甲基橙印迹磁性壳聚糖聚合物的制备及吸附特性

doi:10.3969/j.issn.1673-5854.2018.03.001

Abstract

Abstract: Magnetic chitosan(Fe₃O₄@CTS) microspheres were prepared through sol-gel method firstly. Then, a novel, magnetic molecularly imprinted polymers(MMIPs) were synthesized by aqueous solution polymerization with Fe₃O₄@CTS as support and functional monomer and methyl orange as template molecules. Characterizations of the obtained MMIPs were achieved by SEM, XRD, FT-IR and VSM. Batch adsorption experiments were performed to investigate the adsorption conditions, selectivity and reusability of the adsorption of MO on MIMPs. The results showed that the maximum adsorption capacity was 113.16 mg/g and equilibrium adsorption was achieved around 60 min observed at pH value 6.5 and temperature 25℃, and the MMIPs had specific adsorption capacity for MO compared with the non-imprinted magnetic particles(NIMPs). Adsorption process could be well described by Langmuir adsorption isotherms and the kinetic data could be fitted with pseudo-second-order equation. Furthermore, the selectivity coefficient of MO and other dyes onto MMIPs indicated an overall preference with the maximum selectivity coefficient(K) of 2.85. Moreover, MMIPs could be separated by external magnet, which could be reused for 5 times with a high adsorption efficiency overall 90% after desorption.

Key words: chitosan microspheres, magnetic molecularly imprinted polymers, methyl orange, specific adsorption

CLC Number:

TQ35

LI Man, CAI Zhaosheng, FANG Guigan, LIANG Long, ZHOU Jing. Preparation and Adsorption of Methyl Orange Imprinted Magnetic Chitosan Polymer[J]. bce, 2018, 52(3): 1-8.

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Preparation and Adsorption of Methyl Orange Imprinted Magnetic Chitosan Polymer

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