclear technology have been accompanied by the production large amounts radioactive wastes, which Sr is a typical nuclide. In this study, six materials with strong adsorption properties, namely activated carbon, kaolin, montmorillonite, bentonite, zeolite, attapulgite, were selected. Their mechanisms investigated analyzing their isotherms, kinetics, micromorphologies, element contents, specific surface areas, crystal structures, functional groups. results showed that efficiency adsorbents can be ranked as among maximum capacity zeolite was 4.07 mg/g. Based on kinetic thermodynamic fitting results, zeolites, bentonite attapulgite consistent Langmuir model, pseudo-first-order pseudo-second-order process (II) carbon kaolinite Freundlich model corresponds to non-uniform adsorption. main are physical adsorption, ion exchange complexation. summary, especially highly effective for treatment wastewater containing strontium great value in wastes.