Water Permeability Increase in Ultrafiltration Cellulose Acetate Membrane Containing Silver Nanoparticles

Pereira, Bruna da Silva; Moreti, Livia oliveira ruiz; Silva, Marcela Fernandes; Bergamasco, Rosângela; Piccioli, Angélica de Fátima Bortolato; Garcia, Edivaldo E.; Costa, Wilian Vidotto da; Pineda, Edgardo Alfonso Gómez; Oliveira, Daniela Martins Fernandes de; Hechenleitner, Ana Adelina Winkler

doi:10.1590/1980-5373-mr-2016-1074

Cited by 13 publications

(4 citation statements)

References 15 publications

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“…Even with all these properties suitable for producing good membranes, there are still problems with hydrophilicity. Therefore, some researchers try to solve this problem by adding inorganic materials to the polymer matrix 11,12 . Muhaman, Salim & Lau 13 , added SiO 2 nanoparticles on polyethersulfone membranes to improve hydrophilicity and consequently filtration in water treatment.…”

Section: Introductionmentioning

confidence: 99%

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

et al. 2019

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Polyethersulfone (PES) hollow fiber membranes were produced, containing 3% of two types of clay (Brasgel PA-MMT and Cloisite NA-CLNa), in order to modify the characteristics of the polyethersulfone membrane. By means of the X-ray diffraction, it was possible to observe an exfoliated and/or partially exfoliated structure in the membranes containing clay. From the analysis of contact angle, it was possible to notice an increase in the hydrophilicity of the membrane with the introduction of the clay. Through scanning electron microscopy (SEM), the morphology of the porous support of the membrane was modified with addition of clay, favoring greater uniformity of the pores and fingers. In the flow measurements with distilled water, the membranes with clay obtained the highest flows, being the greater flow with the Cloisite Na clay (~22 L/h.m 2) and was in agreement with the contact angle results. In the analysis of permeation with the oily emulsion, the membrane with Brasgel PA clay in its structure presented the greatest flow (~16 L/h.m 2) and the membrane with Cloisite Na presented the greatest yield (78.28%). Therefore, the clay acted by modifying both the morphology and the hydrophilicity of the polyethersulfone membrane, improving flow and yield.

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Section: Introductionmentioning

confidence: 99%

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

et al. 2019

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“…The broad peaks in the region of 2⊔ = 10-30°are characteristic peaks of the amorphous CA membrane. 25 In comparison to the XRD pattern of the M1 membrane, the M3 membrane displays the characteristic peaks related to the TiO 2 NPs, confirming the successful incorporation of TiO 2 into the CA nanocomposite membrane. No significant differences between the XRD pattern of the M3 and M7 samples can be attributed to the low percentage of the loaded Al 2 O 3 NPs.…”

Section: Resultsmentioning

confidence: 68%

“…The XRD patterns of the neat and the modified membranes are also illustrated in Figure 1. The broad peaks in the region of 2θ = 10–30° are characteristic peaks of the amorphous CA membrane 25 . In comparison to the XRD pattern of the M1 membrane, the M3 membrane displays the characteristic peaks related to the TiO 2 NPs, confirming the successful incorporation of TiO 2 into the CA nanocomposite membrane.…”

Section: Resultsmentioning

confidence: 74%

Enhanced performance and fouling resistance of cellulose acetate forward osmosis membrane with the spatial distribution of TiO₂ and Al₂O₃ nanoparticles

Baniasadi

Shabani

Mohammadi

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Novel nanocomposite membranes with spatial distribution of nanoparticles (NPs) were fabricated for forward osmosis (FO) applications. In this work, TiO 2 and Al 2 O 3 NPs were used as hydrophilic additives in order to improve the performance and fouling resistance of cellulose acetate (CA) FO membrane. RESULTS: Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) and x-ray diffraction (XRD) analyses confirmed the successful incorporation of the NPs into the synthesized membranes. The specific reverse salt flux (SRSF) of the TiO 2 modified membrane was reduced from 0.88 to 0.56 g L −1 , which was attributed to enhanced hydrophilicity, porosity, and the simultaneously improved water and salt permeability coefficients. After the evaluation of CA membranes with various contents of TiO 2 NPs, Al 2 O 3 NPs were added to the membrane structure as a secondary additive under the optimized content of TiO 2 NPs. Al 2 O 3 NPs have a higher dispersion in the membrane sublayer beneath, which can affect the hydrophilicity and surface charge of the membranes. Al 2 O 3 and TiO 2 modified membranes showed the lowest values of contact angle and zeta potential in neutral pH, which was 56.7°and − 68.4 mV, respectively. This membrane showed a water flux (WF) of 15 L m −2 h −1 and an SRSF of 0.36 g L −1 when using 1 mol L −1 NaCl as a draw solution. The fouling behavior of sodium alginate on the neat and modified membranes was also investigated, and the results showed a reduced fouling propensity and a superior fouling reversibility in the modified membranes. CONCLUSION: Based upon these findings, using low-density hydrophilic NPs in the membrane structure can fabricate membranes with more hydrophilicity, excellent FO performance, and high organic fouling resistance.

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“…Modification of membrane such as blending with inorganic nanoparticle enhances its hydrophilicity and exhibits antifouling property (Benavente et al, 2017;Pereira et al, 2018). Thus, the objective of this study is to investigate the performance of nano-Fe3O4 in improving the antifouling property of hydrophobic polyvinylidene fluoride (PVDF) membrane.…”

Section: Introductionmentioning

confidence: 99%

Nano Iron Oxide Impregnated Poly(Vinylidene Fluoride) Ultrafiltration Membrane for Palm Oil Mill Effluent Treatment

Ooi¹,

Chan²

2019

JETA

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Palm oil mill effluent (POME) is highly organic loaded liquid waste in the palm oil industry. Membrane technology is preferred as the tertiary treatment due to the high removal efficiency and low space requirement. However, membrane fouling is the drawback of membrane technology, which increases the operational cost. Thus, the objective of this research is to improve the anti-fouling property of poly(vinylidene-fluoride) (PVDF) membrane by using nano - Fe3O4 as the additive. Nano - Fe3O4 was synthesized through chemical reduction method, and it was proved by the Energy Dispersive X-ray spectroscopy (EDX) spectrum. The nano iron oxide was added to the Poly(vinylidene-fluoride)/ Polyvinylpyrrolidone solution and cast into membranes. The hydrophilicity of nano - Fe3O4 modified the membrane surface and improved the antifouling property. This was proved by the lower contact angle of PVDF/ nano - Fe3O4 membranes (70.99°) compared to the neat membrane (77.13o ). PVDF/ nano - Fe3O4 membranes exhibited better separation performance compared to the neat membrane, especially in BOD removal. PVDF/nano iron oxide membrane removed 94.73% of BOD while 88.67% BOD was removed by the neat membrane. At the same time, the membranes exhibited consistent COD and TSS removal in the first 5 cycles in treating POME. A slight reduction in BOD removal was observed from the first cycle to the fifth cycle suggested the use of other membrane cleaning method is required to remove the foulants. In conclusion, nano - Fe3O4 improved the anti-fouling property of PVDF membrane, and a comprehensive 12 study on membrane cleaning shall be conducted in the near future for sustainable use.

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Water Permeability Increase in Ultrafiltration Cellulose Acetate Membrane Containing Silver Nanoparticles

Cited by 13 publications

References 15 publications

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

Enhanced performance and fouling resistance of cellulose acetate forward osmosis membrane with the spatial distribution of TiO₂ and Al₂O₃ nanoparticles

Nano Iron Oxide Impregnated Poly(Vinylidene Fluoride) Ultrafiltration Membrane for Palm Oil Mill Effluent Treatment

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Water Permeability Increase in Ultrafiltration Cellulose Acetate Membrane Containing Silver Nanoparticles

Cited by 13 publications

References 15 publications

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

Enhanced performance and fouling resistance of cellulose acetate forward osmosis membrane with the spatial distribution of TiO2 and Al2O3 nanoparticles

Nano Iron Oxide Impregnated Poly(Vinylidene Fluoride) Ultrafiltration Membrane for Palm Oil Mill Effluent Treatment

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Product

Resources

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Enhanced performance and fouling resistance of cellulose acetate forward osmosis membrane with the spatial distribution of TiO₂ and Al₂O₃ nanoparticles