4.7 Article

Construction of visible light responsive ZnO/N-g-C3N4 composite membranes for antibiotics degradation

Journal

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 17, Issue -, Pages 1696-1706

Publisher

ELSEVIER
DOI: 10.1016/j.jmrt.2022.01.140

Keywords

PR China; g-C 3 N 4; ZnO; Photocatalytic membrane; Antibiotics degradation

Funding

  1. outstanding young and middle-aged science and technology innovation team in Hubei Province [T2020012]
  2. Major Technology Innovation of Hubei Province [2019ABA113]
  3. National youth talent support program in food industry of China
  4. Open Project of Engineering Research Center of Phos-phorus Resources Development and Utilization of Ministry of Education [LKF202009]

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Photocatalytic membranes are effective and environmentally friendly for the degradation of antibiotics in pharmaceutical and aquaculture wastewater. In this study, a novel photocatalytic membrane was prepared and its efficient degradation performance for antibiotics was confirmed.
Antibiotics in pharmaceutical and aquaculture wastewater is a growing threat to the environment of world, due to the induction of drug-resistant bacteria and the harm to the aquatic organisms. Photocatalytic membrane, which has immobilized photocatalyst on membrane is an effective and environmentally friendly technology for antibiotics degradation. In this study, a novel photocatalytic membrane was prepared by loading ZnO/N-gC(3)N(4) composite on commercial polymer membrane with glutaraldehyde as a crosslinker through pressure driven filtration. The loading of the photocatalyst over the membranes was validated by Fourier transform infrared spectroscopy, scanning electron microscope and X-ray photoelectron spectroscopy. The photocatalytic properties of ZnO/N-g-C3N4 composite membrane were observed efficient for degradation of tetracycline, ciprofloxacin and ofloxacin in both immersion and filtration model under visible light (lambda > 420 nm). Especially, a ZnO/N-g-C3N4 loading amount of 1.12 g/cm(2) and glutaraldehyde concentration of 45% led to the degradation rate of 100% and 80% for tetracycline at 5 mg/L and 10 mg/L, respectively. Low trans-membrane pressure (0.005 MPa) and narrow membrane size (50 kDa) were favorable for antibiotics degradation in filtration model due to long reaction time on membrane surface. Construction and performance of ZnO/N-g-C3N4 composite membrane might provide new strategy for energy saving wastewater treatment. (c) 2022 The Author(s). Published by Elsevier B.V.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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