Electro-ceramic self-cleaning membranes for biofouling control and prevention in water treatment

Anis, Shaheen Fatima; Lalia, Boor Singh; Khair, Mostafa; Hashaikeh, Raed; Hilal, Nidal

doi:10.1016/j.cej.2020.128395

Cited by 38 publications

(8 citation statements)

References 38 publications

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“…The typical characteristic XRD pattern of the commercial zeolite Y particles with all major peaks at 12.1°, 15.9°, 20.7°, and 24.1° is displayed in Figure 7 a. These peaks are attributed to the respective planes of (311), (331), (440), and (533), respectively [ 27 ]. Similar peaks are obtained in all the ball-milled samples with different ratios of CNF ( Figure 7 b).…”

Section: Resultsmentioning

confidence: 99%

Cellulose Nanofibrils as a Damping Material for the Production of Highly Crystalline Nanosized Zeolite Y via Ball Milling

et al. 2022

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Nanosized zeolite Y is used in various applications from catalysis in petroleum refining to nanofillers in water treatment membranes. Ball milling is a potential and fast technique to decrease the particle size of zeolite Y to the nano range. However, this technique is associated with a significant loss of crystallinity. Therefore, in this study, we investigate the effect of adding biodegradable and recyclable cellulose nanofibrils (CNFs) to zeolite Y in a wet ball milling approach. CNFs are added to shield the zeolite Y particles from harsh milling conditions due to their high surface area, mechanical strength, and water gel-like format. Different zeolite Y to CNFs ratios were studied and compared to optimize the ball milling process. The results showed that the optimal zeolite Y to CNFs ratio is 1:1 to produce a median particle size diameter of 100 nm and crystallinity index of 32%. The size reduction process provided accessibility to the zeolite pores and as a result increased their adsorption capacity. The adsorption capacity of ball-milled particles for methylene blue increased to 29.26 mg/g compared to 10.66 mg/g of the pristine Zeolite. These results demonstrate the potential of using CNF in protecting zeolite Y particles and possibly other micro particles during ball milling.

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Section: Resultsmentioning

confidence: 99%

Cellulose Nanofibrils as a Damping Material for the Production of Highly Crystalline Nanosized Zeolite Y via Ball Milling

et al. 2022

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“…In addition to the methods discussed electrically assisted, vibratory shear‐enhanced cleaning and green solvents have been recently reported. In the electrically enhanced membrane cleaning, an external DC voltage of around 0.5–2 V is applied for short times, enhancing membrane filtration performance and effective fouling mitigation; in the process, negatively charged particles could be driven away by electrostatic force and repelled from the membrane surface (Anis et al, 2021; Li, Su, et al, 2021). For example, by applying a negative charge of 2.0 V on a flat‐sheet conductive ceramic membrane fabricated by coating dopamine and carbon nanotubes (CNTs) onto the surface of α‐alumina membrane support, the fouling rate was reduced by approximately 50% (Li, Su, et al, 2021).…”

Section: Alternative Membrane Cleaning Methodsmentioning

confidence: 99%

“…Aiming to improve the antifouling properties, recent studies have also focused on surface modification by the incorporation of nanoparticles (Barati et al, 2021), graphene oxide quantum dots (GOQDs) (Gu et al, 2020), conductive nanozeolite/CNS (Anis et al, 2021), FeOCl coating (Liu, Yao, et al, 2020), enzymes in polymeric micelles (Kolesnyk et al, 2020), and nanofibers (Mao et al, 2022). Usually, the modified membrane shows superior biofouling resistance performance compared with the pristine membrane owing to the hydrophilic property and the stretchable chains on its surface, as observed for composite membrane developed by using commercial membrane material (PVDF) and thermo‐responsive attapulgite (t‐ATP) (Mao et al, 2022).…”

Section: Cleaning Of Modified Membranesmentioning

confidence: 99%

Alternative methods for cleaning membranes in water and wastewater treatment

Hilares

Singh²,

Meza

et al. 2022

Water Environment Research

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Membrane fouling is caused by foulant deposition or adsorption through physical or chemical interactions on the membrane surface, causing the reduction of flux through the membrane. The main drawbacks of chemical agents used for cleaning are cost, damage caused on the membrane, and waste stream making the process unattractive. Alternative, methods such as ultrasound, enzymatic process, and osmotic backwashing were explored for membrane cleaning. Among all mentioned methods, micronanobubbles have been reported as a promising and emergent method for membrane surface cleaning; unfortunately, the information is limited, but preliminary studies have shown it as an efficient, cheap, and environmentally friendly technique. Other methods like electrically and vibratory‐enhanced membrane cleaning also could be interesting but currently are unexplored and information is limited. Practitioner Points Chemical cleaning is an efficient option; however, from an environmental point of view, it is not attractive, and high concentrations could cause damage to the membrane. Micronanobubbles are an emergent and suitable technology for membrane and surface cleaning. Membrane modification and functionalization avoid membrane fast fouling, and the cleaning process is easier, but the manufacture cost could be expensive.

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“…Artificial self-cleaning materials are capable of creating an extremely water repellent surface, where water droplets enable the formation of approximately spherical shapes to pick up and remove bacteria, dust, and even viruses in the process of rolling, which hold great potentials in the remarkable reduction of bacterial adhesion on the substrate surface [ 13 , 14 , 15 , 16 ]. Until now, many examples have demonstrated that self-cleaning surfaces with a contact angle above 90° play vital roles in antifouling and antibacterial applications [ 17 , 18 , 19 , 20 , 21 ]. For instance, in 2022, Narain et al [ 18 ] developed a sugar-responsive and self-cleaning surface with a dual-functional property which not only greatly reduced the bacteria adhesion but also largely promoted the formation of a hydrophilic surface with excellent biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Quantum Dot (Bi QD)/Polydimethylsiloxane (PDMS) Nanocomposites with Self-Cleaning and Antibacterial Activity for Dental Applications

et al. 2022

Nanomaterials

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In the oral microenvironment, bacteria colonies are easily aggregated on the tooth-restoration surface, in the manner of a biofilm, which usually consists of heterogeneous structures containing clusters of a variety of bacteria embedded in an extracellular matrix, leading to serious recurrent caries. In this contribution, zero-dimensional (0D) bismuth (Bi) quantum dots (QDs) synthesized by a facile solvothermal method were directly employed to fabricate a Bi QD/polydimethylsiloxane (PDMS)-modified tooth by simple curing treatment. The result demonstrates that the as-fabricated Bi QD/PDMS-modified tooth at 37 °C for 120 min not only showed significantly improved hydrophobic performance with a water contact angle of 103° and 115° on the tooth root and tooth crown, respectively, compared to that (~20° on the tooth root, and ~5° on the tooth crown) of the pristine tooth, but also exhibited excellent antibacterial activity against S. mutans, superior biocompatibility, and biosafety. In addition, due to the highly photothermal effect of Bi QDs, the antibacterial activity of the as-fabricated Bi QD/PDMS-modified tooth could be further enhanced under illumination, even at a very low power density (12 mW cm−2). Due to the facile fabrication, excellent hydrophobicity, superior antibacterial activity, and biocompatibility and biosafety of the Bi QD/PDMS-modified tooth, it is envisioned that the Bi QD/PDMS-modified tooth with a fascinating self-cleaning and antibacterial performance can pave the way to new designs of versatile multifunctional nanocomposites to prevent secondary caries in the application of dental restoration.

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Electro-ceramic self-cleaning membranes for biofouling control and prevention in water treatment

Cited by 38 publications

References 38 publications

Cellulose Nanofibrils as a Damping Material for the Production of Highly Crystalline Nanosized Zeolite Y via Ball Milling

Cellulose Nanofibrils as a Damping Material for the Production of Highly Crystalline Nanosized Zeolite Y via Ball Milling

Alternative methods for cleaning membranes in water and wastewater treatment

Bismuth Quantum Dot (Bi QD)/Polydimethylsiloxane (PDMS) Nanocomposites with Self-Cleaning and Antibacterial Activity for Dental Applications

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