Efficient removal of norfloxacin in water using magnetic molecularly imprinted polymer

Lei Fang; Yunxia Miao; Dong Wei; Yan Zhang; Yongchao Zhou

doi:10.1016/j.chemosphere.2020.128032

Efficient removal of norfloxacin in water using magnetic molecularly imprinted polymer

Chemosphere. 2021 Jan:262:128032. doi: 10.1016/j.chemosphere.2020.128032. Epub 2020 Aug 22.

Authors

Lei Fang¹, Yunxia Miao², Dong Wei³, Yan Zhang⁴, Yongchao Zhou⁵

Affiliations

¹ College of Civil Engineering and Architecture, Zhejiang University, Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Hangzhou, 310058, China. Electronic address: fanglei1999@zju.edu.cn.
² College of Civil Engineering and Architecture, Zhejiang University, Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Hangzhou, 310058, China. Electronic address: 21812065@zju.edu.cn.
³ College of Civil Engineering and Architecture, Zhejiang University, Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Hangzhou, 310058, China. Electronic address: 1274356122@qq.com.
⁴ College of Civil Engineering and Architecture, Zhejiang University, Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Hangzhou, 310058, China. Electronic address: zhangyan@zju.edu.cn.
⁵ College of Civil Engineering and Architecture, Zhejiang University, Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Hangzhou, 310058, China. Electronic address: zhoutang@zju.edu.cn.

PMID: 33182153
DOI: 10.1016/j.chemosphere.2020.128032

Abstract

Effective and practical materials are important for the pollution control in the environment. A novel magnetic molecularly imprinted polymer (CoFe₂O₄@TiO₂-MMIP) was prepared based on the surface molecular imprinting technology combined with photocatalytic degradation and magnetic separation. The adsorption rate constant and maximum adsorption capacity of CoFe₂O₄@TiO₂-MMIP are 0.21 g mg^-1 min^-1 and 14.26 mg g^-1, respectively. The effects of experimental factors on the adsorption properties of the magnetic molecularly imprinted polymer were investigated. CoFe₂O₄@TiO₂-MMIP had selective adsorption ability towards fluoroquinolones. The adsorption efficiency was closely related to the molecular structure, molecular weight, polarity and functional groups of the target contaminant and the removal efficiency of norfloxacin was affected by another substance obviously in binary adsorption system. The adsorption-photocatalytic recycling experiment verified that CoFe₂O₄@TiO₂-MMIP could simultaneously complete the degradation of pollutants and in-situ regeneration, indicating good reusability. This material with selective adsorption and photocatalytic regeneration would have substantial attraction for application in the removal of fluoroquinolones.

Keywords: Magnetic recycling; Molecular imprinting technology; Norfloxacin; Photocatalytic regeneration; Selective adsorption.

MeSH terms

Adsorption
Catalysis
Magnetic Fields*
Models, Theoretical
Molecular Imprinting*
Norfloxacin / analysis*
Photochemistry
Polymers / chemistry*
Surface Properties
Ultraviolet Rays
Water Pollutants, Chemical / analysis*
Water Purification / methods*

Substances

Polymers
Water Pollutants, Chemical
Norfloxacin