Piezoelectric-channels in MoS2-embedded polyvinylidene fluoride membrane to activate peroxymonosulfate in membrane filtration for wastewater reuse

Enya Wu; Yang Yu; Jiayue Hu; Gang Ren; Mingshan Zhu

doi:10.1016/j.jhazmat.2023.131885

Piezoelectric-channels in MoS₂-embedded polyvinylidene fluoride membrane to activate peroxymonosulfate in membrane filtration for wastewater reuse

J Hazard Mater. 2023 Sep 15:458:131885. doi: 10.1016/j.jhazmat.2023.131885. Epub 2023 Jun 17.

Authors

Enya Wu¹, Yang Yu², Jiayue Hu¹, Gang Ren¹, Mingshan Zhu³

Affiliations

¹ Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, PR China.
² Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, PR China. Electronic address: yuyang@jnu.edu.cn.
³ Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, PR China. Electronic address: zhumingshan@jnu.edu.cn.

PMID: 37348370
DOI: 10.1016/j.jhazmat.2023.131885

Abstract

The conjugation of membrane filtration (MF) with advanced oxidation process (AOPs) is being considered as an alternative advanced treatment process for the potable reuse of wastewater. Beyond conventional MF/AOPs conjugation, a new downstream MF process with piezoelectric-channels induced piezo-activated peroxymonosulfate (PMS) is herein constructed to deal with antiepileptic carbamazepine (CBZ) pollutants through polyvinylidene fluoride (PVDF) membrane (PVDF-M10). Through a MF process, ca. 93.8% CBZ pollutants can be removed under an ultrasonic-assisted piezo-activation PMS, whereas only 18.3% and 60.2% CBZ can be removed by using pure PVDF membrane under the same condition and PVDF-M10 membrane without ultrasonic-assisted piezo-activation. Even after 9-cycles, CBZ removal efficiency was maintained at 56.4% under this MF process. These superior performances are attributed to the piezoelectric exfoliated-MoS₂ nanosheets (E-MoS₂) embedded PVDF nanofibers in PVDF-M10 membrane, which lead to rich piezoelectric-channels in the membrane. These piezoelectric-channels not only produced more charges to activate PMS to boost the yield of reactive oxide species (ROS) but also provided an ideal platform for the rapid reaction between CBZ and ROS during MF process. This investigation develops a new MF technique to conjugate piezo-activation of PMS-AOPs for the efficient removal of emerging pollutants for the potable reuse of wastewater.

Keywords: Catalytic membrane; Membrane filtration; Peroxymonosulfate; Piezoelectric-channels; Wastewater reuse.