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Reference type: Journal
Authors: Xie XW, Ma XG, Guo LH, Fan YM, Zeng GL, Zhang MY, Li J
Article Title: Novel magnetic multi-templates molecularly imprinted polymer for selective and rapid removal and detection of alkylphenols in water.
Publication date: 2019
Journal: Chemical Engineering Journal
Volume: 357
Page numbers: 56-65.
DOI: 10.1016/j.cej.2018.09.080
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1385894718317911

Abstract: A novel multi-templates molecularly imprinted polymer (MIP) was prepared on the surface of mesoporous silica coated magnetic graphene oxide (MGO@mSiO2), and applied for the rapid and selective detection of alkylphenol compounds including bisphenol A (BPA), 4-tert-octylphenol (4-tert-OP) and 4-nonylphenol (4-NP) in water. The synthesized composite was characterized by Fourier transform infrared spectrometer, vibrating sample magnetometer, transmission electron microscopy and Brunauer-Emett-Teller surface area analyzer. The MIP showed high adsorption capacity, good selectivity and fast kinetic for these alkylphenols. The maximum adsorption capacities of the MIP for BPA, 4-tert-OP and 4-NP were 16.81, 35.97 and 61.73 mg g-1, respectively, which were significantly higher than those of the non-molecularly imprinted polymer (NIP) due to the imprinting effect. The adsorption of alkylphenols reached equilibrium within 30 min, and followed pseudo-second-order kinetic model and Langmuir model well. The MIP exhibited good sorption selectivity towards BPA, 4-tert-OP and 4-NP, and could be reused 5 times. Furthermore, a new method for ultrasensitive determination of BPA, 4-tert-OP and 4-NP in water by high performance liquid chromatography was developed, using MIP-based magnetic solid-phase extraction coupled with dispersive liquid-liquid microextraction. Under the optimum conditions, the limits of detection (LODs) for BPA, 4-tert-OP and 4-NP were 0.013, 0.010 and 0.010 μg L-1, respectively. The proposed method was used to the detection of BPA, 4-tert-OP and 4-NP in real water samples, with spiked recoveries of 81.5-104.1% and relative standard deviations (RSDs) of 1.0-7.6%, indicating the multi-templates MIP could be a promising adsorbent for separation and analysis of alkylphenols
Template and target information: multi-template, alkylphenols, bisphenol A, BPA, 4-tert-octylphenol, 4-tert-OP, 4-nonylphenol, 4-NP
Author keywords: molecularly imprinted polymer, alkylphenols, Multi-templates, removal, detection

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