Antifouling Membranes Based on Cellulose Acetate (CA) Blended with Poly(acrylic acid) for Heavy Metal Remediation

Ounifi, Ibtissem; Guesmi, Youssef; Ursino, Claudia; Santoro, Sergio; Mahfoudhi, Sélim; Figoli, Alberto; Ferjanie, Ezzedin; Hafiane, Amor

doi:10.3390/app11104354

Cited by 20 publications

(7 citation statements)

References 55 publications

(59 reference statements)

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“…The results showed molecular water strongly linked to hydrogen bonds with SiOH groups, which leads to a drastic drop in the membrane hydraulic permeability, from 57 to 10 kg h −1 m −2 bar −1 . In comparison with the CA membrane, the inclusion of 5 and 10 mol% silica enhanced the hydraulic permeability from 32 to 82 kg h −1 m −2 bar −1 [55].…”

Section: Scanning Electron Microscopy (Sem) Image Of Ultrafiltration ...mentioning

confidence: 91%

Cellulose Acetate Membrane Preparation for Wastewater Treatment

Ounifi¹,

Khaled²,

Kahloul³

et al. 2023

Cellulose - Fundamentals and Conversion Into Biofuel and Useful Chemicals

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For a long time, humans have used cellulose, as a natural, renewable, and transformative polymer, for scientific development to create new technologies. Cellulose is the most abundant biopolymer on Earth, accounting for more than 50% of terrestrial biomass. For this reason, the treated cellulose (cellulose acetate (CA)) was used in the membrane preparation for water desalination. However, membrane preparation has recently attracted big attention of several research groups. In this case, cellulose acetate (CA), as an inexpensive hydrophilic biopolymer, was chosen as a polymer for preparing the membranes via the inversion phase, since it offers an efficient purification benefit with low energy consumption and less cost. The purpose of this chapter is to describe the various types of membrane preparation based on cellulose acetate, with pathogens, bacteria, and heavy metal (cadmium), and the applications of these membranes in the treatment of contaminated water, to ensure a clean water supply for both human and industrial uses.

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Section: Scanning Electron Microscopy (Sem) Image Of Ultrafiltration ...mentioning

confidence: 91%

Cellulose Acetate Membrane Preparation for Wastewater Treatment

Ounifi¹,

Khaled²,

Kahloul³

et al. 2023

Cellulose - Fundamentals and Conversion Into Biofuel and Useful Chemicals

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“…Poly(acrylic acid) (PAA) enables a significant increase in water trapping in a membrane and is characterized by its biocompatibility. Furthermore, it is an effective crosslinking agent; its large number of carboxyl groups allows for easy adsorption or chelation of heavy metal ions, so it has been used for their removal [ 108 , 109 ]. Although the impact of PAA on the hydrophilicity and antifouling property of blending modified membranes can be demonstrated, the stability of the modifying agent in the matrix membrane can also be an issue.…”

Section: Antifouling Materials For Polymeric Membranesmentioning

confidence: 99%

“…Similarly to PVP, increasing the molecular weight permits one to address this issue, as it improves the tangling of PAA chains with the main polymer matrix chains. Ounifi et al examined the effect of PAA on the removal of cadmium by cellulose acetate (CA) membranes [ 108 ]. The blending of 15 wt% of PAA into the CA matrix membrane led to a sharp decrease in the WCA from 71.5° to 25.0°, while the porosity increased from 44.6% to 75.6%.…”

Section: Antifouling Materials For Polymeric Membranesmentioning

confidence: 99%

“…Although BSA dominates, other foulants are used. Humic acid has been employed [ 43 , 108 , 122 , 142 ], as well as oil [ 63 , 180 ], extracellular polymeric substances (EPS) [ 238 ], diluted commercial milk [ 106 ], microalgae (MA) [ 153 , 373 ] or bacteria [ 123 , 363 ]. Microalgae and bacterial solution are particularly appropriate to the performance evaluation of MF membranes, typically prepared by VIPS or TIPS, given their characteristic size.…”

Section: Assessments Of Antifouling Properties Of Modified Membranes ...mentioning

confidence: 99%

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Recent Advances on the Fabrication of Antifouling Phase-Inversion Membranes by Physical Blending Modification Method

et al. 2023

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Membrane technology is an essential tool for water treatment and biomedical applications. Despite their extensive use in these fields, polymeric-based membranes still face several challenges, including instability, low mechanical strength, and propensity to fouling. The latter point has attracted the attention of numerous teams worldwide developing antifouling materials for membranes and interfaces. A convenient method to prepare antifouling membranes is via physical blending (or simply blending), which is a one-step method that consists of mixing the main matrix polymer and the antifouling material prior to casting and film formation by a phase inversion process. This review focuses on the recent development (past 10 years) of antifouling membranes via this method and uses different phase-inversion processes including liquid-induced phase separation, vapor induced phase separation, and thermally induced phase separation. Antifouling materials used in these recent studies including polymers, metals, ceramics, and carbon-based and porous nanomaterials are also surveyed. Furthermore, the assessment of antifouling properties and performances are extensively summarized. Finally, we conclude this review with a list of technical and scientific challenges that still need to be overcome to improve the functional properties and widen the range of applications of antifouling membranes prepared by blending modification.

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“…A sample from the permeate as well as the feedwater was collected, and the concentration of solute was measured by a TDS-meter (Adwa, AD32).Performance evaluation was made based on the permeate water flux and membrane salt rejection calculations as shown in Eqs. (1 and 2)(Ahmad et al 2015;Ounifi et al 2021).…”

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confidence: 99%

Cellulose acetate/polyvinylidene fluoride based mixed matrix membranes impregnated with UiO-66 nano-MOF for reverse osmosis desalination

et al. 2022

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Reverse osmosis (RO) is considered a lifesaver technology to conquer the current catastrophic water shortage situation. However, reaching a competitive RO membrane is a challenging issue. Therefore, this study investigated the optimum polymeric blending ratio between cellulose acetate (CA) and polyvinylidene fluoride (PVDF) to have a new blended polymeric membrane named cellulose acetate polyvinyl (CAPV-X), where X is the PVDF concentration %, with enhanced properties. The optimum prepared CA/PVDF blended membrane was selected for further enhancement with nano sized metal organic framework (UiO-66 MOF). Selection was made depending on each membrane salt rejection. A membrane characterization was performed based on Fourier transform infrared (FTIR), X-ray diffractometer (XRD), scanning electron microscope, thermal gravimetric analysis, and contact angle. FTIR and XRD data confirmed the successful preparation of the blended polymeric membranes CAPV-5, CAPV-7 and CAPV-10. Further, they proved UiO-66 nanofiller impregnation in the hybrid CA/PVDF/UiO-66 membrane (CPU). The addition of PVDF and nano-MOF had a slight positive effect on the membrane thermal stability. The contact angle increased with increasing the PVDF concentration and decreased once more with the impregnation of UiO-66. The RO membrane performance revealed that the optimum CA/PVDF ratio was found to be 93/7% with around 80% salt rejection and a permeate water flux of 4 L/m2 h. CPU composite membrane was then fabricated to enhance salt rejection and permeate water flux. The testing data indicated that salt rejection and permeate water flux increased over blended CAPV-7 membrane by almost 12% and 42%, respectively. Overall, CPU hybrid membrane could be used for water desalination with a good salt rejection of 90.2% and a permeate water flux of 5.7 L/m2 h. Graphical abstract

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Antifouling Membranes Based on Cellulose Acetate (CA) Blended with Poly(acrylic acid) for Heavy Metal Remediation

Cited by 20 publications

References 55 publications

Cellulose Acetate Membrane Preparation for Wastewater Treatment

Cellulose Acetate Membrane Preparation for Wastewater Treatment

Recent Advances on the Fabrication of Antifouling Phase-Inversion Membranes by Physical Blending Modification Method

Cellulose acetate/polyvinylidene fluoride based mixed matrix membranes impregnated with UiO-66 nano-MOF for reverse osmosis desalination

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