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Interfacial synthesis ZIF-8@HPAN membrane for highly efficient humic acid removal

Yingzi Lin, Yi Liu, Ruijun Ren, Feng Xiao, and Dongsheng Wang

School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun, China

 

E-mail: linyingzi@jlju.edu.cn

Received: 31 October 2021  Accepted: 14 February 2022

Abstract:

In this study, a ZIF-8 thin layer deposited on the surface of a hydrolyzed polyacrylonitrile (HPAN) membrane was used for highly efficient humic acid removal. The thin ZIF-8 layer was synthesized by using a two-step interfacial synthesis method, based on liquid–liquid interfacial coordination polymerization. The formation of a continuous ZIF-8 layers was confirmed by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and atomic force microscopy. The effects of the synthesis conditions including reaction time, precursor concentration, and other operating conditions on the ZIF-8 composite membrane performance were studied using humic acid solution as organic waste. The results showed when the reaction time was extended, or when the precursor concentration was increased, the ZIF-8 layer deposited on the membrane surface became denser. Compared with the unmodified HPAN substrate, the composite membrane deposited with the ZIF-8 layer showed better processing ability for organic matters due to the strong electrostatic interaction of organic matter with the ZIF-8@HPAN membrane and the ZIF-8 particles unique structural characteristics, which shows a great application prospect for humic acid treatment compared with other membrane technologies.

Keywords: Interfacial synthesis; ZIF-8; Synthesis conditions; Humic acid; Membrane performance

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02138-8

 

Chemical Papers 76 (7) 4405–4418 (2022)

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