Positively charged nanofiltration membrane synthesis, transport models, and lanthanides separation

Léniz-Pizarro, Francisco; Liu, Chunqing; Colburn, Andrew; Escobar, Isabel C.; Bhattacharyya, Dibakar

doi:10.1016/j.memsci.2020.118973

Cited by 38 publications

(26 citation statements)

References 59 publications

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“…(a) Nanofiltration performance comparison of the PIP-TMC-PQ7 membrane with other TFC NF membranes reported in the literature. − (b) Effect of feed concentration on the nanofiltration performance of PIP-TMC-PQ7 (5 bar, 25 °C). (c) Effect of the running pressure on pure water flux of PIP-TMC-PQ7 (25 °C).…”

Section: Results and Discussionmentioning

confidence: 99%

“…The positively charged quaternary ammonium groups of PQ7 may endow the resultant polyamide NF membrane with a double charge. Therefore, the modified NF membranes are used for water softening. , In addition, as a cationic surfactant, PQ7 has the potential to strengthen membrane hydrophilicity and further improve the antifouling property of the resulting membrane.…”

Section: Introductionmentioning

confidence: 99%

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Polyamide Nanofiltration Membranes with Enhanced Desalination and Antifouling Performance Enabled by Surface Grafting Polyquaternium-7

Zhan

Zhang

Fang

et al. 2021

Ind. Eng. Chem. Res.

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Polyamide nanofiltration (NF) membranes with enhanced desalination and fouling resistance were fabricated via grafting N,N-dimethyl-N-2-propenyl-2-propene-1-ammonium chloride-2-propenamide (polyquaternium-7, PQ7), which consists of dimethyl diallyl ammonium chloride and acrylamide monomers. Compared to the control polyamide NF membrane, the PQ7grafting membrane exhibited higher hydrophilicity, rougher membrane surface, and stronger positive charge. The surface grafting process had no distinct influence on membrane thickness. After modification, the water flux of the resulting membrane improved from 47.8 to 79.6 L m −2 h −1 under 5 bar, showing a significant improvement in permeability. Meanwhile, the rejection to divalent ions was elevated to a superior level due to the introduction of the positively charged quaternary ammonium groups from PQ7. Furthermore, the antifouling evaluation indicated that the modified polyamide NF membrane owed superior flux recovery capacity and fouling resistance to both sodium alginate solution and bovine serum albumin. Owing to the low cost of the surface modifier and facile grafting process, this strategy has wide application potential in fabricating superior NF membranes used for water softening.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyamide Nanofiltration Membranes with Enhanced Desalination and Antifouling Performance Enabled by Surface Grafting Polyquaternium-7

Zhan

Zhang

Fang

et al. 2021

Ind. Eng. Chem. Res.

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“…A comprehensive and practical method for study the mechanism of NF is the Don-nan Steric Pore Model with dielectric exclusion (DSPM-DE). This method investigates the Extended Nernst-Planck equation for each ion species through the NF membrane and in order to verify the steric exclusion effects, Donnan exclusion, and dielectric exclusion, the boundary conditions are used at the membrane surfaces [48,49]. The Extended Nernst-Planck equation involves a combination of hindered diffusion, hindered advection, and electro-migration of solutes [50].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

et al. 2021

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The formation of heat stable salts (HSS) during the natural gas sweetening process by amine solvent causes many problems such as corrosion, foaming, capacity reduction, and amine loss. A modeling study was carried out for the removal of HSS ions from amine solution using nanofiltration (NF) membrane process that ensures the reuse of amine solution for gas sweetening. This model studies the physics of the nanofiltration process by adjusting and investigating pore radius, the effects of membrane charge, and other membrane characteristics. In this paper, the performance of the ternary ions was investigated during the removal process from methyl di-ethanol amine solution by the nanofiltration membrane process. Correlation between feed concentration and permeate concentration, using experimental results with mathematical correlation as Ci,p = f (Ci,f) was used in modeling. The results showed that the calculated data from the model provided a good agreement with experimental results (R2 = 0.90–0.75). Also, the effect of operating conditions (including feed pressure and feed flow rate on ions rejection and recovery ratio across the flat-sheet membrane) was studied. The results showed that the recovery and rejection ratios of the NF membrane depend on the driving pressure across the membrane. While the driving pressure is affected by the feed flow conditions and feed pressure.

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“…Moreover, solid phase extraction (SPE), adsorption, dry digestion, ion exchange chromatography and biosorption are available in addition to magnetic separation and electrostatic separation. The supporting practices which used in the physical ore extraction are usually such as activated charcoal, silica gel, activated alumina, zeolites, membranes and synthetic polymeric resins (Nasab et al, 2011;Ashour et al, 2016;Zhang et al, 2016b;Amaral et al, 2017;Hidayah, and Abidin, 2017;Quinn et al, 2017;Rivera et al, 2018;Cao et al, 2019;Ponou et al, 2019;Gupta et al, 2019;Chen et al, 2019;Léniz-Pizarro et al, 2021). Very strong acids carry out in the solvent extraction during the extraction process of REEs and then these chemicals leach out into the environment and be transported through water bodies and cause the acidification of aquatic environments.…”

Section: Introductionmentioning

confidence: 99%

“…Researchers will also contribute to green chemistry with the new adsorbents or membrane filters they will produce using the ionic radius of REEs (Karadağ et al, 2009;Karadaş, and Kara, 2014;Léniz-Pizarro et al, 2021). A specific potential application of membranes is the recovery of REEs from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

REE'lerin Belirlenmesine Yönelik Çeşitli Analitik Teknikler Üzerine Bir Derleme

Özcan

2021

International Journal of Pure and Applied Sciences

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Due to the transition from traditional energy sources to clean energy in recent years, it is stated that there will be a continuous increase in the need for REEs worldwide in the coming years owing to their especial physical and chemical properties. The principal sources of REEs are the minerals bastnazite, monazite, and xenotime, etc.. Rare earths have peculiar, unique properties and become essential in many high-tech applications. Therefore, the REEs is used for applications such as improvement of industrial. It is worth highlighting that the separation of rare earth can be both complex and challenging owing to similar properties which are shared to produce high quality and better quantity of REEs. In industrial production, complex ores containing rare earth elements are concentrated by physical ore beneficiation processes. For this, the processes proposed in this work possesses aguide on green chemistry, solvent extraction, membran filtration, adsorption of recovering REEs through stepwise extraction and enrichment technique. This review, attempts to provide notable information on the separation and purification efforts to date for the recovery of REEs.

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Positively charged nanofiltration membrane synthesis, transport models, and lanthanides separation

Cited by 38 publications

References 59 publications

Polyamide Nanofiltration Membranes with Enhanced Desalination and Antifouling Performance Enabled by Surface Grafting Polyquaternium-7

Polyamide Nanofiltration Membranes with Enhanced Desalination and Antifouling Performance Enabled by Surface Grafting Polyquaternium-7

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

REE'lerin Belirlenmesine Yönelik Çeşitli Analitik Teknikler Üzerine Bir Derleme

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