Preparation of reduced graphene oxide-carbon nanotubes membranes for conductive heating membrane distillation treatment of humic acid

Han, Fei; Mao, Jiayue; Liu, Shuxun

doi:10.1016/j.seppur.2022.122181

Cited by 11 publications

(6 citation statements)

References 62 publications

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“…MD has been extensively used in the desalination of sea and brackish water where a high water vapor flux is desired, while in solvent recovery, solvent flux and selectivity are important. − During solvent concentration, the solvent and the water flux are related to the overall selectivity, and the goal is to maximize the solvent flux and selectivity. ,− Several factors, such as membrane selection and process parameters, which impact flux and selectivity are important. ,, For example, the effects of temperature, concentration, and flow rate may need to be optimized to optimize selectivity. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Air-sparged MD (ASMD) is a recently developed MD approach where air is sparged during MD to enhance the volatilization of the organic solvents from its aqueous solution. This technique has shown a high flux and reduced fouling during desalination. , Several studies have reported air sparging in various membrane configurations to enhance flux, increase the permeation cycle, and modify selectivity. − …”

Section: Introductionmentioning

confidence: 99%

“…2,21−25 Several factors, such as membrane selection and process parameters, which impact flux and selectivity are important. 13,26,27 For example, the effects of temperature, concentration, and flow rate may need to be optimized to optimize selectivity. 2,28,29 Ethyl acetate (EA) is extensively used in the petrochemical, paint, adhesive, cosmetic, and fine chemical industries as well as in the decaffeination process.…”

Section: Introductionmentioning

confidence: 99%

“…This technique has shown a high flux and reduced fouling during desalination. 25,26 Several studies have reported air sparging in various membrane configurations to enhance flux, increase the permeation cycle, and modify selectivity. 27−29 Carbon nanotube immobilization on the membrane surface has shown significant enhancement in the solvent flux and selectivity by preferential sorption−desorption on the CNT surface.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…The preparation of graphene structures [ 18 , 19 , 20 ] opens new ways for the improvement of functional properties in materials which are related to the penetration or retention of particles according with the application requirements: oil adsorption [ 21 ], humidity and temperature sensors [ 22 ], material crosslinking [ 23 ], and so on. The majority of applications concern the capacity of graphene structures for the scavenging molecules or their fragments in the free interlayer space.…”

Section: Introductionmentioning

confidence: 99%

Packaging Materials Based on Styrene-Isoprene-Styrene Triblock Copolymer Modified with Graphene

Zaharescu¹,

Banciu²

2023

Polymers

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This study presents the improved stabilization effects of graphene on a polymer substrate, namely a styrene-isoprene-styrene triblock copolymer (SIS) which creates opportunities for long-term applications and radiation processing. The added graphene has a remarkable activity on the protection of polymer against their oxidation due to the penetration of free macroradical fragments into the free interlayer space. The chemiluminescence procedure used for the evaluation of the progress of oxidation reveals the delaying effect of oxidative degradation by the doubling extension of oxidation induction time, when the material formulation containing graphene is oxidized at 130 °C. The pristine polymer that is thermally aged requires an activation energy of 142 kJ mol−1, while the modified material needs 148, 158 and 169 kJ mol−1, for the oxidative degradation in the presence of 1, 2 and, respectively, 3 wt% of graphene. The contribution of graphene content (1 wt%) on the stability improvement of SIS is demonstrated by the increase of onset oxidation temperature from 190 °C for neat polymer to 196 °C in the presence of graphene and to 205 °C for the polymer stabilized with graphene and rosemary extract. The addition of graphene into the polymer formulations is a successful method for enlarging durability instead of the modification of receipt with synthesis antioxidants. The presumable applications of these studied materials cover the areas of medical wear, food packaging, commodities, sealing gaskets and others that may also be included through the products for nuclear power plants.

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Graphene oxide-based nanohybrids incorporated in nanofiltration and reverse osmosis membranes for desalination and dye separation: a review

Santos,

de Souza

2024

Front. Mater. Sci.

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Preparation of reduced graphene oxide-carbon nanotubes membranes for conductive heating membrane distillation treatment of humic acid

Cited by 11 publications

References 62 publications

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

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

Packaging Materials Based on Styrene-Isoprene-Styrene Triblock Copolymer Modified with Graphene

Graphene oxide-based nanohybrids incorporated in nanofiltration and reverse osmosis membranes for desalination and dye separation: a review

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