Extremely fouling resistant zwitterionic copolymer membranes with ~ 1 nm pore size for treating municipal, oily and textile wastewater streams

Bengani-Lutz, Prity; Zaf, R. D.; Çulfaz-Emecen, P. Zeynep; Asatekin, Ayşe

doi:10.1016/j.memsci.2017.08.058

Cited by 75 publications

(77 citation statements)

References 98 publications

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“…Water and small solutes permeate r-ZAC TFC membranes through a network of selfassembled zwitterionic nanochannels (Fig. 1B) (21,22,25). Unlike previous r-ZAC membranes, however, ZAC-X possesses exceptionally narrow nanochannels (<1.0 nm).…”

Section: Resultsmentioning

confidence: 91%

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Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes

Lounder

Asatekin

2021

Proc. Natl. Acad. Sci. U.S.A.

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Water filtration membranes with advanced ion selectivity are urgently needed for resource recovery and the production of clean drinking water. This work investigates the separation capabilities of cross-linked zwitterionic copolymer membranes, a self-assembled membrane system featuring subnanometer zwitterionic nanochannels. We demonstrate that selective zwitterion–anion interactions simultaneously control salt partitioning and diffusivity, with the permeabilities of NaClO4, NaI, NaBr, NaCl, NaF, and Na2SO4 spanning roughly three orders of magnitude over a wide range of feed concentrations. We model salt flux using a one-dimensional transport model based on the Maxwell–Stefan equations and show that diffusion is the dominant mode of transport for 1:1 sodium salts. Differences in zwitterion–Cl− and zwitterion–F− interactions granted these membranes with the ultrahigh Cl−/F− permselectivity (PCl-/PF- = 24), enabling high fluoride retention and high chloride passage even from saline mixtures of NaCl and NaF.

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Section: Resultsmentioning

confidence: 91%

“…hydrophilic nanochannels for the transport of water and small solutes. For a broad range of copolymer compositions (21,22,25), r-ZAC membranes possess pores that are too large to achieve ion selectivity.…”

Section: Significancementioning

confidence: 99%

Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes

Lounder

Asatekin

2021

Proc. Natl. Acad. Sci. U.S.A.

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“…Alleviating safe drinking water scarcity is an important global challenge, especially in developing countries and in regions with a dry climate. Filtration of wastewater for re‐use is favored here as it can be applied to common sources such as industrial wastewater outputs from petroleum extraction and refining, textile dyeing and finishing, food industries and even municipal wastewater to a more limited extent. Membrane fouling is defined as a decline in membrane performance due to the adsorption and accumulation of feed components, especially organic compounds, on the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Govinna

Kaner

Ceasar

et al. 2018

Polymer International

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Nonwoven super‐hydrophobic fiber membranes have potential applications in oil–water separation and membrane distillation, but fouling negatively impacts both applications. Membranes were prepared from blends comprising poly(vinylidene fluoride) (PVDF) and random zwitterionic copolymers of poly(methyl methacrylate) (PMMA) with sulfobetaine methacrylate (SBMA) or with sulfobetaine‐2‐vinylpyridine (SB2VP). PVDF imparts mechanical strength to the membrane, while the copolymers enhance fouling resistance. Blend composition was varied by controlling the PVDF‐to‐copolymer ratio. Nonwoven fiber membranes were obtained by electrospinning solutions of PVDF and the copolymers in a mixed solvent of N,N‐dimethylacetamide and acetone. The PVDF crystal phases and crystallinities of the blends were studied using wide‐angle X‐ray diffraction and differential scanning calorimetry (DSC). PVDF crystallized preferentially into its polar β‐phase, though its degree of crystallinity was reduced with increased addition of the random copolymers. Thermogravimetry (TG) showed that the degradation temperatures varied systematically with blend composition. PVDF blends with either copolymer showed significant increase of fouling resistance. Membranes prepared from blends containing 10% P(MMA‐ran‐SB2VP) had the highest fouling resistance, with a fivefold decrease in protein adsorption on the surface, compared to homopolymer PVDF. They also exhibited higher pure water flux, and better oil removal in oil–water separation experiments. © 2018 Society of Chemical Industry

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“…Combination of UF/NF/RO have been used in rendering plant wastewater (RPW) and the rand filtration was used as an effective pre-treatment for UF hence lowering membrane fouling [57]. Another form of membrane called membrane with a molecular weight cut-off (MWCO) was used to treat municipal and industrial wastewater, the obtained results showed complete resistance to irreversible fouling and high dye rejection [58]. UF and NF membranes have been used for waste stream purification also known as backwash water, which is obtained by washing filtration beds from swimming pool water system [59] (Table 1).…”

Section: Application Of Membrane Technology For Wastewater Treatmentmentioning

confidence: 99%

Wastewater Treatment Using Membrane Technology

Nqombolo¹,

Mpupa²,

Moutloali³

et al. 2018

Wastewater and Water Quality

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Water contamination by heavy metals, cyanides and dyes is increasing globally and needs to be addressed as this will lead to water scarcity as well as water quality. Different techniques have been used to clean and renew water for human consumption and agricultural purposes but they each have limitations. Among those techniques, membrane technology is promising to solve the issues. Nanotechnology present a great potential in wastewater treatment to improve treatment efficiency of wastewater treatment plants. In addition, nanotechnology supplement water supply through safe use of modern water sources. This chapter reviews recent development in membrane technology for wastewater treatment. Different types of membrane technologies, their properties, mechanisms advantages, limitations and promising solutions have been discussed.

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Extremely fouling resistant zwitterionic copolymer membranes with ~ 1 nm pore size for treating municipal, oily and textile wastewater streams

Cited by 75 publications

References 98 publications

Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes

Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes

Electrospun fiber membranes from blends of poly(vinylidene fluoride) with fouling‐resistant zwitterionic copolymers

Wastewater Treatment Using Membrane Technology

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