Developing better ceramic membranes for water and wastewater Treatment: Where microstructure integrates with chemistry and functionalities

Gu, Qilin; Ng, Tze Chiang Albert; Bao, Yueping; Ng, How Yong; Tan, Swee Ching; Wang, John

doi:10.1016/j.cej.2021.130456

Cited by 77 publications

(31 citation statements)

References 179 publications

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“…The active antifouling ceramic membranes can slow down the membrane fouling process by minimizing the interactions between the foulants and membranes. However, an additional mass transfer resistance is usually introduced due to either an increase in the membrane top layer thickness or a decrease of membrane pore sizes [34]. The decrease of the membrane pore size can improve membrane selectivity and potentially prevent the occurrence of internal fouling, while a reduction of pure water permeance is commonly observed for the membranes after modifications [34].…”

Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

“…However, an additional mass transfer resistance is usually introduced due to either an increase in the membrane top layer thickness or a decrease of membrane pore sizes [34]. The decrease of the membrane pore size can improve membrane selectivity and potentially prevent the occurrence of internal fouling, while a reduction of pure water permeance is commonly observed for the membranes after modifications [34]. To overcome this trade-off, a thin layer of highly hydrophilic materials is preferred to be used for ceramic membrane modifications to avoid the loss of water flux [143].…”

Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

“…Furthermore, the surface roughness is affected during modification. The increase in surface roughness can increase water flux due to a larger effective filtration area but may lead to a higher fouling potential [34]. However, regularly surface-patterned ceramic membranes, inducing turbulence of fluid on the membrane surface, are considered to increase both the flux and fouling resistance simultaneously [145].…”

Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

“…lead to a higher fouling potential [34]. However, regularly surface-patterned ceramic membranes, inducing turbulence of fluid on the membrane surface, are considered to increase both the flux and fouling resistance simultaneously [145].…”

Section: Photocatalytic Ceramic Membranementioning

confidence: 99%

“…In addition, pre-coating of a protective layer on the membrane surface is found to be effective for fouling alleviation [31][32][33], but this is not covered in this review. Membrane modification is achieved by changing the surface physicochemical properties of the membrane to alleviate the interaction between the oil droplets and membrane surfaces [34,35]. It is assumed that surface hydrophilicity, charge, and roughness are the three main factors affecting membrane fouling [30].…”

Section: Introductionmentioning

confidence: 99%

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State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

2021

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Membrane filtration is considered to be one of the most promising methods for oily wastewater treatment. Because of their hydrophilic surface, ceramic membranes show less fouling compared with their polymeric counterparts. Membrane fouling, however, is an inevitable phenomenon in the filtration process, leading to higher energy consumption and a shorter lifetime of the membrane. It is therefore important to improve the fouling resistance of the ceramic membranes in oily wastewater treatment. In this review, we first focus on the various methods used for ceramic membrane modification, aiming for application in oily wastewater. Then, the performance of the modified ceramic membranes is discussed and compared. We found that, besides the traditional sol-gel and dip-coating methods, atomic layer deposition is promising for ceramic membrane modification in terms of the control of layer thickness, and pore size tuning. Enhanced surface hydrophilicity and surface charge are two of the most used strategies to improve the performance of ceramic membranes for oily wastewater treatment. Nano-sized metal oxides such as TiO2, ZrO2 and Fe2O3 and graphene oxide are considered to be the potential candidates for ceramic membrane modification for flux enhancement and fouling alleviation. The passive antifouling ceramic membranes, e.g., photocatalytic and electrified ceramic membranes, have shown some potential in fouling control, oil rejection and flux enhancement, but have their limitations.

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Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

Section: Challenges Of Active Antifouling Ceramic Membranesmentioning

confidence: 99%

Section: Photocatalytic Ceramic Membranementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

2021

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Electro‐Conductive Ti₃C₂ MXene Multilayered Membranes: Dye Removal and Antifouling Performance

Zandi,

Rastgar,

Mohseni

et al. 2024

Adv Funct Materials

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This work describes the fabrication of a novel electroconductive membrane made of Ti3C2Tx (MXene) nanosheet coating through a one‐step pressure‐assisted technique. Ti3C2‐MXene is firmly attached over a polyamide–imide (PAI) microfilter by employing a binder composed of carboxymethyl cellulose (CMC)/glutaraldehyde (GA). Through coating a proper amount of multilayer Ti3C2‐MXene, the electrical conductivity of 174 ± 0.16 S m−1 is achieved. The rejection rates of reactive red 120 (RR120), reactive black (RB), and methyl orange (MO) by the pristine PAI membrane are 45.2%, 40.81%, and 33.65%, respectively. However, rejection rates significantly improve with the Ti3C2 MXene coating to over 99.71%, 97.95%, and 68.91% for RR120, RB, and MO. Applying a 4 V cathodic potential resulted in a flux recovery ratio (FRR) of 99.83% and a flux decline rate (FDR) of less than 1% during humic acid (HA) filtration. Without applying voltage, the MXene‐coated membrane shows an FRR and FDR of 92.51% and 45.56%, respectively. Surface energy analysis reveals strong repulsive interactions between foulants and the membrane surface. Moreover, the surface free energy indicates that foulants such as sodium alginate (SA) and bovine serum albumin (BSA) exhibit stronger adhesion to the membrane than HA, consistent with the fouling experiment results.

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The Significance and Usage Strategies of Macromolecules in 3D Printed Ceramic Composites

Wang,

Qiao,

Chen

et al. 2024

Advanced Materials

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Abstract3D printing technology enables the creation of complex ceramic structures and enhances the efficiency of customized ceramic production. Polymers play a crucial role in 3D‐printed ceramic composites due to their unique processability, yet their significance and application strategies remain underexplored. These polymers not only enable rapid and precise 3D shaping but also offer additional advantages due to their unique and adjustable physicochemical properties. Therefore, the appropriate selection and utilization of polymers are expected to drive new breakthroughs in the field of 3D‐printed ceramic composites. This review provides an overview of relevant additive manufacturing technologies and processes, with a specific focus on the strategies for using polymers in 3D‐printed ceramic composites, including their roles as binders, templates, preceramics, and matrices. Highlighting the critical functionalities and potential value of these ceramic composites from a practical application perspective.

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Developing better ceramic membranes for water and wastewater Treatment: Where microstructure integrates with chemistry and functionalities

Cited by 77 publications

References 179 publications

State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

Electro‐Conductive Ti₃C₂ MXene Multilayered Membranes: Dye Removal and Antifouling Performance

The Significance and Usage Strategies of Macromolecules in 3D Printed Ceramic Composites

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Developing better ceramic membranes for water and wastewater Treatment: Where microstructure integrates with chemistry and functionalities

Cited by 77 publications

References 179 publications

State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

State-of-the-Art Ceramic Membranes for Oily Wastewater Treatment: Modification and Application

Electro‐Conductive Ti3C2 MXene Multilayered Membranes: Dye Removal and Antifouling Performance

The Significance and Usage Strategies of Macromolecules in 3D Printed Ceramic Composites

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Product

Resources

About

Electro‐Conductive Ti₃C₂ MXene Multilayered Membranes: Dye Removal and Antifouling Performance