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Adsorption of Zn(II) from Aqueous Solutions by Thiol-Functionalized MCM-48

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Abstract:

Thiol-functionalized MCM-48 (SH-MCM-48) was synthesized by co-condensation method, with co-templates of cetyltrimethylammonium bromide (CTAB) and nonionic poly (ethylene oxide)–poly (propylene oxide)–poly (ethylene oxide) triblock copolymer (Pluronic P123). The resulting material was characterized by XRD and FT-IR spectrum. The potential of SH-MCM-48 for adsorption Zn (II) from aqueous solution was examined. Batch adsorption studies were carried out to investigate the effect of experimental parameters including pH, metal ions concentration and adsorption time. The maximum adsorption capacities of Zn (II) onto SH-MCM-48 were 30.12, 34.01 and 38.02 mg g-1 at the temperature of 303, 313 and 323K, respectively. The adsorption kinetics data were found to follow the pseudo-second-order kinetic model, and adsorption isotherms were fitted well with Langmuir and Freundlich models. Moreover, the adsorption thermodynamic parameters (△G0, △H0 and △S0) were measured, and indicated that the adsorption was an exothermic and spontaneous process.

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Periodical:

Advanced Materials Research (Volume 413)

Pages:

148-153

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.413.148

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Online since:

December 2011

Authors:

Xue Na Hu, Ya Han, Jia Yan Li, Jun Yan Wu, Jian Rong Chen, Meng Jie Tang

Keywords:

Adsorption, Thiol-Functionalized MCM-48, Zn(II)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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