Mg-Fe layered double hydroxide modified montmorillonite as hydrophilic nanofiller in polysulfone- polyvinylpyrrolidone blend ultrafiltration membranes: separation of oil-water mixture

Makwana, Dipak; Polisetti, Veerababu; Castaño, Johanna; Ray, Paramita; Bajaj, Hari C.

doi:10.1016/j.clay.2020.105636

Cited by 46 publications

(10 citation statements)

References 48 publications

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“…Especially underwater to attain both properties being hydrophilic together with underwater superoleophobic. [107] The above listed and mentioned ensures a fouling-resistant membrane that can challenge cases of inseparable oil-water emulsions. [108] The development of such modified membranes [109] having super-hydrophilic with underwater superoleophobic surface depends on observations of living organisms in oil-sewage streams as clamshells that can easily clean themselves.…”

Section: Current Challenges For Membrane Application With Oil/water Emulsionmentioning

confidence: 99%

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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found with other insoluble matter, presenting relevant problems with safe and convenient separation. The legal discharge of oil-water emulsions is a complex process. [4] Thus, environmental authorities have established stringent regulations to cope with it. [5] Depending on countries, the oil limits are concentrations below 40 ppm as in Vietnam, [6] and in other countries like Korea, the maximum is only five ppm of oil in discharge. [7] Generally, the oil phase in water has three forms, based on oil droplets, size of more than 150 micrometers is called free oil, but that size found from 50 to 150 micrometers is the dispersed oil, [8] finally, the emulsified oil less than 20 µm. There is an increasing interest in employing membrane technology for filtering smaller size oil droplets. In this review, oil-water emulsion problems are highlighted with oil-water separation techniques selection and their performance with varied oil concentration and composition of other immiscible or miscible components. [9] Membrane technology is known formerly to economically advantageous for oily wastewater (OWW) treatment compared with other conventional technologies. [9] Based on the literature, the membranebased treatment cost estimation was about 1 and 3 $ m −3 , [10] lower than for dissolved air floatation (DAF) treatment (cost was 3.65 $ m −3 ). Generally, the treatment cost depends on OWW sources, as each industry has its specific blends for oil and grease jointly with other membrane foulants. [11] For example, oil-water emulsions treatment from the fatty acid industry has a total capital cost (costs of membranes, electricity, labor, cleaning, and maintenance) of 2.65 $ m −3 , compared with the railroad industry (it was ranged from 1.03 to 1.48 $ m −3 ). These costs for the metalworking OWW using UF were 2.8 $ m −3 . In microfiltration (MF) membrane, the OWW membrane-based treatment for oil concentration of 50 ppm annual cost was estimated as 0.098 $ m −3 with a feed rate of 100 m 3 day −1 . [9] The cost of membrane-based treatment of OWW is generally varying but is lower than conventional technologies. [12] 1.1. Oil-Water Emulsions Sources, Environmental Hazard, and Discharge Limits An oil-water emulsion is either a waste stream product, or secondary product. These effluents are generated from different areas and industrial sectors like the petroleum& gas sector, food processing, shipping facilities and maritime, and many others Oily wastewater is generated by various industries in extraordinary growing volumes, such as oil refineries, petrochemicals, metallurgical, food & beverages, and dairy industries, which need oil removal for safe discharge to the environment. Lower cost of production with high oil removal and efficient performance compared to classical methods for treating oil-water emulsions attributed to the alleviation of operation. That emphasizes membrane modification to enhance wettability, hydrophilicity with the antifouling property such as membranes dealing with tiny oil emulsions to be the key parameters to im...

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Section: Current Challenges For Membrane Application With Oil/water Emulsionmentioning

confidence: 99%

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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“…7b) occurred at two stages of thermal reduction from 200-500 o C and 500-700 o C, due to the degradation of the PS and PEG polymeric chains [59][60], whereas the weight loss (%) in the PS/PVP membrane (Fig. 7c) took place in the range of 200-510 o C due to the decomposition of the aromatic backbone of PS and PVP polymers [61].…”

Section: Thermal Gravimetric Analysismentioning

confidence: 99%

Assessment of green biodiesel production based on Egyptian waste cooking oil using different porous membranes

et al. 2021

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In this study, green biodiesel was produced from Egyptian waste cooking oil by trans-esterification reaction using membrane technology. The produced biodiesel was characterized by physicochemical properties, FTIR, and gas chromatography/mass spectrometry (GC/MS). It was found that it meets the specifications of the American standard test method (ASTM) D6751. Because glycerol was the only impurity that was difficult to separate from the prepared biodiesel by regular methods, polysulfone (PS) membrane and three hybrid membranes were prepared using the phase inversion method for the glycerol purification process. The hybrid membranes were prepared by mixing PS with different weight ratios of polyethylene glycol (PEG), polyvinyl pyrrolidone (PVP), and zinc oxide nanoparticles (ZnO NPs). The structure and surface morphology of the resulted membranes were characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), and thermal gravimetric analysis (TGA). The purification efficiency of these membranes was satisfied by highperformance liquid chromatography (HPLC) and weight loss ratio. The HPLC chromatogram showed that the membrane of the PS/ZnO NPs provided the highest separation rate of the biodiesel by-product glycerol compared to the other ones.

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“…Different methods were proposed to handle using membrane‐based process. Hydrophilic porous membranes due to underwater oleophobicity have been vastly used to treat oily feeds 15–18 . Also, treatment of surfactant‐containing feeds using the MD process is another issue as the pore wetting issue is likely to happen.…”

Section: Introductionmentioning

confidence: 99%

Mechanically improved superhydrophobic nanofibrous polystyrene/high‐impact polystyrene membranes for promising membrane distillation application

Niknejad

Bazgir

Kargari

2021

J of Applied Polymer Sci

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Robust membranes for commercial applications of membrane distillation (MD) are nearly the Achilles ankle of the process. Despite from high hydrophobicity requirements of the MD membranes, they must have enough mechanical and thermal stabilities. In this regard, flexible, superhydrophobic, and high‐productive nanofibrous membranes were fabricated using mixed dope solutions made of polystyrene (PS) and high‐impact PS (HIPS) through the electroblowing process. Although the PS nanofibers can be designed to have hierarchically rough surfaces to show superhydrophobicity, the inherent brittleness of this polymer still remains a big issue for practical application for a longer period of time. Upon adding HIPS into the PS‐containing dope solution, the rigid PS membrane turned into a more flexible one with improved elongation at break from 5.83% to 14.89%. Also, excellent direct contact membrane distillation performance was achieved using high saline (up to 150 g/L) and 0.1 mM sodium dodecyl sulfate/35 g/L NaCl feed solutions during 96 and 24 h, respectively. Superhydrophobicity (˃160°) and high LEP value (up to 173.2 kPa) gifted membranes with outstanding wetting resistance. Our proposed procedure can pave the route for the facile fabrication of robust MD membranes using cost‐effective materials and a high‐throughput fabrication process.

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Mg-Fe layered double hydroxide modified montmorillonite as hydrophilic nanofiller in polysulfone- polyvinylpyrrolidone blend ultrafiltration membranes: separation of oil-water mixture

Cited by 46 publications

References 48 publications

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Assessment of green biodiesel production based on Egyptian waste cooking oil using different porous membranes

Mechanically improved superhydrophobic nanofibrous polystyrene/high‐impact polystyrene membranes for promising membrane distillation application

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