Highly ordered molecularly imprinted mesoporous silica for selective removal of bisphenol A from wastewater. Issue 5 (27th December 2019)

• Record Type: Journal Article
• Authors: Wu, Jinyi; Tan, Lei; Li, Yuling; Wu, Xiaotong; Liang, Yong
• Is Part Of: Journal of separation science. Volume 43:Issue 5(2020)
• Page Start: 987
• Page End: 995
• Publication Date: 2019-12-27
• Subjects: adsorbents -- bisphenol A -- mesoporous materials -- molecularly imprinted polymers -- wastewater treatment; Separation (Technology) -- Periodicals; Chromatographic analysis -- Periodicals; 543.089
• DOI: 10.1002/jssc.201900957
• Languages: English
• ISSNs: 1615-9306

Abstract

Abstract: Selective removal of bisphenol A from wastewater is quite challenging primarily because of its low concentration and matrix complexity. To this end, according to the molecular structure of bisphenol A, we designed a functional monomer for the preparation of molecularly imprinted mesoporous silica using click chemistry reaction. The resultant bisphenol A imprinted mesoporous silica was characterized by transmission electron microscopy, small angle X‐ray diffraction, and N2 adsorption–desorption experiments. The results indicated that the bisphenol A imprinted mesoporous silica possessed a highly ordered periodic hexagonal mesostructure with the Brunauer–Emmett–Teller surface area of 944.28 m 2 /g. The bisphenol A imprinted mesoporous silica showed fast adsorption kinetics and the saturated adsorption capacity reached up to 88.6 mg/g at pH 6.5, and with relative selectivity factors ranged from 1.06 to 3.20. The adsorption efficiency of the bisphenol A imprinted mesoporous silica was above 97.96% after five extraction/elution cycles. The bisphenol A imprinted mesoporous silica was further applied to the selective removal of bisphenol A from real wastewater samples and showed great promise in practical applications.