Experimental test of TOYOBO membranes for seawater desalination at Las Palmas, Spain

Elguera, A. Muñoz; Núñez, Alejandro; NISHIDA, Mitsuo

doi:10.1016/s0011-9164(99)00123-x

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…It is mainly used as a material for dialysis membranes. Cellulose acetate is frequently blended with other polymers such as PSf or additives such as polyethylene glycol (PEG) to improve the membrane properties. ,− Cellulose triacetate can be used to form chlorine tolerant hollow fiber RO membranes. , …”

Section: Influence Of Various Parameters On Membrane Separation Perfo...mentioning

confidence: 99%

Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review

Guillen

Pan

et al. 2011

Ind. Eng. Chem. Res.

1,247

833

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The methods and mechanisms of nonsolvent induced phase separation have been studied for more than fifty years. Today, phase inversion membranes are widely used in numerous chemical industries, biotechnology, and environmental separation processes. The body of knowledge has grown exponentially in the past fifty years, which suggests the need for a critical review of the literature. Here we present a review of nonsolvent induced phase separation membrane preparation and characterization for many commonly used membrane polymers. The key factors in membrane preparation discussed include the solvent type, polymer type and concentration, nonsolvent system type and composition, additives to the polymer solution, and film casting conditions. A brief introduction to membrane characterization is also given, which includes membrane porosity and pore size distribution characterization, membrane physical and chemical properties characterization, and thermodynamic and kinetic evaluation of the phase inversion process. One aim of this review is to lay out the basics for selecting polymer-solvent-nonsolvent systems with appropriate film casting conditions to produce membranes with the desired performance, morphology, and stability, and to choose the proper way to characterize these properties of nonsolvent induced phase inversion membranes.

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Section: Influence Of Various Parameters On Membrane Separation Perfo...mentioning

confidence: 99%

Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review

Guillen

Pan

et al. 2011

Ind. Eng. Chem. Res.

1,247

833

View full text Add to dashboard Cite

show abstract

“…Nevertheless, CTA RO membranes are chlorine-resistant and thus residual chlorine can be maintained at up to 1 mg/L in the RO feed [13]. In fact, the CTA RO filtration in combination with chlorination can suppress biological growth on RO membrane surfaces and prevent an increase in feed pressure caused by membrane fouling in seawater desalination applications [14][15][16][17]. Thus, RO filtration using CTA RO membranes potentially has an advantage over PA-based thin-film composite RO membranes with respect to the control of biofouling and N-nitrosamine formation during water treatment.…”

Section: Introductionmentioning

confidence: 99%

Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane

et al. 2015

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Nghiem, L. D. (2015). Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane. Desalination, 368 69-75.Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane AbstractThe rejection behaviours of 41 trace organic chemicals (TrOCs) by a hollow fibre cellulose triacetate (CTA) reverse osmosis (RO) membrane for potable water reuse were evaluated. Results reported here suggest that the rejection behaviours of TrOCs by the CTA RO membrane are mostly similar to those previously reported for the polyamide (PA) RO membrane. However, in comparison to the PA based RO membrane, hydrophobic interaction plays a greater role while electrostatic interaction is less significant in governing the rejection of TrOCs by the CTA RO membrane. No difference in rejection between positively and negatively charged compounds by the CTA RO membrane could be observed. The rejection of neutral TrOCs by the CTA RO membrane varied significantly from 25% to over 95%. Molecular size (i.e. minimum projection area) was found to be an important factor governing the rejection of neutral TrOCs. Further investigation using Nnitrosamines reveals that in addition to molecular size, hydrophobicity could significantly influence their rejection by the CTA RO membrane, while N-nitrosamine rejection by the PA RO membrane was mostly governed by molecular size. In contrast to the neutral TrOCs, most charged TrOCs selected in this investigation exhibited over 90% rejection, regardless of molecular size.

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“…A comparison of the desalination performance of a modified PBI HF and a commercial HF module (made by Toyobo) is shown in Figure 12. The Toyobo product is Hollosep MH10255FI membrane, and its permeability is calculated according to the reported A value (1.5 × 10 −6 cm 3 /cm 2 s·[kg/cm 2 ]) [36]. Both our modified PBI HF and the Hollosep provide over 99% salt rejection and their water permeability is comparable.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Polybenzimidazole Hollow-Fiber Membranes for Reverse Osmosis and Nanofiltration by Changing the Spinning Air Gap

et al. 2018

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High-performance polybenzimidazole (PBI) hollow-fiber membranes (HFMs) were fabricated through a continuous dry-jet wet spinning process at SRI International. By adjusting the spinning air gap from 4″ (10.2 cm) to 0.5″ (1.3 cm), the HFM pore sizes were enlarged dramatically without any significant change of the fiber dimensional size and barrier layer thickness. When fabricated with an air gap of 2.5″ (6.4 cm) and a surface modified by NaClO solution, the PBI HFM performance was comparable to that of a commercial reverse osmosis (RO) HFM product from Toyobo in terms of salt (NaCl) rejection and water permeability. The PBI RO HFM was positively surface charged in acidic conditions (pH < 7), which enhanced salt rejection via the Donnan effect. With an air gap of 1.5″ (3.8 cm), the PBI HFM rejected MgSO4 and Na2SO4 above 95%, a result that compares favorably with that achieved by nanofiltration. In addition, the PBI HFM has a defect-free structure with an ultra-thin barrier layer and porous sublayer. We believe PBI HFMs are ideal for water purification and can be readily commercialized.

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Experimental test of TOYOBO membranes for seawater desalination at Las Palmas, Spain

Cited by 8 publications

References 2 publications

Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review

Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review

Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane

Preparation of Polybenzimidazole Hollow-Fiber Membranes for Reverse Osmosis and Nanofiltration by Changing the Spinning Air Gap

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