Protein-folding-inspired approach for UF fouling mitigation using elevated membrane cleaning temperature and residual hydrophobic-modified flocculant after flocculation-sedimentation pre-treatment

Wang, Zhangzheng; Chen, Ruhui; Li, Yunyun; Yang, Weiben; Tian, Ziqi; Graham, Nigel; Yang, Zhen

doi:10.1016/j.watres.2023.119942

Cited by 7 publications

(1 citation statement)

References 43 publications

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“…Wang and Yang et al prepared a series of flocculants with different hydrophilicities by introducing hydrophobic groups into the CS structure. In addition, they demonstrated that flocculants with moderate hydrophobicity ( n cs : n acrylipiperidine = 1:20) can effectively avoid the formation of high proportions of intramolecular hydrogen bonds, with higher removal performance (antibiotic, 40% → 80%) and lower membrane fouling contribution (suppressed reversible, 49.8%–61.3%; irreversible, 73.9%–83.3%). − Zheng et al adopted the synthesis strategy of CS graft copolymerization with AM to prepare a flocculant with a positive azo dye removal performance. In the structure of the flocculant, the −CN bond has a strong interaction with azo dyes, which are considered the main active sites for effective flocculation …”

Section: Sources and Structures Of Waste Polysaccharidesmentioning

confidence: 99%

A Review of Natural Polysaccharides-Based Flocculants Derived from Waste: Application Efficiency, Function Mechanism, and Development Prospects

Zhang,

Li,

et al. 2023

Ind. Eng. Chem. Res.

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The application of conventional flocculants always causes degenerative diseases, whereas natural polysaccharide (NPs)-based flocculants exhibit great potential, due to their biosafety. Considering material costs and sustainable development, NPs derived from waste have been extensively researched as a substitute for conventional flocculants, promoting the development of flocculation process toward safety, economy, and low-carbon direction. This review summarizes various waste polysaccharides (WPs) derived from ocean waste, agricultural waste, food waste, and invasive species. It then compares the treatment effects of typical WPs-based flocculants in water treatment. Flocculation mechanism of WPs-based flocculants was emphasized based on their respective structures and physicochemical properties. Moreover, flaws in WPs application have been noted, and strategies to deal with them have also been proposed. Benefiting from the environmental and economic benefits of WPs, the progress of using WPs-based flocculants is promising. However, some threats should be overcome, especially in terms of the stability and broad-spectrum applicability of WPs.

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