Energy-efficient trehalose-based polyester nanofiltration membranes for zero-discharge textile wastewater treatment

Recovery of water, salts, and hazardous dye from complex saline textile wastewater faces obstacles in separating dissolved ionic substances and recovering organic components during desalination. This study realized the simultaneous fractionation, desalination, and dye removal/recovery treatment of t...

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Bibliographic Details
Published in:Journal of hazardous materials 2024-03, Vol.465, p.133059-133059, Article 133059
Main Authors: Luo, Xiongwei, Jiang, Lei, Zhao, Rui, Wang, Yue, Xiao, Xin, Ghazouani, Sabrine, Yu, Lihua, Mai, Zhaohuan, Matsuyama, Hideto, Jin, Pengrui
Format: Article
Language:English
Subjects:
carbon
desalination
dyes
energy conservation
energy efficiency
Energy-efficient loose nanofiltration
fractionation
microstructure
nanofiltration
permeability
Polyester
polyesters
polymerization
textile mill effluents
Trehalose
wastewater treatment
Zero-discharge
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Summary:Recovery of water, salts, and hazardous dye from complex saline textile wastewater faces obstacles in separating dissolved ionic substances and recovering organic components during desalination. This study realized the simultaneous fractionation, desalination, and dye removal/recovery treatment of textile wastewater by using trehalose (Tre) as an aqueous monomer to prepare polyester loose nanofiltration (LNF) membrane with fine control microstructure via interfacial polymerization. Outperforming the NF270 commercial membrane, the Tre-1.05/TMC optimized membrane achieves zero-discharge textile wastewater treatment, cutting energy consumption by 295% and reducing water consumption by 42.8%. This efficiency surge results from remarkable water permeability (130.83 L m−2 h−1 bar−1) and impressive dye desalination (NaCl/ Direct Red 23 separation factor of 275) of the Tre-1.05/TMC membrane. For a deeper comprehension of filtration performance, the sieving mechanism of polyester LNF membranes was systematically elucidated. This strategic approach offers significant prospects for energy conservation, carbon emission mitigation, and enhanced feasibility of membrane-based wastewater treatment systems. [Display omitted] ●Trehalose-based membranes with precise microstructure design.●Creating energy-efficient zero-discharge process for high-salt textile Wastewater.●The sieving mechanism of polyester loose NF was systematically Elucidated.●The optimized membrane filtrates simulated textile wastewater from industry.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2023.133059