Bio-inspired PDA@WS2 polyacrylonitrile ultrafiltration membrane for the effective separation of saline oily wastewater and the removal of soluble dye

Temitope Fausat Ajibade; Huali Tian; Kayode Hassan Lasisi; Kaisong Zhang

doi:10.1016/j.seppur.2022.121711

Bio-inspired PDA@WS₂ polyacrylonitrile ultrafiltration membrane for the effective separation of saline oily wastewater and the removal of soluble dye

Temitope Fausat Ajibade, Huali Tian, Kayode Hassan Lasisi, Kaisong Zhang

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

32 Citations (SciVal)

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Abstract

The use of membrane filtration for saline oily wastewater separation remains challenging for industry application despite the progress in membrane technology. The use of two-dimensional (2D) nanoparticles is well known for improving membrane properties, yet they are still vulnerable to fouling and operational inconsistencies. In providing solutions, bio-inspired PDA@WS₂ PAN UF membrane was fabricated with tailored molecular weight cutoff (MWCO) and excellent selectivity for effective removal of oil and dye in a saline environment. At high salinity, the modified membrane with the lowest MWCO of 5308.53 Da and Stokes diameter of 2.17 nm showed sufficient separation of oil and dye of about 99.53% and 98.23% respectively. Concurrently sustaining high water permeability of 58.57 L m⁻²h⁻¹ with free transport of monovalent and divalent salts. Moreover, due to the synergistic effect of the adhesive PDA with WS₂ nanosheet and PAN, the modified membrane displayed outstanding oil repellency and antifouling properties of about 98.6%. Furthermore, excellent thermal stability between the temperature of 100–900 °C, and pressure stability ranging from 1 bar to 6 bar of the modified membranes was reported. Overall, the operational stability of the modified membrane was sustained with high removal of oil and dye, and permeation of salt over a 90 h long-term operation. Consequently, this study demonstrates the potential application of bio-inspired PDA@WS₂ PAN membrane for the treatment of saline oily wastewater.

Original language	English
Article number	121711
Number of pages	15
Journal	Separation and Purification Technology
Volume	299
Early online date	15 Jul 2022
DOIs	https://doi.org/10.1016/j.seppur.2022.121711
Publication status	Published - 15 Oct 2022

Data Availability Statement

Data will be made available on request.

Acknowledgements

The authors also appreciate Hongyun Ren and Zhen Xu at the Center of Analysis & Measurement from the Institute of Urban Environment, CAS for the TEM and XPS measurement, respectively, and also Danmei Pan from Fujian Institute of Research on the Structure of Matter, CAS for the AFM test.

Funding

This work was funded by grants from the National Key R&D Program of China (2021YFC3201402), Ministry of Science and Technology; the Bureau of Frontier Sciences and Education (QYZDB-SSWDQC044), the Bureau of International Cooperation (132C35KYSB20160018), the Chinese Academy of Sciences and the Joint Project between CAS-CSIRO (132C35KYSB20170051) and FJIRSM & IUE Joint Research Fund (No. RHZX-2019-002). T.F Ajibade appreciates Chinese Academy of Sciences The World Academy of Sciences (CAS-TWAS) for the President’s Fellowship. The authors acknowledge Oxiamembrane Co., Ltd. for financial and technical support.

Keywords

Antifouling properties
Dopamine
Operational stability
Saline oily wastewater
Tungsten disulfide nanosheet

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

Access to Document

10.1016/j.seppur.2022.121711

Ajibade Temitope et al.2022Final published version, 8.25 MBLicence: CC BY-NC-ND

Cite this

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title = "Bio-inspired PDA@WS2 polyacrylonitrile ultrafiltration membrane for the effective separation of saline oily wastewater and the removal of soluble dye",

abstract = "The use of membrane filtration for saline oily wastewater separation remains challenging for industry application despite the progress in membrane technology. The use of two-dimensional (2D) nanoparticles is well known for improving membrane properties, yet they are still vulnerable to fouling and operational inconsistencies. In providing solutions, bio-inspired PDA@WS2 PAN UF membrane was fabricated with tailored molecular weight cutoff (MWCO) and excellent selectivity for effective removal of oil and dye in a saline environment. At high salinity, the modified membrane with the lowest MWCO of 5308.53 Da and Stokes diameter of 2.17 nm showed sufficient separation of oil and dye of about 99.53\% and 98.23\% respectively. Concurrently sustaining high water permeability of 58.57 L m−2h−1 with free transport of monovalent and divalent salts. Moreover, due to the synergistic effect of the adhesive PDA with WS2 nanosheet and PAN, the modified membrane displayed outstanding oil repellency and antifouling properties of about 98.6\%. Furthermore, excellent thermal stability between the temperature of 100–900 °C, and pressure stability ranging from 1 bar to 6 bar of the modified membranes was reported. Overall, the operational stability of the modified membrane was sustained with high removal of oil and dye, and permeation of salt over a 90 h long-term operation. Consequently, this study demonstrates the potential application of bio-inspired PDA@WS2 PAN membrane for the treatment of saline oily wastewater.",

keywords = "Antifouling properties, Dopamine, Operational stability, Saline oily wastewater, Tungsten disulfide nanosheet",

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AU - Zhang, Kaisong

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