Novel PA/PVDF hollow fiber nanofiltration membrane with high permeability and Ca2+/antibiotics selectivity for drinking water purification

Yuanhui Tang; Jihao Zhu; Huifang Yu; Fanchen Zhang; Song Hu; Hedi Chen; Chunhui Zhang; Huanhuan Wu; Lixin Yu; Xiaolin Wang; Haihui Wang; Li Ding; Yakai Lin

Advanced Membranes (Jan 2024)

Novel PA/PVDF hollow fiber nanofiltration membrane with high permeability and Ca2+/antibiotics selectivity for drinking water purification

Yuanhui Tang,
Jihao Zhu,
Huifang Yu,
Fanchen Zhang,
Song Hu,
Hedi Chen,
Chunhui Zhang,
Huanhuan Wu,
Lixin Yu,
Xiaolin Wang,
Haihui Wang,
Li Ding,
Yakai Lin

Affiliations

Yuanhui Tang: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Jihao Zhu: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Huifang Yu: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Fanchen Zhang: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Song Hu: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
Hedi Chen: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Chunhui Zhang: School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
Huanhuan Wu: Department of Municipal and Environmental Engineering, School of Environment, Beijing Jiaotong University, Beijing, 100044, China; Corresponding author.
Lixin Yu: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
Xiaolin Wang: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
Haihui Wang: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
Li Ding: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
Yakai Lin: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China; Corresponding author.

Journal volume & issue: Vol. 4
p. 100102

Abstract

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Emerging contaminants, including antibiotics, threaten water safety and public health. To remove these contaminants while retaining beneficial minerals in water, such as calcium (Ca), a novel thin-film composite nanofiltration (NF) membrane was manufactured through polymerization of a barrier layer composed of polypiperazine amide onto polyvinylidene fluoride (PVDF) hollow fiber (HF) substrate. The pore size of the PVDF surface was refined by introducing poly(vinylpyrrolidone) via a thermally induced phase separation method. Then piperazine (PIP) and trimesoyl chloride were selected to synthesize the NF membrane by interfacial polymerization with NaHCO3 as an additive. The influence of PIP concentration on the membrane morphology and separation performance was investigated. The optimized HF NF membrane (NF3) exhibited high water permeability (8.08 L/(m2 h bar)) due to its strong hydrophilicity. It also demonstrated a molecular weight cut-off of 378 Da and an enhanced negative surface charge (−43.96 mV), which was beneficial for the exclusion of antibiotics and passage of Ca2+. The high tetracycline rejection (98.9 %) enabled the NF3 membrane to achieve superior Ca2+/antibiotic selectivity (37.27) compared with most commercially available NF membranes. This study offers novel insights into tailoring the mineral/micropollutant selectivity of HF NF membranes for drinking water purification.

Published in Advanced Membranes

ISSN: 2772-8234 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology: Chemical engineering
Website: https://www.keaipublishing.com/en/journals/advanced-membranes/

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