Abstract
A water-compatible magnetic triclosan (TCS) imprinted material (TCS-CTS-Fe0-MIPs) was synthesized for selective enrichment and detection of TCS in real complex water samples. The material was synthesized by using chitosan (CTS) as functional monomer, which has rich surface O- and N-containing functional groups. The TCS imprinted CTS was coated on Fe0 surface and then cross-linked with glutaraldehyde. Scanning electron microscopy suggested that the imprinted material was covered with a layer of imprinted film, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that the imprinted material had more functional groups (amino and hydroxyl groups) than that of non-imprinted material. The TCS imprinted and non-imprinted materials used in each adsorption experiments were 0.1 mg mL−1. The maximum adsorption capacity of the TCS imprinted material and non-TCS imprinted material were 20.86 and 15.11 mg g−1, respectively. The adsorption results showed that selectivity coefficient was 10.151, 1.353, and 8.271 in the presence of p-chlorophenol, 2,4,6-trichlorophenol, and bisphenol-A, respectively. The recoveries of river water and lake water samples were 92.8, 91.3, 92.4, and 81.4, 82.3, 82.1%, respectively, when the samples were spiked with 4, 6, and 8 μg L−1 of TCS with the imprinted material. The adsorption capacity of the TCS imprinted material and non-TCS imprinted material lost 5.2 and 6.2% after six times of recycling. The high selectivity and excellent adsorption capacity of the imprinted material can be attributed to the presence of sterically complementary imprinted sites and high surface, which would also made it more accessible to TCS than that of non-imprinted material. The present study would provide an environmental friendly and convenient method for the removal and the monitoring of TCS in environmental water samples.
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Acknowledgements
The research was financially supported by grants from National Nature Science Foundation of China(21677052), Major Science and Technology Program for the Industry-Academia-Research Collaborative Innovation(201604010043, 201605122301117), Guangdong Province Science and Technology Project(2016B090918104, 2013B090200016, 2015B020215007, 2015B020235009, 2016B020240005), Joint fund of Guangdong Province (U1401235), State Key Laboratory of Pulp and Paper Engineering(2016C03), and Zhanjiang of Guangdong Energy Co. (ZY-KJ-YX-2016X085F).
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Chen, Y., Lei, X., Dou, R. et al. Selective removal and preconcentration of triclosan using a water-compatible imprinted nano-magnetic chitosan particles. Environ Sci Pollut Res 24, 18640–18650 (2017). https://doi.org/10.1007/s11356-017-9467-6
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DOI: https://doi.org/10.1007/s11356-017-9467-6