Theoretical performance of nanofiltration membranes for wastewater treatment

Agboola, Oluranti; Maree, J. P.; Колесников, А. В.; Mbaya, Richard; Sadiku, Rotimi

doi:10.1007/s10311-014-0486-y

Cited by 38 publications

(13 citation statements)

References 40 publications

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“…The solute permeability was estimated based on Eq. ( 8) with the solute diffusivity as 1.61 × 10 -9 m 2 /s which was predicted by the Stokes-Einstein equation [57,58].…”

Section: Solute Permeability and Effective Membranes Thicknessmentioning

confidence: 93%

Assessment on Performance-properties of Asymmetric Nanofiltration Membranes from Polyethersulfone/n-Methyl-2-pyrrolidone/water Blends with Poly(vinyl pyrrolidone) as Additive

Rozali

Safari

Hassan

et al. 2021

Period. Polytech. Chem. Eng.

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In this study, the effect of poly(vinyl pyrrolidone) (PVP) additive on the fabrication of asymmetric nanofiltration (NF) membranes was investigated in terms of performance, structural details and key properties. On addition of PVP ranging from 2 to 10 wt% into the dope solution, the fabricated NF membranes exhibited significantly different in properties and improved performance. In particular, the membranes made from 2 wt% PVP had the highest water flux and salt rejection of about 3.61 × 10–6 m3/m2s and 44.49 %, respectively. Modeling results revealed that small amount of PVP (2–4 wt%) produced finer structural properties. Moreover, the key properties (rp, ∆x/Ak and ζ) of the fabricated NF membranes were found to be within the range of that of commercial NF membranes.

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“…The solute permeability was estimated based on Eq. ( 8) with the solute diffusivity as 1.61 × 10 -9 m 2 /s which was predicted by the Stokes-Einstein equation [57,58].…”

Section: Solute Permeability and Effective Membranes Thicknessmentioning

confidence: 93%

Assessment on Performance-properties of Asymmetric Nanofiltration Membranes from Polyethersulfone/n-Methyl-2-pyrrolidone/water Blends with Poly(vinyl pyrrolidone) as Additive

Rozali

Safari

Hassan

et al. 2021

Period. Polytech. Chem. Eng.

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“…As a pressure-driven membrane process, nanofiltration (NF) has been applied in a wide range of fields, such as water softening, brackish water reclamation and large molecular removal [ 1 , 2 , 3 , 4 , 5 , 6 ]. Most of these applications require membranes with both high permeability of water and high retention of solutes (i.e., high productivity with good selectivity).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

et al. 2019

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In recent decades, the advancements in layer-by-layer (LBL) assembly technology have provoked increasing interest in the preparation of multilayer polyelectrolyte membranes with excellent performance. In the current study, a novel nanofiltration (NF) membrane was prepared by pressure-driven layer-by-layer (LBL) assembly of polyethylenimine (PEI) and polyacrylicacid (PAA) on a porous substrate with chemical crosslinking. The effect of deposition pressure on separation performance of the prepared membranes was studied. The surface morphology, hydrophilicity and the charge property of the dynamically-deposited membranes were compared with those prepared by static adsorption. The characterization results showed that dynamic deposition process resulted in a smoother membrane surface with improved hydrophilicity. The mechanism of water-path formation was proposed to interpret the effect of pressure on the membrane performance. Glutaraldehyde (GA) was used as a crosslinker to reduce the number of polyelectrolyte bilayers for obtaining good separation performance. The rejections of different inorganic salts of the dynamically-deposited NF membrane were also investigated.

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“…This DSPM-DE model is found to be particularly effective in predicting the rejection ion Ca 2þ and Mg 2þ according to Bowen & Welfoot (2002b). Researchers who have recently developed a model for the NF system have also employed this DSPM-DE model which showed great reliability in predicting the membrane performance (Agboola et al 2015;Roy & Sharqawy 2015). For most NF systems, this dielectric exclusion mechanism dominates other mechanisms used to describe the dielectric exclusion, which involves image charges that build at the bulk solution-membrane interface (Bowen & Mohammad 1998;Bowen & Welfoot 2002a).…”

Section: Enhanced Model Of Ulpro Membrane Systemmentioning

confidence: 99%

“…The assumptions below were applied for the development of the model equations (Bowen & Yousef 2003;Agboola et al 2015):…”

Section: Enhanced Model Of Ulpro Membrane Systemmentioning

confidence: 99%

Enhanced modelling and experimental validation of ultra-low pressure reverse osmosis membrane system for treatment of synthetic brackish water

Norizam

Hussain

Junaidi

2021

Water Science and Technology

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Water purification from brackish water sources has been acknowledged as one of the most promising ways in producing drinkable water in water-scarce areas. In this study, an ultra-low pressure reverse osmosis (ULPRO) membrane was numerically and experimentally investigated to produce drinking water by the removal of sodium chloride salt which provides further validation of the model from a practical perspective. An enhanced predictive model based on Donnan-Steric Pore Model with dielectric exclusion (DSPM-DE) incorporating the osmotic effects was formulated in process simulation. The feed pressure and concentration were optimized as input variables and interaction between them was observed, while salt rejection and water recovery rate were taken as response attributes. The results obtained on the ULPRO membrane showed that the performance depends on the charge, steric, and dielectric effects. Furthermore, the enhanced model was validated with the experimental data attained from a lab-scale filtration system with good accuracy in the salt rejection and water recovery results. Comparing the enhanced DSPM-DE with the existing solution diffusion model reveals that the enhanced model predicts the membrane performance better and thereby qualifies itself as a reliable model for desalination of brackish water using ULPRO membrane.

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Theoretical performance of nanofiltration membranes for wastewater treatment

Cited by 38 publications

References 40 publications

Assessment on Performance-properties of Asymmetric Nanofiltration Membranes from Polyethersulfone/n-Methyl-2-pyrrolidone/water Blends with Poly(vinyl pyrrolidone) as Additive

Assessment on Performance-properties of Asymmetric Nanofiltration Membranes from Polyethersulfone/n-Methyl-2-pyrrolidone/water Blends with Poly(vinyl pyrrolidone) as Additive

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

Enhanced modelling and experimental validation of ultra-low pressure reverse osmosis membrane system for treatment of synthetic brackish water

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