Desalination of dye solution utilizing PVA/PVDF hollow fiber composite membrane modified with TiO2 nanoparticles

Li, Xipeng; Chen, Yingbo; Hu, Xiaoyu; Zhang, Yufeng; Hu, Linjia

doi:10.1016/j.memsci.2014.08.018

Cited by 130 publications

(36 citation statements)

References 41 publications

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“…Several well-established approaches have been done for chemical, physical, and biological treatment of dye-containing effluents during the last two decades, among which some are briefly discussed here [112][113][114].…”

Section: Tio 2 Photocatalysis In Waste Water Treatmentmentioning

confidence: 99%

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Bet-Moushoul

Mansourpanah

Farhadi

et al. 2016

Chemical Engineering Journal

344

130

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Section: Tio 2 Photocatalysis In Waste Water Treatmentmentioning

confidence: 99%

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Bet-Moushoul

Mansourpanah

Farhadi

et al. 2016

Chemical Engineering Journal

344

130

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“…Currently, most of the membrane studies are focused towards easy fabrication of composite membranes in a single step using methods such as surface segregation [20,21], solution casting [22][23][24], or dip-coating [25,26]. In the literature, many kinds of PVA-based hybrid membranes using silica constituents were reported [27][28][29], but the solution casting method is rarely used for directly fabricating PVA/SiO 2 membranes.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

et al. 2015

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We prepared poly(vinyl alcohol) (PVA)/SiO 2 and PVA/SiO 2 /glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small-and wideangle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (*1 nm) in the PVA/ SiO 2 membranes, while bigger submicron particles ([25 nm) were formed in the PVA/SiO 2 /GA membranes. The water uptake of the PVA/SiO 2 membranes increased with temperature, but the PVA/SiO 2 /GA membranes were completely dissolved above 50°C. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO 2 membranes. The thermal stability of the PVA/ SiO 2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO 2 / 4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO 2 /4T) at 250°C, showing high mechanical strength of these membranes.

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“…The commercial supporting membrane was firstly pre-treated with 1 M KOH solution at 65 • C water bath for different length (0.5, 1, 2, 6 and 8 h) [29,30]. The KOH treatment led to reduction in water contact angle due to the hydrophilization effect.…”

Section: Composite Membrane Preparationmentioning

confidence: 99%

Suppressing Salt Transport through Composite Pervaporation Membranes for Brine Desalination

Lei

Hou

et al. 2017

Applied Sciences

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Featured Application: The pervaporation membranes fabricated in this study can be potentially used for brine treatment.Abstract: Pervaporation membranes have gained renewed interest in challenging feedwaters desalination, such as reverse osmosis (RO) concentrated brine wastewater. In this study, composite polyvinyl alcohol (PVA)/polyvinylidene fluoride (PVDF) pervaporation membranes were prepared for brine treatment. The composite membrane was firstly studied by adjusting the cross-linking density of PVA by glutaraldehyde: the membrane with higher cross-linking density exhibited much higher salt rejection efficiency for long-term operation. A trace of salt on the permeate side was found to diffuse through the membrane in the form of hydrated ions, following solution-diffusion mechanism. To further suppress the salt transport and achieve long-term stable operation, graphene oxide (GO) was incorporated into the PVA layer: the addition of GO had minor effects on water permeation but significantly suppressed the salt passage, compared to the pure PVA/PVDF membranes. In terms of brine wastewater containing organic/inorganic foulant, improved anti-fouling performance was also observed with GO-containing membranes. Furthermore, the highest flux of 28 L/m 2 h was obtained for the membrane with 0.1 wt. % of GO using 100 g/L NaCl as the feed at 65 • C by optimising the pervaporation rig, with permeate conductivity below 1.2 µS/cm over 24 h (equivalent to a salt rejection of >99.99%).

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Desalination of dye solution utilizing PVA/PVDF hollow fiber composite membrane modified with TiO2 nanoparticles

Cited by 130 publications

References 41 publications

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Suppressing Salt Transport through Composite Pervaporation Membranes for Brine Desalination

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