Fluxes and rejections for nanofiltration with solvent stable polymeric membranes in water, ethanol and n-hexane

Bruggen, Bart Van der; Geens, Jeroen; Vandecasteele, Carlo

doi:10.1016/s0009-2509(02)00125-2

Cited by 133 publications

(86 citation statements)

References 21 publications

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“…Using a more limited range of solutes, very similar behaviour to that shown in Figure 9 was measured for an n-heptane solvent, albeit with rejections ~5% below those recorded for xylene due to the increased membrane swelling. It is noted that zero rejections were previously reported by van der Bruggen et al 8 , who studied the behaviour of a 340 g mol -1 solute in a range of solvents with an MPF-50 membrane. They found that solute rejection was zero in n-hexane (but not in other solvents), and speculatively suggested that contact with organic solvents increases the mobility of the polymeric chains in the membrane to allow unhindered transport of solvent and solute.…”

Section: Effects Of Solute Sizementioning

confidence: 62%

“…This hypothesis was seemingly contradicted by the authors themselves as the measured solvent flux-pressure relationship remained linear over the tested pressure range. van der Bruggen et al 8 also studied solute rejection with an MPF-50 membrane, and again reported the extent of solute rejection to depend on the solvent type. Interestingly, the rejection in low-polarity solvents was found to be reduced when compared with that observed with polar solvents.…”

Section: Introductionmentioning

confidence: 99%

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Non-aqueous nanofiltration: solute rejection in low-polarity binary systems

Tarleton

Robinson

Millington

et al. 2005

Journal of Membrane Science

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Section: Effects Of Solute Sizementioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Non-aqueous nanofiltration: solute rejection in low-polarity binary systems

Tarleton

Robinson

Millington

et al. 2005

Journal of Membrane Science

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“…However, PSCMS-g-DGEBA/AuNPsPSNPs membranes showed lower flux compared with some commercial nanofiltration membranes such as MPF 50. The commercial membranes have a flux as high as 1600 l/m 2 h at a 20 bar transmembrane pressure (Van der Bruggen et al 2002). In this research, we have employed phase inversion technique to obtain skinned porous asymmetric membranes.…”

Section: Membrane Properties and Performancementioning

confidence: 99%

Nanofiltration membranes of poly(styrene-co-chloro-methylstyrene)-grafted-DGEBA reinforced with gold and polystyrene nanoparticles for water purification

Kausar

Siddiq

2015

Appl Water Sci

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The matrix material for nanofiltration membranes was prepared through chemical grafting of poly (styrene-co-chloromethylstyrene) (PSCMS) to DGEBA using hexamethylenediamine as linker. The phase inversion technique was used to form PSCMS-g-DGEBA membranes. This effort also involves the designing of gold nanoparticles and its composite nanoparticles with polystyrene microspheres as matrix reinforcement. The nanoporous morphology was observed at lower filler content and there was formation of nanopattern at increased nanofiller content. The tensile strength was improved from 32.5 to 35.2 MPa with the increase in AuNPs-PSNPs loading from 0.1 to 1 wt%. The glass transition temperature was also enhanced from 132 to 159°C. The membrane properties were measured via nanofiltration set-up. Higher pure water permeation flux, recovery, and salt rejection were measured for novel membranes. PSCMS-g-DGEBA/ AuNPs-PSNPs membrane with 1 wt% loading showed flux of 2.01 mL cm -2 min -1 and salt rejection ratio of 70.4 %. Efficiency of the gold/polystyrene nanoparticles reinforced membranes for the removal of Hg 2? and Pb 2 was found to be 99 %. Novel hybrid membranes possess fine characteristics to be utilized in industrial water treatment units.

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“…This effect might be due to the modification of the membrane surface polarity caused by the alcohol permeation. n-Propyl alcohol is slightly less polar than ethyl alcohol (dipole moments: ethyl alcohol 1.69 D, n-propyl alcohol 1.68 D, n-butyl alcohol 1.63 D), and immersion in less polar solvents may cause agglomeration of hydrophobic and hydrophilic sites on the membrane surface (van der Bruggen et al, 2002). Consequently, membranes may have their hydrophilicity reduced and the hexane flux could be increased.…”

Section: Membrane Conditioningmentioning

confidence: 99%

Solvent recovery from soybean oil/n-butane mixtures using a hollow fiber ultrafiltration membrane

Tres

Racoski

Nóbrega³

et al. 2014

Braz. J. Chem. Eng.

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-The aim of this work was the study on the separation of soybean oil/n-butane mixtures using a commercial hollow fiber ultrafiltration membrane (50 kDa). Oil/n-butane mixtures with mass ratios of 1:1 and 1:3 (wt), with the feed pressures of 5, 7 and 10 bar and transmembrane pressure of 1 bar were studied. Rejections of oil between 21 to 97.2%, oil fluxes between 0.04 and 0.98 kg/m 2 h and n-butane fluxes between 4 and 46 kg/m 2 h were observed, strongly influenced by the feed concentration. The increase in oil/n-butane mass ratio caused an increase in oil rejection and a decrease in the permeate flux of oil for most assays. The increase in the operating pressure caused an increase in oil flux and a consequent decrease in oil rejection. No degradation was observed in the membrane module during the operation with this non-aqueous feed stream, as confirmed by integrity tests.

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Fluxes and rejections for nanofiltration with solvent stable polymeric membranes in water, ethanol and n-hexane

Cited by 133 publications

References 21 publications

Non-aqueous nanofiltration: solute rejection in low-polarity binary systems

Non-aqueous nanofiltration: solute rejection in low-polarity binary systems

Nanofiltration membranes of poly(styrene-co-chloro-methylstyrene)-grafted-DGEBA reinforced with gold and polystyrene nanoparticles for water purification

Solvent recovery from soybean oil/n-butane mixtures using a hollow fiber ultrafiltration membrane

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