Magnetic porous carbon nanopolyhedron modified rGO composites as recyclable sorbent for effective removal of bisphenol A from water. Issue 5 (October 2021)

• Record Type: Journal Article
• Authors: Wang, Yachao; Chen, Dezhi; Yu, Yawen; Ding, Yuan; Cao, Xiukun; Fu, Maosheng; Zeng, Guisheng
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 5(2021)
• Publication Date: 2021-10
• Subjects: Adsorption -- Recyclable adsorbent -- Metal-organic frameworks -- Graphene oxide -- Endocrine disruptors; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.105911
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: The effective removal of endocrine disruptors from water is important for human health. Herein, magnetic sorbents, composed of ZiF-67-derived carbon polyhedrons containing Co nanocrystals (Co-C) modified reduced graphene oxide (rGO) nanosheets (Co-C/rGO), were synthesized. The optimized Co-C/rGO-2 exhibited a high adsorption capacity of 175.1 mg g −1 for removal of bisphenol A (BPA) from water because of the optimized porous structure including micropores, mesopores and macropores as well as high surface area of 284.4 m 2 g −1 . In addition, the adsorption equilibrium of BPA was almost reached within 3 h and showed almost stable at pH 2–7. Existence of humic acid, Ca 2+, K +, Na + had little effect, while the Al 3+ showed negative on the adsorption of BPA. Furthermore, the magnetic Co-C/rGO-2 can be easily recovered and showed high reuse performance remaining 83.7% of the initial adsorption capacity after the 4th recycling. The fixed-bed experiment indicated that the removal efficiency of BPA (10 μg L –1 ) from water can reach almost 100% at bed volume lower than 4000. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results revealed that the adsorption of BPA was mainly dominated by the π-π interaction. Graphical Abstract: ga1 Highlights: Magnetic sorbents of Co-C/rGO composites were prepared. Co-C/rGO showed optimized hierarchical porous structure and high surface area. A high adsorption capacity of 175.1 mg g −1 for removal of bisphenol A. The adsorption mechanism of π-π interaction was clarified.