The forward osmosis and desalination

Darwish, M.A.; Abdulrahim, Hassan K.; Hassan, Ashraf S.; Mabrouk, Abdelnasser; Sharif, Adel O.

doi:10.1080/19443994.2014.995140

Cited by 17 publications

(15 citation statements)

References 28 publications

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“…In this calculation, at least 100 capsules were counted at each glucose concentration. The minimum concentration necessary to induce the deformation of 50% of the microcapsules was defined as the critical glucose concentration and was used to determine the critical osmotic pressure based on the calibration curve available in the literature [22] . The modulus of elasticity of the polymer wall was calculated using Equation 3.…”

Section: Mechanical Resistance Of the Microcapsulesmentioning

confidence: 99%

Synthesis and characterization of microalgae fatty acids or Aloe vera oil microcapsules

et al. 2019

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It's proposed a single methodology for the encapsulation of Aloe vera oil or microalgae fatty acids using the complex coacervation process between gelatin and gum arabic. Although a very recurrent method, it is not trivial to establish a single coacervation methodology to encapsulate different compounds. The optimal synthesis conditions, that resulted in the best yield and encapsulation efficiency, are 1:1 (m/m) wall-to-core ratio, a temperature of 40°C and agitation speed of 10,000 rpm. Optical microscopy analysis revealed that the microcapsules are spherical, have average diameters of 112 μm (A. vera) and 118 μm (microalgae) and do not form agglomerates. The microcapsules were characterized by the osmotic pressure at which they ruptured, allowing the calculation of their mechanical resistance, which resulted in 392 MPa (A. vera) and 425 MPa (microalgae). The presented optimized methodology to encapsulate both compounds aims to contribute to their efficient and rational use, especially in cosmeceutical applications.

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Section: Mechanical Resistance Of the Microcapsulesmentioning

confidence: 99%

Synthesis and characterization of microalgae fatty acids or Aloe vera oil microcapsules

et al. 2019

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“…[1][2][3] Forward osmosis (FO) as an emerging membrane-based technology, exhibits potential in the production of fresh water from brackish and seawater as well as wastewater. [4][5][6][7] FO employs osmotic pressure differences between feed and draw solution to induce pure water flow across the membrane. 8 FO shows several advantages compared with the conventional pressure-driven membrane processes, such as, nanofiltration (NF) and reverse osmosis (RO) best exemplified by: (a) higher water recovery; (b) lower energy consumption; and (c) lower membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

“…Taking into consideration the increasing growth of population and the restriction of the world freshwater supplies, economical desalination of saline water, and wastewater reclamation have become progressively significant to supply clean water for different application 1–3 . Forward osmosis (FO) as an emerging membrane‐based technology, exhibits potential in the production of fresh water from brackish and seawater as well as wastewater 4–7 . FO employs osmotic pressure differences between feed and draw solution to induce pure water flow across the membrane 8 .…”

Section: Introductionmentioning

confidence: 99%

Feasibility of using polycarbonate as a substrate of thin film composite membrane in forward osmosis

Alihemati

Hashemifard

Matsuura

et al. 2021

J of Applied Polymer Sci

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In the present study, thin film composite (TFC) forward osmosis (FO) membranes with polycarbonate (PC (and polyether sulfone (PES) as substrates were fabricated to investigate the impact of the structural parameters of substrate on the performance of the membranes. Firstly, the substrates were prepared by Loeb‐Sourirajan method. Characterization techniques including FESEM, contact angle measurement, pure water flux, gas permeability test, and tensile test were applied to investigate the properties of the substrates. After preparing suitable substrates, active layers were fabricated via interfacial polymerization (IP) technique. The performance and characterization test showed that PC is a relatively hydrophilic polymer with a good property for using as a substrate of FO TFC membrane but as the result of gas permeability test show, this membrane has large surface pore size in comparison with PES membrane. Mean pore size of PC and PES membrane is 378 and 139 nm, respectively. Also, the results show that the effective surface porosity of PC (285, 1/m) is more than PES (213, 1/m) substrate.

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“…Recently, the desalinated water produced by RO has surpassed that from thermal processes (MSF and MED), with regard to their lower operating and investment costs 3. However, desalination using RO is still considered as an energy‐intensive process because of the high hydraulic pressure needed to overcome the osmotic pressure of seawater 4. Other disadvantages of the RO process include the membrane being sensitive to scaling and fouling which requires intensive pretreatment steps, the relatively limited water recovery, and the low removal of uncharged contaminants with low molecular weight 5.…”

Section: Introductionmentioning

confidence: 99%

Energetic Performance and Permeate Flux Investigation of Direct‐Contact Membrane Distillation for Seawater Desalination

Boubakri

Elgharbi

Bouguecha³

et al. 2020

Chem Eng & Technol

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The performance of the direct-contact membrane distillation (DCMD) process in desalting Mediterranean seawater was investigated. Theoretical and experimental optimization of various operating parameters was conducted. The effects of temperature differences, feed velocity, and membrane characteristics were studied. When using commercial polyvinylidene fluoride membranes, the vapor transfer throughout the membrane pores is dominated by the Knudsen-molecular diffusion model. Maximum permeate flux was obtained when increasing temperature, feed velocity, membrane pore size, and porosity and decreasing membrane tortuosity and thickness. Thermal efficiency, gained output ratio, and specific thermal energy consumption were improved when increasing feed temperature. By application of the DCMD process to Mediterranean seawater, a high water quality was obtained.

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The forward osmosis and desalination

Cited by 17 publications

References 28 publications

Synthesis and characterization of microalgae fatty acids or Aloe vera oil microcapsules

Synthesis and characterization of microalgae fatty acids or Aloe vera oil microcapsules

Feasibility of using polycarbonate as a substrate of thin film composite membrane in forward osmosis

Energetic Performance and Permeate Flux Investigation of Direct‐Contact Membrane Distillation for Seawater Desalination

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