ZIF-67/SA@PVDF Ultrafiltration Membrane with Simultaneous Adsorption and Catalytic Oxidation for Dyes

Kaixuan Zhu, Shabin Mohammed, Hai Tang (), Zongli Xie, Sisheng Fang and Shasha Liu ()
Additional contact information
Kaixuan Zhu: School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China
Shabin Mohammed: NYUAD Water Research Center, Department of Engineering, New York University Abu Dhabi, Abu Dhabi P.O. Box 129188, United Arab Emirates
Hai Tang: School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China
Zongli Xie: CSIRO Manufacturing, Private Bag 10, Clayton South, VIC 3169, Australia
Sisheng Fang: School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China
Shasha Liu: School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China

Sustainability, 2023, vol. 15, issue 4, 1-16

Abstract: Due to their stable chemical properties and complex structures, dyes are difficult to be removed from water. Herein, a ZIF-67/SA@PVDF (ZSA3@PVDF) mixed matrix membrane has been fabricated by incorporating silicon aerogel (SA) and zeolitic imidazolate framework material 67 (ZIF-67) nanoparticles in a polyvinylidene fluoride (PVDF) membrane for the removal and degradation of dyes from water. The influence of SA and ZIF-67 on the morphology and structure of the membrane was confirmed using scanning electron microscope (SEM) and atomic force microscope (AFM). In ZSA3@PVDF membrane, both SA and ZIF-67 are highly porous nanomaterials that possess good adsorption capacity, as confirmed by the Brunauer–Emmett–Teller (BET) result. In addition, the cobalt (Co) element of ZIF-67 can catalyze peroxymonosulfate (PMS) to generate strong oxidizing sulfate radicals (SO 4 2− ), contributing to improving regeneration capacity of the ZIF-67/SA@PVDF membrane. The water flux of ZSA3@PVDF membrane is 427.6 L m −2 h −1 bar −1 , and the Methylene blue (MB) removal rate is higher than 99% when filtrating 100 mL MB solution (5 mg/L). The regeneration test result shows that the removal rate of the ZSA3@PVDF membrane is still above 98% after five cycles of adsorption of MB. The self-cleaning experiment shows that the adsorption of SA in the ZSA3@PVDF membrane promotes the catalytic performance of the membrane, showing a better self-cleaning ability. The ZSA3@PVDF membrane provides a new strategy for the removal of dyes in the advanced purification of dye wastewater.

Keywords: dye; silicon aerogel; metal-organic frameworks; adsorption; mixed matrix membrane (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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