Highly permeable benzene-trisulfonyl chloride-based polysulfonamide membranes fabricated by interfacial polymerization for acid-resistant nanofiltration

Lai, W.; Liu, Lu; Bai, Ju; Xiao, Luqi; Jiao, Yang; Yang, Yongqiang; Shan, Linglong; Luo, Shuangjiang

doi:10.1016/j.cej.2023.141708

Cited by 23 publications

(5 citation statements)

References 74 publications

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“…The RE rejection ( R RE ) of the NF membrane was calculated by eq R normalR normalE = C 0 − C normalp C 0 × 100 % where C 0 and C p are the RECl 3 concentrations in the NF feed and the permeate solution, respectively.…”

Section: Resultsmentioning

confidence: 99%

Acid-Resistant Nanofiltration Facilitated Nonsaponified Extraction of Rare-Earth Elements

Lai

Bai

et al. 2023

Ind. Eng. Chem. Res.

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The conventional extraction of rare-earth (RE) elements by alkali saponification consumes plenty of alkalis and produces enormous amounts of salt effluents. Herein, we proposed a novel environmentally friendly nonsaponified RE extraction process facilitated by an acid-resistant nanofiltration (NF) membrane, in which the nonsaponified organic phase directly is extracted with the RE feed repeatedly by a multistage cross-current approach and the exchanged acid in the raffinate is removed by the acid-resistant NF membrane with the deacidified raffinate recycled for nonsaponified extraction. Using YCl3 as the model sample, the feed RE concentration of the nonsaponified extraction was optimized in the range of 0.1–1.0 mol L–1, and a high RE concentration of 0.21 mol L–1 in the organic phase and an average extraction rate of 89.8% were obtained after seven-stage extraction at a RE feed concentration of 0.1 mol L–1. In total, 99% of the acid in the raffinate was removed by the commercial Duracid NF1812 acid-resistant NF membrane under an optimized RECl3 concentration of 4.9 g L–1, along with a recovered pH value of ∼3, resulting in a high total RE yield of 99.6%. The acid-resistant NF-facilitated nonsaponified extraction process featuring a high RE extraction rate and organic RE concentration, the absence of alkali consumption and salinity effluent emission, and eco-recycling of the raffinate renders the separation of RE elements a versatilely sustainable and green process.

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Section: Resultsmentioning

confidence: 99%

Acid-Resistant Nanofiltration Facilitated Nonsaponified Extraction of Rare-Earth Elements

Lai

Bai

et al. 2023

Ind. Eng. Chem. Res.

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“…In addition, the molecular weight cutoff (MWCO) of the M-TA-NGQDs membrane was about 457 Da when the rejection of PEG was 90% (Figure S12a), and the corresponding Stokes radius was around 0.507 nm. The mean effective pore size radius (μ p ) of the membrane was about 0.368 nm with a relatively narrow pore size distribution (full width at half-maximum, FWHM: ∼0.41 nm) (Figure S12b), indicating that the M-TA-NGQDs membrane possessed relatively uniform pores . According to the properties of dyes in Table S4, the majority of the molecular weights of dyes was slightly smaller than the MWCO of the membrane.…”

Section: Resultsmentioning

confidence: 99%

“…The mean effective pore size radius (μ p ) of the membrane was about 0.368 nm with a relatively narrow pore size distribution (full width at halfmaximum, FWHM: ∼0.41 nm) (Figure S12b), indicating that the M-TA-NGQDs membrane possessed relatively uniform pores. 48 According to the properties of dyes in Table S4, the majority of the molecular weights of dyes was slightly smaller than the MWCO of the membrane. However, a high rejection rate (>99%) was obtained for the membrane toward the small molecular MO.…”

Section: Dye/salt Separation Performance Of the M-ta-ngqds Membranementioning

confidence: 99%

Antifouling and Chemical-Resistant Nanofiltration Membrane Modulated by a Functionalized MWCNT Interlayer for Efficient Dye/Salt Separation at High Salinity

Gong

Fang

et al. 2023

ACS Appl. Mater. Interfaces

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Dye/salt separation in textile wastewater is of great importance. Membrane filtration technology is an environmentally friendly and effective approach to solve this issue. In this study, a thin-film composite membrane with a tannic acid (TA)-modified carboxylic multiwalled carbon nanotube (MWCNT) interlayer (M-TA) was prepared by interfacial polymerization with aminofunctionalized graphene quantum dots (NGQDs) acting as aqueous monomers. The addition of the M-TA interlayer favored the formation of a thinner, more hydrophilic, and smoother selective skin layer for the composite membrane. The pure water permeability of the M-TA-NGQDs membrane was ∼9.32 L m −2 h −1 bar −1 , which was higher than that of the NGQDs membrane without the interlayer. Meanwhile, the M-TA-NGQDs membrane presented better methyl orange (MO) rejection (97.79%) than the NGQDs membrane (87.51%). The optimal M-TA-NGQDs membrane exhibited excellent dye rejection (Congo red (CR): 99.61%; brilliant green (BG): 96.04%) and low salt rejection (NaCl < 15%). Noticeably, the M-TA-NGQDs membrane displayed effective selective separation performance (CR and BG > 99%) for dye/NaCl mixed solutions even at a high NaCl concentration of 50,000 mg/L. Furthermore, the M-TA-NGQDs membrane presented high water permeability recovery ratio values (91.02−98.20%). Importantly, the M-TA-NGQDs membrane showed excellent chemical stability (acid/alkali resistance). Generally, the fabricated M-TA-NGQDs membrane exhibited a great prospect for applications in dye wastewater treatment and water recycling, especially for the effective selective separation of dye/salt mixtures for high-salinity textile dyeing wastewater.

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“…Interfacial polymerization method. Interfacial synthesis is a widely used method for the preparation of polymer films 36 such as polyamide nanofilms [37][38][39][40][41][42] and graphene nanomembranes. 43,44 In this method, the reaction between the reactive monomers occurs at the interface and COF growth is restricted to a limited interfacial region, leading to the formation of thin membranes.…”

Section: Bottom-upmentioning

confidence: 99%

Recent advances of pure/independent covalent organic framework membrane materials: preparation, properties and separation applications

Cai,

Yu,

et al. 2024

Nanoscale

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Highly permeable benzene-trisulfonyl chloride-based polysulfonamide membranes fabricated by interfacial polymerization for acid-resistant nanofiltration

Cited by 23 publications

References 74 publications

Acid-Resistant Nanofiltration Facilitated Nonsaponified Extraction of Rare-Earth Elements

Acid-Resistant Nanofiltration Facilitated Nonsaponified Extraction of Rare-Earth Elements

Antifouling and Chemical-Resistant Nanofiltration Membrane Modulated by a Functionalized MWCNT Interlayer for Efficient Dye/Salt Separation at High Salinity

Recent advances of pure/independent covalent organic framework membrane materials: preparation, properties and separation applications

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