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Conventional Ultrafiltration As Effective Strategy for Dye/Salt Fractionation in Textile Wastewater Treatment

Open access
Jiang, Mei, Ye, Kunfeng, Deng, Jiajie, Lin, Jiuyang, Ye, Wenyuan, Zhao, Shuaifei, Van der Bruggen, Bart·2018·Environmental Science & Technology

Abstract

Use of tight ultrafiltration (UF) membranes has created a new pathway in fractionation of dye/salt mixtures from textile wastewater for sustainable resource recovery. Unexpectedly, a consistently high rejection for the dyes with smaller sizes related to the pore sizes of tight UF membranes is yielded. The potential mechanism involved in this puzzle remains unclear. In this study, seven tailored UF membranes with molecular weight cut-offs (MWCOs) from 6050 to 17530 Da were applied to separate dye/salt mixtures. These UF membranes allowed a complete transfer for NaCl and Na 2 SO 4, due to large pore sizes. Additionally, these UF membranes had acceptably high rejections for direct and reactive dyes, due to the aggregation of dyes as clusters for enhanced sizes and low diffusivity. Specifically, the membrane with an MWCO of 7310 Da showed a complete rejection for reactive blue 2 and direct dyes. An integrated UF-diafiltration process was subsequently designed for fractionation of reactive blue 2/Na 2 SO 4 mixture, achieving 99.84% desalination efficiency and 97.47% dye recovery. Furthermore, reactive blue 2 can be concentrated from 2.01 to 31.80 g·L –1 . These results indicate that UF membranes even with porous structures are promising for effective fractionation of dyes and salts in sustainable textile wastewater treatment.

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Metadata

Authors
Jiang, M., Ye, K., Deng, J., Lin, J., Ye, W., Zhao, S., & Van der Bruggen, B.
Venue
Environmental Science & Technology
Published
2018-08-17
Volume
52
Issue
18
Pages
10698-10708
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2885720696
Cited by
331
References
22
FWCI
12.84
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Conventional Ultrafiltration As Effective Strategy for Dye/Salt Fractionation in Textile Wastewater Treatment. https://app.cochat.ai/papers/10.1021/acs.est.8b02984
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Jiang, M., Ye, K., Deng, J., Lin, J., Ye, W., Zhao, S., & Van der Bruggen, B. (2018). Conventional Ultrafiltration As Effective Strategy for Dye/Salt Fractionation in Textile Wastewater Treatment. Environmental Science & Technology. https://doi.org/10.1021/acs.est.8b02984

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