Symmetrically recombined nanofibers in a high-selectivity membrane for cation separation in high temperature and organic solvent

Zhao, Yan; Qiu, Yangbo; Mai, Zhaohuan; Ortega, E.; Shen, Jinwen; Gao, Congjie; Bruggen, Bart Van der

doi:10.1039/c9ta07416c

Cited by 31 publications

(21 citation statements)

References 43 publications

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“…Zhao et al reported a KANF-based CEM with a high performance for ion separation in ED with a maximum desalination efficiency of 99.7% after 220 min for Na 2 SO 4 and significant selectivity for monovalent cations. Moreover, KANF-based membranes demonstrate exceptional desalination at high temperatures (as high as 100 • C) and organic solvent/aqueous environments (as high as 80% acetone solution) [55]. Additionally, some studies reported the application of IEX-NFs as a composite along with BPMs.…”

Section: Membrane Separationmentioning

confidence: 99%

De Novo Ion-Exchange Membranes Based on Nanofibers

2021

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The unique functions of nanofibers (NFs) are based on their nanoscale cross-section, high specific surface area, and high molecular orientation, and/or their confined polymer chains inside the fibers. The introduction of ion-exchange (IEX) groups on the surface and/or inside the NFs provides de novo ion-exchangers. In particular, the combination of large surface areas and ionizable groups in the IEX-NFs improves their performance through indices such as extremely rapid ion-exchange kinetics and high ion-exchange capacities. In reality, the membranes based on ion-exchange NFs exhibit superior properties such as high catalytic efficiency, high ion-exchange and adsorption capacities, and high ionic conductivities. The present review highlights the fundamental aspects of IEX-NFs (i.e., their unique size-dependent properties), scalable production methods, and the recent advancements in their applications in catalysis, separation/adsorption processes, and fuel cells, as well as the future perspectives and endeavors of NF-based IEMs.

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Section: Membrane Separationmentioning

confidence: 99%

De Novo Ion-Exchange Membranes Based on Nanofibers

2021

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“…Furthermore, there are many valuable and essential ions in the hospital wastewater, which could be selectively separated or extracted for reuse such as Xe [101]. However, the coexistence of chemically similar ions in wastewater severely limits the extraction of these valuable ions [102,103]. Currently, the inevitability of environmental pollution and low-efficiency implementation of the traditional methodologies, including calcina- tion, adsorption, precipitation, and salting, limit the use of these methods in wastewater treatment [104].…”

Section: Radioactive Elements and Ionic Pollutantsmentioning

confidence: 99%

Membrane bioreactors for hospital wastewater treatment: recent advancements in membranes and processes

Zhao

Qiu

Mamrol

et al. 2021

Front. Chem. Sci. Eng.

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Discharged hospital wastewater contains various pathogenic microorganisms, antibiotic groups, toxic organic compounds, radioactive elements, and ionic pollutants. These contaminants harm the environment and human health causing the spread of disease. Thus, effective treatment of hospital wastewater is an urgent task for sustainable development. Membranes, with controllable porous and nonporous structures, have been rapidly developed for molecular separations. In particular, membrane bioreactor (MBR) technology demonstrated high removal efficiency toward organic compounds and low waste sludge production. To further enhance the separation efficiency and achieve material recovery from hospital waste streams, novel concepts of MBRs and their applications are rapidly evolved through hybridizing novel membranes (non hydrophilic ultrafiltration/microfiltration) into the MBR units (hybrid MBRs) or the MBR as a pretreatment step and integrating other membrane processes as subsequent secondary purification step (integrated MBR-membrane systems). However, there is a lack of reviews on the latest advancement in MBR technologies for hospital wastewater treatment, and analysis on its major challenges and future trends. This review started with an overview of main pollutants in common hospital wastewater, followed by an understanding on the key performance indicators/criteria in MBR membranes (i.e., solute selectivity) and processes (e.g., fouling). Then, an in-depth analysis was provided into the recent development of hybrid MBR and integrated MBR-membrane system concepts, and applications correlated with wastewater sources, with a particular focus on hospital wastewaters. It is anticipated that this review will shed light on the knowledge gaps in the field, highlighting the potential contribution of hybrid MBRs and integrated MBRmembrane systems toward global epidemic prevention.

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“…However, the use of traditional polymer membranes is limited to a specific temperature range and solvent selection 9 . In recent years, in order to meet the needs of complex industrial applications, researchers are committed to high performance polymer membrane materials, especially those with heat resistance and chemical corrosion resistance 10–13 …”

Section: Introductionmentioning

confidence: 99%

The effect of grafting monomer charge on the antifouling performance of poly(ether ether ketone) hollow fiber membrane by ultraviolet irradiation polymerization

Jiang

Huang

Chen

et al. 2020

Polymer International

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To improve the antifouling properties of poly(ether ether ketone) (PEEK) membrane, negatively charged acrylic acid (AA), neutral ethyl hydroxyacrylate (HEA) and positively charged acryloxyethyl trimethylammonium chloride (DAC) as hydrophilic monomers were respectively grafted onto the PEEK hollow fiber membrane surface via ultraviolet irradiation polymerization. The effects of the grafted monomers on surface chemical structure, surface morphology, zeta potential, hydrophilic performance, permeability and the antifouling properties of the membrane were investigated in detail. The results show that the charge state of the membrane surface is closer to the monomer charge characteristic, which obviously affects the permeability and antifouling performance of the membrane. The pure water flux of the membrane grafted with neutral hydrophilic HEA monomer is increased and the antifouling properties to bovine serum albumin (BSA) and sodium alginate (SA) are also enhanced, while the pure water flux of the membranes grafted with negatively charged AA monomer or positively charged DAC monomer is decreased, with different antifouling properties to BSA and SA. Furthermore, the antifouling experiment with BSA under different pH conditions revealed that membrane fouling depends on the pH value, and membrane fouling was the most serious at the isoelectric point of BSA. © 2020 Society of Chemical Industry

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Symmetrically recombined nanofibers in a high-selectivity membrane for cation separation in high temperature and organic solvent

Abstract: Symmetrically recombining poly(p-phenylene terephthalamide) nanofibers and 2,5-diaminobenzenesulfonic acid based on amide hydrolysis and amide condensation reaction for ion separation in high temperature and organic solvent environment.

Cited by 31 publications

References 43 publications

De Novo Ion-Exchange Membranes Based on Nanofibers

De Novo Ion-Exchange Membranes Based on Nanofibers

Membrane bioreactors for hospital wastewater treatment: recent advancements in membranes and processes

The effect of grafting monomer charge on the antifouling performance of poly(ether ether ketone) hollow fiber membrane by ultraviolet irradiation polymerization

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