Preparation and evaluation of a novel surface-imprinted polymer for selective adsorption of dibenzothiophene
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We have prepared a novel surface molecular imprinted polymer (S-MIP) using dibenzothiophene (DBT) as the template molecule, 4-vinylpyridine as the functional monomer, and potassium hexatitanate whisker as the carrier. The S-MIP was characterized by Fourier transform infrared spectroscopy and and scanning electron microscopy. The kinetics and isotherms for the adsorption of DBT on the S-MIP followed pseudo-second-order and Freundlich models, respectively. Thermodynamic parameters were determined. The overall adsorption process was endothermic and spontaneous. Selectivity studies showed that the S-MIP selectively adsorbs DBT over its structural analogs and can be regenerated. Its adsorption capacity was still at 84.8% at the sixth cycle.
KeywordsSurface molecular imprinted polymer Dibenzothiophene Potassium hexatitanate whisker Adsorption
This work was supported by the National Natural Science Fund (No. 20947003), China Postdoctoral Science Foundation (No. 20090461066), Jiangsu Planned Projects for Postdoctoral Research Funds of China (No. 0902056 C) and Senior Talent Foundation of Jiangsu University (No. 09JDG048).
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