Assessment of a Thermally Modified Cellulose Acetate Forward‐Osmosis Membrane Using Response Surface Methodology

Zyaie, Javad; Sheikhi, Mohammad Hossein; Baniasadi, Javad; Sahebi, Soleyman; Mohammadi, Toraj

doi:10.1002/ceat.201800084

Cited by 33 publications

(20 citation statements)

References 57 publications

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“…J s is the reverse salt flux (g m -2 h -1 ), ΔC t denotes the concentration difference of CaCl 2 between initial and final FS (g L -1 ), and m f is the permeated water weight (kg). It should be noted that for calculating the concentration of CaCl 2 permeating to the FS, the conductivity of the feed solution was measured by electrical conductivity (LEYBOLD 666222, Germany) and converted to salt concentration via calibration curve [31].…”

Section: Methodsmentioning

confidence: 99%

Optimization of the Forward Osmosis Process Using Aquaporin Membranes in Chromium Removal

et al. 2019

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Due to the lack of affordable and feasible wastewater treatment technologies, various industries in developing countries are discharging chromium (Cr) without meeting the environmental standards. Here, the aim was to employ forward osmosis (FO) using aquaporins (AQP)-based biomimetic membranes and optimize the Cr rejection through response surface methodology (RSM). The initial concentration of draw solution, feed solution, and time was selected as independent variables in order to optimize Cr rejection and water flux. A high Cr rejection efficiency and water flux were achieved under the optimal conditions. These results revealed that the FO process applying an AQP membrane beside the RSM could be considered to treat wastewaters containing heavy metals.

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Section: Methodsmentioning

confidence: 99%

Optimization of the Forward Osmosis Process Using Aquaporin Membranes in Chromium Removal

et al. 2019

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“…[23][24] It has been widely used to develop reverse osmosis (RO), 25 nanofiltration (NF), 26 ultrafiltration (UF) 27 and microfiltration (MF) [28][29] membranes by the standard phase reversal method and has been the subject of several studies. 30 The disadvantage of cellulose acetate membranes is that they are sensitive to chemical agents (high pH, temperature, oxidants) and have low mechanical strength. Polysulfone PSf is a widely used membrane material due to its many advantages, its chemical and mechanical resistance, and its application in a wide pH range of pH2-12.…”

Section: A Review On Ca/psf Membranes For Water Treatmentmentioning

confidence: 99%

“…The performance of the cellulose acetate (CA) membrane annealed in a bath at 80 °C for 15 min was evaluated by Zyaie et al, 30 using a reverse osmosis (RO) set-up. The best results were obtained for the membrane prepared under the influence of an annealing treatment with a concentration of 20% CA at a coagulation bath temperature (CBT) of 23 °C.…”

Section: A Review On Ca/psf Membranes For Water Treatmentmentioning

confidence: 99%

“…After evaporation for 30 seconds, the films were immersed in a coagulation bath at 4 °C, then annealed in an oven at 75 °C for 30 seconds. 30,44 All the membranes were stored in distilled water.…”

Section: Polymer Blend Preparationmentioning

confidence: 99%

“…In addition, this causes a decrease in the free volume formed in the membrane, following the heat treatment, thereby causing the narrowing of the pores and, consequently, a more dense morphology. 30,44 The images (a) show that membrane C, containing a low concentration of CA (63%-70%) and a high PSf/PEG ratio, has in the intermediate layer finger-like macrovoids and a porous spongelike structure. It is attributed to the domination of instantaneous and delayed demixing, respectively.…”

Section: Sem Analysismentioning

confidence: 99%

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Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Aburideh¹,

Merzouk²,

Naceur³

et al. 2019

Cellulose Chem. Technol.

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The performance of a membrane is a key factor in predicting its reliability. Designing membranes depends on their morphological and molecular characteristics for specific applications. This work focuses on improving the behavior of a cellulose acetate-polysulfone PSf-CA membrane in the presence of PEG 400 additive, in different concentrations, using thermal annealing on the surface of the membrane. The membrane was prepared by the NIPS phase inversion process; the surfaces of the obtained membrane films were subjected to thermal annealing at 75 °C for 15 seconds. The influence of the composition of the polymer mixture, the concentration of the additive and the annealing effect on the performance of the membranes were studied. The membranes were characterized in terms of contact angle and mechanical resistance, as well as by FTIR, DSC, ATG and SEM. Measurements of the contact angle confirmed the hydrophilic character, which increased with a rising level of PEG in the casting solution. The results showed that the permeation flux increased for the highest PSf/PEG ratio. SEM results suggested that the annealing treatment improved the surface of the membrane; the surface layers became denser and smoother, with a porous intermediate layer, as CA concentrations rose in the mixture. The fluoride reject was evaluated for all the membranes, the obtained fluoride retention rates were very satisfactory and met the standards required by WHO.

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Thin‐Film Composite Forward‐Osmosis Membranes Reinforced on Woven Mesh and Nonwoven Backing Fabric Supports

et al. 2021

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Thin‐film composite (TFC) forward‐osmosis (FO) membranes were developed on different woven and nonwoven backing fabrics as support. Embedded backing fabrics have a significant effect on the membrane film sublayer by imparting porosity, membrane mechanical strength, and thickness. Woven and nonwoven backing fabric supports have been used for FO membranes cast on the commercial scale. There are also a few studies on the laboratory scale, but repeating them seems to be a challenge. The results herein show that TFC membranes with nonwoven incorporated substrates gain a higher water flux while keeping the specific reverse salt flux low.

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Assessment of a Thermally Modified Cellulose Acetate Forward‐Osmosis Membrane Using Response Surface Methodology

Cited by 33 publications

References 57 publications

Optimization of the Forward Osmosis Process Using Aquaporin Membranes in Chromium Removal

Optimization of the Forward Osmosis Process Using Aquaporin Membranes in Chromium Removal

Thermal Annealing Effect on Morphology and Performance of Polysulfone-Cellulose Acetate Membranes: Application for Water Defluoridation

Thin‐Film Composite Forward‐Osmosis Membranes Reinforced on Woven Mesh and Nonwoven Backing Fabric Supports

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