A green strategy to immobilize silver nanoparticles onto reverse osmosis membrane for enhanced anti-biofouling property

Dong, Chunming; Wang, Zhi; Wu, Junhui; Wang, Yao; Wang, Jixiao; Wang, Shichang

doi:10.1016/j.desal.2016.06.034

Cited by 146 publications

(68 citation statements)

References 41 publications

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“…The second step involved the in situ formation of Ag NPs, which was induced by the TA coating. As a result, some of the phenolic hydroxyl groups were oxidized into quine structures, as revealed by other reports . We observed that the whole membrane‐modification process was carried out with green and low‐cost reagents under mild and facile conditions.…”

Section: Resultssupporting

confidence: 53%

“…To endow membranes with antifouling properties, TA was used to coordinate with ferric iron [Fe(III)] . The mild reducing properties of TA in the complex also made it a good candidate for the in situ formation of Ag NPs on membranes . Unlike conventional chemical reduction by NaBH 4 , which first requires the complexation of free silver ions on the membrane followed by contact with a reducing agent, the TA‐induced in situ formation of Ag NPs initiated from the coordination of TA–Fe(III), which acts as an intermediate coating layer, followed by contact with silver‐ion solutions, which is beneficial for firm immobilization of Ag NPs .…”

Section: Introductionmentioning

confidence: 99%

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Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Zhao

Nguyen

et al. 2018

J of Applied Polymer Sci

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The construction of antifouling membranes has been a desirable approach for addressing membrane‐fouling issues in the ultrafiltration (UF) process. Antifouling means antiadhesive and antimicrobial; however, few researchers have achieved both properties in a facile and effective manner. In this article, we report a direct tannic acid (TA) coating method combined with the in situ deposition of silver nanoparticles (Ag NPs); this was used to improve the antifouling properties of a positively charged polymeric UF membrane. The results show that the TA–Ag NP modified membranes showed improved protein resistance (flux recovery rate = 71.2% after modification vs 17.8% before modification) and less attachment of bacteria (Escherichia coli K1) on the membrane surface and reduced cell viability in the resulting bacterial suspension (reduced by ≥90%) because of the combined antimicrobial properties of both the TA and Ag NPs. This indicated that our modification method was promising for UF membrane antifouling applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47314.

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Section: Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Zhao

Nguyen

et al. 2018

J of Applied Polymer Sci

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“…This is because the grafting of PEI leads to an increase in the transmembrane resistance of water, so the water flux of the modified membrane decreased to varying degrees. The change of surface charge properties of the modified membrane may lead to a significant increase in the reverse flux of salt [13]. Fig.3 The permeability of different membranes As shown in Table 1, the composite membranes had higher a values before and after modification, but the modified membrane a values decreased slightly.…”

Section: Characterization Of Membranesmentioning

confidence: 96%

Improving Anti-fouling Properties of Polyamide Forward Osmosis Membrane by grafting Poly ethylenimine and silver nanoparticles

Xu¹,

Chen²,

Wang³

et al. 2018

Proceedings of the 2018 International Workshop on Bioinformatics, Biochemistry, Biomedical Sciences (BBBS 2018)

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In this work, the effect of grafting of poly ethylenimine (PEI) on the antifouling performance of an aromatic polyamide forward osmosis membrane was investigated. Results showed that PEI modified membrane showed a good anti-contaminant property in treating wastewater containing cationic surfactant (DTAC). Furthermore, the silver nanoparticles were also introduced on the membrane surface to improve membrane anti-fouling resistance. The silver nanoparticles modified membranes showed excellent antibacterial properties.

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“…55 In water filtration systems, AgNPs act as a preventive measure to reduce the formation of biofilms on the surface or inside the pores of the membrane, thus making the membrane less susceptible to fouling. 56,57 However, when the AgNPs are deposited onto the membranes at high concentrations, they block the pores of the membranes, hence reducing the water fluxes. 58 MD membrane fouling studies in the literature are dominated by organic fouling and inorganic fouling (also referred to as scaling).…”

Section: The Use Of Nanoparticles In Membrane Modificationmentioning

confidence: 99%

A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

Nthunya

Gutierrez

Derese

et al. 2019

J of Chemical Tech & Biotech

121

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Membrane distillation (MD) is a thermally driven process that uses low‐grade energy to operate and has been extensively explored as an alternative cost‐effective and efficient water treatment process compared to conventional membrane processes. MD membranes are synthesized from hydrophobic polymers, e.g. polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or polypropylene (PP), using various methods including phase inversion and electrospinning techniques. Recent literature on MD membranes clearly shows their important role in surface water/wastewater treatment and seawater desalination. Modification of MD membranes with nanoscale materials significantly improves their performance, preventing wetting and fouling. This review presents a critical assessment of the progress on the use of nanomaterials for the modification of MD membranes. The techniques commonly used to synthesize MD membranes, the modifications that have been adopted for the incorporation of nanomaterials onto membranes, and the unique properties these nanomaterials impart on the membranes are discussed. The use of modified membranes in different MD configurations and their application in groundwater, surface water, wastewater, brackish water and seawater treatment is reviewed. Finally, cost implications, commercial viability, environmental sustainability, and future prospects of MD are also discussed to elucidate promising approaches for a future and successful implementation of MD at an industrial scale. © 2019 Society of Chemical Industry

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A green strategy to immobilize silver nanoparticles onto reverse osmosis membrane for enhanced anti-biofouling property

Cited by 146 publications

References 41 publications

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Tannic acid coating and in situ deposition of silver nanoparticles to improve the antifouling properties of an ultrafiltration membrane

Improving Anti-fouling Properties of Polyamide Forward Osmosis Membrane by grafting Poly ethylenimine and silver nanoparticles

A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

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