Abstract
In this work, mesoporous SBA-15 with different morphologies (platelets, rods, and fibers) were facilely fabricated and employed as a support for immobilization of Ammonium 12-Molybdophosphate (AMP, (NH4)3[P(Mo12O40)]). The obtained AMP/SBA-15 was then developed as a composite adsorbent to remove cesium (Cs) from an aqueous solution. The Cs+ adsorption onto the composite adsorbent was investigated as a function of AMP loading, contact time, pH, initial Cs+ concentration, and interfering cations. Our results show that the morphology of SBA-15 has a small effect on kinetic of the adsorption process and adsorption capacity through influence on the availability of active sites after AMP loading. The 50%AMP/P-SBA-15 with short pore showed the shortest equilibrium time and the highest adsorption capacity therefore delivering the best performance among the three morphologies. Selective adsorption results demonstrated that Na+, K+, Ca2+, and Mg2+ in solution do not interfere with Cs+ during the adsorption process on AMP/SBA-15 indicating high selectivity for Cs+. Hence, AMP/SBA-15 with platelet-shape morphology and short pore is an efficient adsorbent to remove Cs+ from an aqueous solution.
Highlights
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AMP/SBA-15 with various morphologies (fibers, rods, and platelets) was fabricated.
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Morphology has a small effect on adsorption kinetic and capacity.
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50%AMP/P-SBA-15 exhibited the highest adsorption capacity and fastest kinetics.
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Na+, K+, Ca2+, and Mg2+ do not interfere with Cs+ during the adsorption process.
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The AMP/SBA-15 could be used as an effective adsorbent for Cs+ removal.
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Acknowledgements
This work was supported by the China Postdoctoral Science Foundation Funded Project (No. 2017M610613), the Scientific Research Fund of Sichuan Provincial Education (No. 17ZA0411), the Longshan Academic Talent Research Supporting Program of SWUST (18lzx546), the Doctor Research Foundation of Southwest University of Science and Technology (No. 13zx7136), the National Training Program of Innovation and Entrepreneurship for Undergraduates (201810619083), the Targeted Aid for Undergraduate Innovation Fund Project (No. jz18-018) and the Innovation Fund of Southwest University of Science and Technology (No. cx18-026).
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Dan, H., Xian, Q., Chen, L. et al. Fabrication of AMP/SBA-15 with various morphologies for cesium removal from aqueous solution. J Sol-Gel Sci Technol 91, 165–177 (2019). https://doi.org/10.1007/s10971-018-4842-4
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DOI: https://doi.org/10.1007/s10971-018-4842-4