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Int. J. Mol. Sci. 2013, 14(3), 5952-5965; doi:10.3390/ijms14035952
Article

Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution

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Received: 13 November 2012; in revised form: 12 January 2013 / Accepted: 13 February 2013 / Published: 14 March 2013
(This article belongs to the Section Molecular Recognition)
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Abstract: A molecularly imprinted silica gel sorbent for selective removal of 2-Hydroxybenzoic acid (2-HA) was prepared by a surface imprinting technique with a sol-gel process. The 2-HA molecularly imprinted silica gel (2-HA-MISG) sorbent was evaluated by various parameters, including the influence of pH, static, kinetic adsorption and selectivity experiments. The optimum adsorption capacity to the 2-HA appeared to be around pH 2 by the polymer. Morevoer, the imprinted sorbent displayed fast uptake kinetics, obtained within 20 min. The adsorption capacity of the 2-HA-MISG (76.2 mg g−1) was higher than that of the non-imprinted silica gel (NISG) (42.58 mg g−1). This indicates that the 2-HA-MISG offers a higher affinity for 2-HA than the NISG. The polymer displays good selectivity and exhibits good reusability. Experimental results show the potential of molecularly imprinted silica sorbent for selective removal of 2-HA.
Keywords: molecularly imprinted silica gel; 2-Hydroxybenzoic acid; functionalized silica gel molecularly imprinted silica gel; 2-Hydroxybenzoic acid; functionalized silica gel
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Raof, S.F.A.; Mohamad, S.; Abas, M.R. Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution. Int. J. Mol. Sci. 2013, 14, 5952-5965.

AMA Style

Raof SFA, Mohamad S, Abas MR. Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution. International Journal of Molecular Sciences. 2013; 14(3):5952-5965.

Chicago/Turabian Style

Raof, Siti F.A.; Mohamad, Sharifah; Abas, Mhd R. 2013. "Synthesis and Evaluation of Molecularly Imprinted Silica Gel for 2-Hydroxybenzoic Acid in Aqueous Solution." Int. J. Mol. Sci. 14, no. 3: 5952-5965.



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