Immobilized graphene oxide-based membranes for improved pore wetting resistance in membrane distillation

Alberto, Monica; Skuse, Clara; Tamaddondar, Marzieh; Gorgojo, Patricia

doi:10.1016/j.desal.2022.115898

Cited by 20 publications

(3 citation statements)

References 44 publications

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“…GO membranes can be fabricated by methods like vacuum filtration or layer-by-layer assembly. They demonstrate high oil rejection efficiency and can be regenerated for repeated use [62][63][64]. Numerous graphenes and their derivative-based polymeric membranes have been used for oil-water separation.…”

Section: Graphene and Its Derivativementioning

confidence: 99%

Two-Dimensional Nanomaterial (2D-NMs)-Based Polymeric Composite for Oil–Water Separation: Strategies to Improve Oil–Water Separation

et al. 2023

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Oil leakage and organic solvent industrial accidents harm the ecosystem, especially aquatic and marine life. Oil–water separation is required to combat this issue, which substantially enhances the ecosystem and recovery of oils from water bodies. In this aspect, significant efforts have been made by scientists to develop newer composite materials that efficiently separate oils from water bodies with exceptional recyclability. Membrane filtration is an efficient option for oil–water separation due to its ability to separate oil from water without involving any chemicals. However, relatively less water permeability and a high degree of surface fouling limit their applicability. The advent of two-dimensional nanomaterials (2D-NMs) gives newer insight in developing membranes due to their exceptional characteristics like hydrophobicity/hydrophilicity, selectivity, antifouling ability, flexibility, and stability. Incorporating 2D-NMs within the polymeric membranes makes them exceptional candidates for removing oil from water. Moreover, 2D-NMs offer rapid sorption/desorption rates and boost water transportation. Additionally, 2D-NMs provide roughness that significantly enhances the fouling resistance in the polymeric membrane. This review focuses on properties of 2D-NM-based polymeric membrane and their roles in oil–water separation. We also discussed strategies to improve the oil–water separation efficiency. Finally, we discussed oil–water separation’s outlook and prospects using 2D-NM-based polymeric membranes. This review might provide new insight to the researchers who work on oil–water separation.

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Section: Graphene and Its Derivativementioning

confidence: 99%

Two-Dimensional Nanomaterial (2D-NMs)-Based Polymeric Composite for Oil–Water Separation: Strategies to Improve Oil–Water Separation

et al. 2023

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“…Tian et al [42] used bottom-up strategy to fabricate the PVDF membrane and the resultant membranes possessed high water contact angels (~144°) with rougher surfaces. Alberto et al [43] coated the PVDF membranes with graphene oxide laminate and showed that the membranes were stable for at least 90 h with the feed solutions containing surfactants. Zou et al [44] employed co-casting technique to fabricate the PVDF membranes and found the excellent rejections of brine with sodium dodecyl sulfate (SDS) surfactant and ginseng extracts were 99.9% for 120 h operation.…”

Section: Phase Inversion Membranesmentioning

confidence: 99%

Evolution of Membrane Surface Properties for Membrane Distillation: A Mini Review

Chiam

Sarbatly²

2022

AMST

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To date, the membrane development for membrane distillation (MD) application is growing in line with the increasing volume of various types of wastewaters discharged into environment. MD is a liquid-vapor separation process and a hydrophobic membrane is used to retain the liquid. Theoretically, the hydrophobic membrane can achieve 100% rejection of non-volatile components that dissolved in feed liquids. As a result, MD has received significant attention in water recovery from saline water as well as wastewaters. Nevertheless, in addition to the scaling problem due to salts, the hydrophobicity property of membrane becomes a concern when dealing with challenging wastewaters which contain various types of low surface tension components such as oils, grease, alcohols, organics and surfactants. The membrane pore wetting due to salts deposition fouling and low surface tension components subsequently reduces the flux and even fails the liquid-vapor separation process. This article briefly discusses the transformation of MD membrane from hydrophobic to superhydrophobic and omniphobic which purposely to enhance the flux and eliminate the membrane pore wetting.

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“…Membrane distillation (MD) is an effective separation method for removing organic solvents from aqueous media. , In MD, a porous hydrophobic membrane selectively transport vapor molecules through the pores while repelling the liquid phase. − MD offers several advantages in solvent recovery over classical distillation, including lower operating temperatures (well below the boiling point) and lower capital investment. − Furthermore, the heat required in MD can be obtained from alternative energy sources such as solar energy or microwave to make it more energy-efficient. MD can be easily integrated with other membrane processes including ultrafiltration, pervaporation (PV), and RO. − …”

Section: Introductionmentioning

confidence: 99%

Selective Recovery of Ethyl Acetate by Air-Sparged Membrane Distillation Using Carbon Nanotube-Immobilized Membranes and Process Optimization via a Response Surface Approach

Bhoumick

Paul

Roy

et al. 2023

Ind. Eng. Chem. Res.

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Ethyl acetate (EA) is an extensively used industrial solvent, and typically, aqueous mixtures containing EA are discarded as hazardous waste. The recovery of EA from wastewater streams would have significant environmental benefits and be a circular economy approach to solvent recycling. However, with a relatively high water solubility (8.3% w/v at room temperature), it remains a challenge. In this paper, we report the recovery of EA from water using air-sparged sweep gas membrane distillation (AS-SGMD) with carbon nanotube-immobilized membranes. A central composite rotatable design was used to study the effect of process parameters on flux and selectivity via conventional SGMD and AS-SGMD. The experiments were run at different operating conditions of temperature, concentration, and flow rate. The flux reached as high as 1.41 kg/m2 h–1, and selectivity as high as 10.8 was obtained. The introduction of air sparging improved the flux by as much as 12% and the selectivity by 17%. The response surfaces of flux and selectivity as a function of operating variables were studied, and regression models were developed. For both regular SGMD and AS-SGMD, the selectivity of EA recovery followed a quadratic model, while the flux showed a linear response. The predicted and experimental responses were in agreement with a R 2 value of 0.94. The optimization efforts showed that relatively low temperatures, higher concentrations, and high flow rates favored higher selectivity.

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Immobilized graphene oxide-based membranes for improved pore wetting resistance in membrane distillation

Cited by 20 publications

References 44 publications

Two-Dimensional Nanomaterial (2D-NMs)-Based Polymeric Composite for Oil–Water Separation: Strategies to Improve Oil–Water Separation

Two-Dimensional Nanomaterial (2D-NMs)-Based Polymeric Composite for Oil–Water Separation: Strategies to Improve Oil–Water Separation

Evolution of Membrane Surface Properties for Membrane Distillation: A Mini Review

Selective Recovery of Ethyl Acetate by Air-Sparged Membrane Distillation Using Carbon Nanotube-Immobilized Membranes and Process Optimization via a Response Surface Approach

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