Abstract
A new Cs+ adsorbent, Fe3O4-chitosan particles combined with ammonium molybdophosphate (Fe3O4–CTS–AMP composite) were synthesized using a facile method through coordination between CTS and AMP. The surface morphology and chemical composition characterization indicated that Fe3O4–CTS particles and AMP particles were bonded tightly and the composite behaved superparamagnetically. Cs+ adsorption properties of Fe3O4–CTS–AMP composites were studied. The adsorption data fitted well with pseudo-second-order kinetic model and Langmuir–Freundlich adsorption isotherms model. The adsorption equilibrium can be reached fast at 5 min. The maximum adsorption capacity was calculated as 177.8 mg g−1. The composite also showed high selectivity for Cs+ in coexistence with high concentration of competing cations. The adsorption mechanism of Cs+ for the composite may mainly be the exchange of Cs+ with NH4+. Therefore, the newly developed adsorbent is a kind of potential efficient composite for Cs+ removal from wastewater.
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The authors acknowledge financial supported by Chinese Ministry of Science and Technology (No. 2014FY211000).
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The authors received support from Chinese Ministry of Science and Technology (No. 2014FY211000) for the submitted work.
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Conceptualization: YJ, TX; methodology: TX, LY; formal analysis and investigation: TX, HW; writing original draft preparation: TX; writing review and editing: YJ; resources: YJ; supervision: YJ. All authors read and approved the final manuscript.
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Xia, T., Wu, H., Yin, L. et al. Selective removal of cesium by ammonium molybdophosphate-magnetic Fe3O4-chitosan composites. Journal of Materials Research 36, 2926–2935 (2021). https://doi.org/10.1557/s43578-021-00279-2
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DOI: https://doi.org/10.1557/s43578-021-00279-2