Nanoclay embedded mixed matrix PVDF nanocomposite membrane: Preparation, characterization and biofouling resistance

Rajabi, Hamid; Ghaemi, Negin; Madaeni, S.S.; Daraei, Parisa; Khadivi, Mohammad Ali; Falsafi, Monireh

doi:10.1016/j.apsusc.2014.05.185

Cited by 57 publications

(29 citation statements)

References 27 publications

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“…However, on impregnating laterite (mean diameter over volume or de Brouckere mean diameter: 48 μm) within the matrix, the voids tend to reduce in size. 31 The surface of membrane M0 (pure polymeric) is almost free of any considerable features, although the size of surface features starts increasing from membrane M10 and a distribution of roughness pattern is observed along the surfaces of membranes M15 and M20. This results in delayed solvent (DMF)nonsolvent (water) demixing, retarding the phase separation kinetics and leading to the formation of smaller sized macrovoids along the cross section of the membrane.…”

Section: Membrane Morphologymentioning

confidence: 97%

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

Chatterjee

2015

Environ. Sci.: Water Res. Technol.

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A flat sheet mixed matrix membrane, made of polyacrylonitrile (PAN) copolymer, impregnated with laterite, was fabricated for the removal of arsenic from water. The permeability and molecular weight cut-off of the selected membrane were 3.4 × 10 −11 m s −1 Pa and 48 kDa, respectively. Morphological analysis showed macrovoids constricted by laterite particles. Surface characteristics assessed by atomic force microscopy revealed the increase in roughness with laterite concentration. The presence of different forms of iron oxide (laterite) and nitrile groups (polyacrylonitrile) in membrane M25 was confirmed by X-ray diffraction.Incorporation of arsenic within the membrane matrix was demonstrated by subsequent lowering of transmittance peaks at different wavelengths of FTIR. Maximum adsorption capacity of the selected membrane was 1.4 mg g −1 at 298 K. Under the optimum operating conditions, the pristine mixed matrix membrane resulted in a filtrate with a concentration below 10 μg l −1 for 17 hours in cross flow mode with a 0.01 m 2 filtration area. The stability of the membrane was demonstrated for three regeneration cycles. The effect of pH and coexisting anions like phosphate, sulphate, carbonate and bicarbonate on the removal efficiency of arsenic was studied. The performance of the membrane in the presence of arsenic-contaminated groundwater was also tested.Environ. Sci.: Water Res. Technol. This journal is A novel, high flux PAN-laterite mixed matrix membrane was prepared, characterized in detail and applied for the removal of arsenic from groundwater. The membrane was in ultrafiltration range with high hydrophilicity. The membrane showed high throughput and, at the same time, high rejection of arsenic. The filtration experiments were conducted using 100 ppb arsenic feed solution as well as real groundwater from the affected area. Permeate flux using contaminated groundwater was as high as 225 l m −2 h −1 with a filtrate concentration less than 10 μg l −1 (WHO limit). The breakthrough time of producing safe drinking water was 17 hours for a virgin membrane (0.01 m 2 filtration area) and this time can be enhanced significantly for a scaled-up filter with a high filtration area.

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Section: Membrane Morphologymentioning

confidence: 97%

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

Chatterjee

2015

Environ. Sci.: Water Res. Technol.

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“…Compared to having just a positively or negatively charged membrane surface, the addition of a zwitterionic charged material, one composed of neutral molecules that have a positive and a negative electrical charge, has been shown to confer better anti-fouling properties [173]. Inorganic nanoparticles (such as SiO 2 [174,175], Al 2 O 3 [176,177], clay [178,179], ZrO 2 [180][181][182], TiO 2 [183,184], and ZnO [185,186]) also have been used to improve polymeric composite membranes, conferring improvements in the mechanical properties, thermal stability, hydrophilicity, permeation, and antifouling performance of membranes [165].…”

Section: Membrane Materials and Surface Morphologymentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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“…However, PVDF membrane has a highly hydrophobic nature which leads to the deposition of solute or particle on a membrane surface or in membrane pores, causing serious fouling and a rapid decline in permeation flux [2]. The hydrophobicity of PVDF membrane has limited the application of the commercial PVDF membrane.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization and Performance of Polyvinylidene Fluoride/Tetraoctyl Phosphonium Bromide Nanocomposite Ultrafiltration Membrane

Ali¹,

Yu²,

Sani³

et al. 2018

MJAS

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Nanoclay embedded mixed matrix PVDF nanocomposite membrane: Preparation, characterization and biofouling resistance

Cited by 57 publications

References 27 publications

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Preparation, Characterization and Performance of Polyvinylidene Fluoride/Tetraoctyl Phosphonium Bromide Nanocomposite Ultrafiltration Membrane

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