Treatment of wastewater containing oil using phosphorylated silica nanotubes (PSNTs)/polyvinylidene fluoride (PVDF) composite membrane

Zhang, Simeng; Wang, Rongshu; Zhang, Shaofeng; Li, Guoling; Zhang, Yuqing

doi:10.1016/j.desal.2013.11.008

Cited by 44 publications

(15 citation statements)

References 28 publications

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“…[12]. So far, many materials such as zeolites, αand γalumina (Al 2 O 3 ), titania (TiO 2 ), zirconia (ZrO 2 ), silicon oxide (SiO 2 ), and microporous glasses are commonly used in the development of ceramic membranes [13,14]. To date, various methods have been used to prepare inorganic ceramic membranes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Zirconia-Based Ceramic Membrane and Its Application for Drinking Water Treatment

et al. 2020

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This work concerns the preparation of a mineral membrane by the slip casting method based on zirconium oxide (ZrO2) and kaolin. The membrane support is produced from a mixture of clay (kaolin) and calcium carbonate (calcite) powders using heat treatment (sintering). Membrane and support characterization were performed by Scanning Electron Microscopy (SEM), X-ray Fluorescence (XRF), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Raman Spectroscopy. The prepared mineral membrane was tested to treat drinking water obtained from different zones of the El Athmania (Algeria) water station (raw, coagulated, decanted, and bio filtered water). Experimental parameters such as permeate flux, turbidity, and total coliforms were monitored. The results showed that the mineral membrane was mainly composed of SiO2 and Al2O3 and the outer surface, which represented the membrane support, was much more porous than the inner surface where the membrane was deposited. The permeate flux of the raw water decreased with filtration time, due to a rejection of the organic matters contained in the raw water. Moreover, the absence of total coliforms in the filtrate and the increase in concentration in the concentrate indicate that the prepared mineral membrane can be used for drinking water treatment.

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Section: Introductionmentioning

confidence: 99%

Preparation of a Zirconia-Based Ceramic Membrane and Its Application for Drinking Water Treatment

et al. 2020

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“…PVDF membranes have been considered as one of the more popular membrane materials widely applied in the membrane separation processes because of their high mechanical strength, thermal stability and excellent resistance to corrosion from many chemicals and organic solvents 18 19 20 . Nevertheless, the high hydrophobicity and low surface energy of PVDF membranes has become a great drawback for their applications in some separation and purification processes of water and wastewater 19 20 21 22 23 24 . Therefore, it is very significant to improve the hydrophilicity of PVDF membranes through versatile methods mainly including surface modification and blending modification 19 20 .…”

mentioning

confidence: 99%

“…Therefore, it is very significant to improve the hydrophilicity of PVDF membranes through versatile methods mainly including surface modification and blending modification 19 20 . Surface modification is achieved by coating or grafting a functional layer on the prepared membrane surface, but not the pores inside the membrane 21 22 , which is different from the blending modification based on a single step 23 24 25 . Since the surfaces and the inside-pores of PVDF membranes can provide a window of opportunity to be modified 19 20 and those hybrid mesoporous membranes prepared by using dual-templated synthesis method can introduce desirable properties into the original hydrophilic membranes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 , it is necessary to further explore the fabrication of hybrid mesoporous membranes by employing hydrophobic porous membranes as the hard templates.…”

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confidence: 99%

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Wang

Yang

Jin

et al. 2016

Sci Rep

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The high hydrophobicity of poly(vinylidene fluoride) (PVDF) membrane remains an obstacle to be applied in some purification processes of water or wastewater. Herein, a highly hydrophilic hybrid mesoporous titania membrane composed of mesoporous anatase titania (meso-TiO2) materials inside the three-dimensional (3D) macropores of PVDF membrane was successfully prepared by using the dual-templated synthesis method combined with solvent extraction and applied as the photocatalytic membrane reactor for the photodegredation of organic dye in water. The structure and the properties of as-prepared hybrid membranes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption–desorption and contact angle measurements. It was found that the hydrophilicity of PVDF membrane can be significantly improved by filling mesoporous TiO2 inside the 3D macropores of PVDF membrane. Moreover, such a PVDF/meso-TiO2 hybrid membrane exhibits promising photocatalytic degradation of dye in water due to the existence of mesoporous anatase TiO2 materials inside PVDF membrane. This study provides a new strategy to simultaneously introduce hydrophilicity and some desirable properties into PVDF and other hydrophobic membranes.

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“…al [13] and Zhang et. al [14] has not been conducted. A better understanding of the individual effects of PVP addition and dope sonication may result in the advancement of MMM design and optimization, benefitting commercial water treatment practice.…”

Section: Introductionmentioning

confidence: 99%

Effects of dope sonication and hydrophilic polymer addition on the properties of low pressure PVDF mixed matrix membranes

Ike

Dumée

Groth

et al. 2017

Journal of Membrane Science

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Mixed matrix membranes (MMM) made from hydrophilic fillers incorporated into poly (vinylidene fluoride) (PVDF) are well known to have improved membrane properties and durability. However, the contributions from two key steps in MMM fabrication: dope sonication and the addition of a hydrophilic polymer like poly (vinylpyrrolidone) (PVP), have not been sufficiently highlighted. In this work, a range of MMM were made by extended dope sonication and stepwise PVP addition. The results showed that PVP, popularly referred to as a 'pore former', was surprisingly not responsible for pore formation but functioned rather as a 'pore connector' and as an aid to particle dispersion. While dope sonication resulted in efficient particle dispersion as may be expected, it did not improve membrane surface wettability as the hydrophilic nanoparticles were completely locked within the hydrophobic PVDF matrix. Sonication resulted in significant reduction in membrane porosity but did not change the membrane thermal stability. The addition of PVP, however, significantly reduced thermal stability as well as the PVDF β-phase mass fraction. The results of this study provide valuable insights to the effects of dope sonication and PVP addition for manufacturers and researchers developing low pressure membranes for water treatment applications.

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Treatment of wastewater containing oil using phosphorylated silica nanotubes (PSNTs)/polyvinylidene fluoride (PVDF) composite membrane

Cited by 44 publications

References 28 publications

Preparation of a Zirconia-Based Ceramic Membrane and Its Application for Drinking Water Treatment

Preparation of a Zirconia-Based Ceramic Membrane and Its Application for Drinking Water Treatment

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Effects of dope sonication and hydrophilic polymer addition on the properties of low pressure PVDF mixed matrix membranes

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