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Removing Pb2+ by Adsorption over Thiol-Functionalized Mesoporous Silica

  • PHYSICAL CHEMISTRY OF SURFACE PHENOMENA
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Abstract

A thiol-functionalized HMS mesoporous silica was synthesized with thiolsilane. FTIR characterization suggests that thiol group has been anchored on the surface of HMS. SH-HMS performs better than HMS in adsorption of lead ion from water. The adsorption ratio on SH-HMS monotonously increases with adsorption time, which is beyond 95.5% after 5 min of adsorption time and be close to the equilibrium state. It decreases with pH value while increases with adsorbent dosage. Furthermore, the increment of lead initial concentration leads to decrease the adsorption ratio while increase the adsorption quantity. Adsorption ratioof 100 % can be obtained under following conditions: pH 6, 30 min of adsorption time, 8 g L–1 of adsorbent dosage, and 40 mg L–1 of initial lead concentration. The relationship between the adsorptive quantity and equilibrium adsorption concentration is in good accordance with both of the Langmuir isotherm model and the Freundlich model.

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ACKNOWLEDGMENTS

This work was supported by the Natural Science Foundation of Education Department of Henan Province in China (12B530004).

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  1. School of Chemistry and Chemical Engineering of Xuchang University, 461000, Xuchang, China

    Xuefeng Li &  Like Zhang

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  1. Xuefeng Li
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Correspondence to Xuefeng Li.

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Xuefeng Li, Like Zhang Removing Pb2+ by Adsorption over Thiol-Functionalized Mesoporous Silica. Russ. J. Phys. Chem. 93, 1804–1808 (2019). https://doi.org/10.1134/S0036024419090310

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  • DOI: https://doi.org/10.1134/S0036024419090310

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