Development of underwater superoleophobic polyamide-imide (PAI) microfiltration membranes for oil/water emulsion separation

Helali, Nusrat; Rastgar, Masoud; Ismail, Farhad; Sadrzadeh, Mohtada

doi:10.1016/j.seppur.2019.116451

Cited by 53 publications

(19 citation statements)

References 70 publications

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“…The magnified spectra, presented in Fig. 4 b, clearly show that the intensity of these peaks enhanced as the number of bilayers increased from 1 to 4, indicating the successful LbL-coating of the PAI substrate 38 .…”

Section: Resultsmentioning

confidence: 88%

“…In contrast, for the modified membranes, the permeate flux decline reached a steady condition. The initial sharp decline can be attributed to the partial pore blockage with the foulants, primarily organic matter 38 . The BFW mainly consists of high concentrations of organic matter and dissolved inorganic materials 54 , 55 .…”

Section: Resultsmentioning

confidence: 99%

“…A weighing balance (EL4001, Mettler Toledo, USA) was also used to record the mass of permeate at a regular time interval. The pure water flux ( J w ) is calculated using the equation below 38 : where m (kg) is the mass of permeate, A (m) is the effective filtration area, ρ (kg m −3 ) is water density, and Δt (h) is the time difference between each record. A series of filtration tests with distilled water was performed at different TMP, and the hydrodynamic permeability (A) was defined as the slope of the flux-TMP plot.…”

Section: Methodsmentioning

confidence: 99%

“…Permeate was collected, and the rejection of organic compounds was measured using a UV–Vis spectrophotometer (Thermo Fisher Scientific GENESYS™ 10) at a wavelength of 290 nm. The rejection percentage (R%) of the organic matters, percentage of flux decline (FD), and flux recovery ratio (FRR) are calculated using the following equations 15 , 38 : where C permeate and C Feed are the organic matter concentration in the permeate and feed solutions, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Development of layer-by-layer assembled polyamide-imide membranes for oil sands produced water treatment

Helali

Shamaei

Rastgar

et al. 2021

Sci Rep

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The sustainable expansion of steam-assisted gravity drainage, as one of the most popular enhanced oil recovery methods, strongly depends on the proper management of the produced water. The strict environmental regulations have forced the oil sands industry to treat and reuse the produced water for oil extraction. Membrane separation as a single-step water treatment technique has played an important role in removing multiple-sized contaminants from wastewater. However, fouling limits the widespread application of this technology if the membrane is not modified properly to achieve antifouling propensities. Herein, we used the layer-by-layer assembly technique to sequentially coat the hydrophilic poly(diallyl dimethylammonium chloride) and polyacrylic acid on the surface of the polyamide-imide porous membrane to improve its fouling resistance. The effect of the number of bilayers on fouling and permeation properties was examined. The membrane with the highest fouling resistance and reasonable hydrodynamic permeability of 5.2 LMH/psi was achieved by coating four bilayers. This membrane exhibited a low flux decline of 50.2% and a high flux recovery ratio of 100%, while these numbers for the pristine PAI membrane were 75.9% and 97.8% under similar test conditions. The enhanced antifouling characteristics of the modified membranes indicate the viability of these membranes for oil sands produced water treatment with an easy cleaning procedure. The key parameter that contributed to the enhanced fouling resistance of the bilayer-coated membranes was the improved surface hydrophilicity, which manifests through the reduction of water contact angle from 62° ± 3° for the pristine membrane to 52° ± 2° for surface-modified membranes.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Development of layer-by-layer assembled polyamide-imide membranes for oil sands produced water treatment

Helali

Shamaei

Rastgar

et al. 2021

Sci Rep

Self Cite

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“…Simultaneously applied photocatalysis and filtration have some technical problems that need to be studied in detail, such as the distance between the light source and the membrane, the wavelength of the used light, and the optimal treatment time for the efficient decomposition of organic matter before its filtration 202–205 Both membrane hydrophilicity and membrane oleophobicity have to be studied in depth in order to (a) prevent the permeation of oil droplets, (b) selectively separate water from the oil‐water mixtures, and (c) minimize the adhesion of the oil droplets 133,208 Most of the studies investigated photocatalysis followed by membrane filtration 173,197 or membrane filtration followed by photocatalytic cleaning 106,155,191,198–200,206,207 .…”

Section: Discussionmentioning

confidence: 99%

Photocatalytic membrane filtration and its advantages over conventional approaches in the treatment of oily wastewater: A review

Santos

László

Hodúr

et al. 2020

Asia-Pacific J Chem Eng

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Clean water supply has become one of the biggest challenges of the 21st century; therefore, water source protection is of increasing importance. Beyond environmental protection reasons, economic concerns-derived from increasing costs of processing water and wastewater discharge-also prompt industries to use advanced wastewater treatment methods, which ensure higher purification efficiency or even the recycling of water. Therefore, highly effective treatment of oily wastewaters has become an urgent necessity because they are produced in high quantities and have harmful effects on both the environment and human population. However, high purification efficiency can be difficult to achieve, because some compounds are hard to eliminate. Conventional methods are effective for the removal of floating and dispersed oil, but for finely dispersed, emulsified and dissolved oil advanced methods must be used, such as membrane filtration which exhibits several advantages. The application of this technology is restricted by fouling-the major limiting factor-which jeopardizes the membrane performance. In order to reduce fouling, in-depth research is being conducted to make the treatment of oilcontaminated water technically and economically feasible. The present work aims to review the conventional oil separation methods with their limitations and to focus on membrane filtration, which ensures significantly higher purification efficiencies, including the main problem: the flux reduction caused by fouling. This paper also discusses promising solutions, such as membrane modification methods, mostly with hydrophilic and/or photocatalytic nanoparticles and nanocomposites, overviewing the efforts that are being made to develop feasible technologies to treat oil-contaminated waters.

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Advances in Membrane Technology Used in the Wastewater Treatment Process

Sethy¹,

Arif²,

Sista³

et al. 2021

Pollutants and Water Management

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Development of underwater superoleophobic polyamide-imide (PAI) microfiltration membranes for oil/water emulsion separation

Cited by 53 publications

References 70 publications

Development of layer-by-layer assembled polyamide-imide membranes for oil sands produced water treatment

Development of layer-by-layer assembled polyamide-imide membranes for oil sands produced water treatment

Photocatalytic membrane filtration and its advantages over conventional approaches in the treatment of oily wastewater: A review

Advances in Membrane Technology Used in the Wastewater Treatment Process

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