Selective Removal of the Genotoxic Compound 2-Aminopyridine in Water using Molecularly Imprinted Polymers Based on Magnetic Chitosan and ?-Cyclodextrin

Wei Zhang, Zhiliang Zhu, Hua Zhang and Yanling Qiu
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Wei Zhang: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Zhiliang Zhu: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Hua Zhang: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Yanling Qiu: Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China

IJERPH, 2017, vol. 14, issue 9, 1-22

Abstract: To develop efficient materials with enhanced adsorption and selectivity for genotoxic 2-aminopyridine in water, based on magnetic chitosan (CTs) and ?-cyclodextrin (?-CD), the magnetic molecularly imprinted polymers (MMIPs) of Fe 3 O 4 -CTs@MIP and Fe 3 O 4 -MAH-?-CD@MIP were synthesized by a molecular imprinting technique using 2-aminopyridine as a template. The selective adsorption experiments for 2-aminopyridine were performed by four analogues including pyridine, aniline, 2-amino-5-chloropyridine and phenylenediamine. Results showed the target 2-aminopyridine could be selectively adsorbed and quickly separated by the synthesized MMIPs in the presence of the above structural analogues. The coexisting ions including Na + , K + , Mg 2+ , Ca 2+ , Cl ? and SO 4 2? showed little effect on the adsorption of 2-aminopyridine. The maximum adsorption capacity of 2-aminopyridine on Fe 3 O 4 -CTs@MIP and Fe 3 O 4 -MAH-?-CD@MIP was 39.2 mg·g ?1 and 46.5 mg·g ?1 , respectively, which is much higher than values in previous reports. The comparison result with commercial activated carbon showed the obtained MMIPs had higher adsorption ability and selectivity for 2-aminopyridine. In addition, the synthesized MMIPs exhibited excellent performance of regeneration, which was used at least five times with little adsorption capacity loss. Therefore, the synthesized MMIPs are potential effective materials in applications for selective removal and analysis of the genotoxic compound aminopyridine from environmental water.

Keywords: aminopyridine; magnetic molecularly imprinted polymer; selective adsorption; chitosan; ?-cyclodextrin; genotoxic compounds (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
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