High-flux, high-selectivity loose nanofiltration membrane mixed with zwitterionic functionalized silica for dye/salt separation

Zhang, Yatao; Song, Qiangqiang; Xu, Liang; Wang, Jing; Yuanli, Jiang; Liu, Jindun

doi:10.1016/j.apsusc.2020.146005

Cited by 44 publications

(8 citation statements)

References 51 publications

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“…Figure3confirms that the TDS removal efficiency and ion sieving performance of all membranes are in the ranges of expected values for nanofiltration membranes reported in the literature 32,[35][36][37]. …”

supporting

confidence: 88%

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Heidari

Amirinejad

Mirzadeh

et al. 2021

Polymers for Advanced Techs

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Colloidal membrane fouling mechanisms were modeled for experimental data provided for nanofiltration of surface water by single and hybrid membrane systems.The hybrid system is composed of coagulation/activated carbon adsorption and bare polyethersulfone or mixed-matrix membranes. The comprehensive modeling of these membrane systems was performed by three explicit equations to evaluate the effects of combined cake-filtration and pore-blocking on the fouling processes. These equations were derived from Darcy's law applied under constant operating pressure. The results showed that by using the nonlinear regression method, the combined cake-filtration/pore-blocking models demonstrated more accurate fits to the experimental permeate volume data compared to individual blocking models. The accuracy achieved by such nonlinear fits is expressed in terms of a mean squared error of approximately 10 −10 (m 3 /m 2 ) 2 and R 2 > 0.999. Furthermore, the impact of a pretreatment stage and the type of membrane used to prevent or reduce the fouling are also investigated. Experimental results reveal that the colloidal fouling depends on the type of membrane and the characteristics of raw water and is not only related to the cake filtration.

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supporting

confidence: 88%

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Heidari

Amirinejad

Mirzadeh

et al. 2021

Polymers for Advanced Techs

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“…When LDHs was 5.88wt%, the degradation rate increased from 0.034min -1 to 0.3685min -1 , indicating that the Co-Ni LDHs/PES/PMS reaction system had a good removal effect on AO7. The uniformly dispersed Co-Ni LDHs/PES catalytic membrane was conducive to improving the effective contact area between the catalyst and PMS, significantly improved the catalytic rate (Zhang et al 2020). The interaction between PES and Co-Ni LDHs changed the surface properties of the films and the equilibrium of sol size during the film formation.…”

Section: Catalytic Activity Of Co-ni Ldhs/pes Catalytic Membranementioning

confidence: 98%

Co-Ni LDHs/PES Hybrid Membrane Synergizes With PMS to Effectively Degrade Orange Ⅱ

Zhou

Dong

Yuan

et al. 2021

Preprint

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The Co-Ni layered double hydroxides (Co-Ni LDHs) were prepared using co-precipitation method and Co-Ni LDHs hybrid polyethersulfone membranes (Co-Ni LDHs/PES) were prepared by phase inversion method, respectively. The products were characterized by FT-IR, XRD, SEM, TEM, EDX, TGA and tensile strength test. Results showed that the Co-Ni LDHs/PES membranes as prepared had excellent mechanical properties. The decrease of membrane contact angle and the increase of membrane water flux indicated that the hydrophilicity of Co-Ni LDHs/PES membrane can be improved. The hybrid membranes showed a good catalytic performance. As the loading of LDHs was 5mg·L-1, the dosage of PMS and AO7 was 1mmol·L-1 and 0.05mmol·L-1, respectively, the degradation rate of AO7 can reach 96.58% within 20 minutes. The ion leaching of Co-Ni LDHs/PES was much less than that of Co-Ni LDHs, so, the dosage of the Co-Ni LDHs was much less than of Co-Ni LDHs. After repeated used for four times, Co-Ni LDHs/PES still has good catalytic performance. The effects of Co-Ni LDHs dosage, PMS dosage, initial pH, Cl- and HA on the degradation of AO7 were investigated. The catalytic degradation mechanism of Co-Ni LDHs/PES was studied by free radical quenching experiments and XPS analysis. The main active species in the catalytic oxidation system are SO4-, OH, 1O2 and O2- among which 1O2 and O2- were the main active species.

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“…Stirring/sonication in the casting step, dosing surfactants to the solvents, and modifying NPs’ surfaces with functional groups, grafted oligomers, or noncovalently bound modifiers can provide better dispersion. Increased inorganic nanofiller–polymer compatibilities of several dye separation membranes were achieved through modification with silane coupling agents, , polymers, and carbon-based NPs. ,, These efforts overall improved membrane durability, hydrophilicity, and selectivity toward OMPs. Nonetheless, most bulk-modified nanocomposite membranes were studied at bench scale.…”

Section: Nanocomposite Polymeric Membranes For Omp Removalmentioning

confidence: 99%

Nanocomposite Polymeric Membranes for Organic Micropollutant Removal: A Critical Review

Chen

Lee

et al. 2022

ACS EST Eng.

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The prevalence of organic micropollutants (OMPs) and their persistence in water supplies have raised serious concerns for drinking water safety and public health. Conventional water treatment technologies, including adsorption and biological treatment, are known to be insufficient in treating OMPs and have demonstrated poor selectivity toward a wide range of OMPs. Pressure-driven membrane filtration has the potential to remove many OMPs detected in water with high selectivity as a membrane's molecular weight cutoff (MWCO), surface charge, and hydrophilicity can be easily tailored to a targeted OMP's size, charge and octanol−water partition coefficient (K ow ). Over the past 10 years, polymeric (nano)composite microfiltration (MF), ultrafiltration (UF), and nanofiltration (NF) membranes have been extensively synthesized and studied for their ability to remove OMPs. This review discusses the fate and transport of emerging OMPs in water, an assessment of conventional membrane-based technologies (NF, reverse osmosis (RO), forward osmosis (FO), membrane distillation (MD) and UF membrane-based hybrid processes) for their removal, and a comparison to the state-of-the-art nanoenabled membranes with enhanced selectivity toward specific OMPs in water. Nanoenabled membranes for OMP treatment are further discussed with respect to their permeabilities, enhanced properties, limitations, and future improvements.

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High-flux, high-selectivity loose nanofiltration membrane mixed with zwitterionic functionalized silica for dye/salt separation

Cited by 44 publications

References 51 publications

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Insights into colloidal membrane fouling mechanisms for nanofiltration of surface water using single and hybrid membrane processes

Co-Ni LDHs/PES Hybrid Membrane Synergizes With PMS to Effectively Degrade Orange Ⅱ

Nanocomposite Polymeric Membranes for Organic Micropollutant Removal: A Critical Review

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