Effects of electroflocculation/oxidation pretreatment on the fouling characteristics of ultrafiltration membranes

Article Environmental Sciences

Enhanced water permeability and fouling resistance properties of ultrafiltration membranes incorporated with hydroxyapatite decorated orange-peel-derived activated carbon nanocomposites

Parashuram Kallem et al.

Summary: The novel PES nanocomposite UF membranes utilizing hydroxyapatite-decorated activated carbon exhibited lower water contact angle, higher pure water flux, and lower adsorption of pollutants compared to the original PES membranes.

CHEMOSPHERE (2022)

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Article Engineering, Chemical

A novel paradigm of photocatalytic cleaning for membrane fouling removal

Huiru Zhang et al.

Summary: This study successfully prepared a visible-light-activated photocatalytic membrane for efficient production of H2O2 and Fenton-like reactions, achieving effective membrane cleaning.

JOURNAL OF MEMBRANE SCIENCE (2022)

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Article Engineering, Chemical

The molecular structures of polysaccharides affect their reverse osmosis membrane fouling behaviors

Xin Tong et al.

Summary: This study found that the molecular structure rather than molecular weight of polysaccharides influenced the fouling behavior of reverse osmosis membranes. Branched-chain polysaccharides were more likely to cause severe membrane fouling and form thicker foulant layers on membrane surfaces compared to straight-chain polysaccharides. Additionally, the presence of Ca2+ had a significant impact on the fouling behavior of straight-chain acid polysaccharides but not on branched-chain polysaccharides or neutral polysaccharides.

JOURNAL OF MEMBRANE SCIENCE (2021)

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Review Polymer Science

Fouling and Chemical Cleaning of Microfiltration Membranes: A Mini-Review

Aysegul Gul et al.

Summary: Membrane fouling is a common issue in membrane separation processes, and cleaning the membrane is crucial for improving performance. Various techniques, including physical and chemical methods, are used for membrane cleaning. Factors such as cleaning time, chemical concentration, and temperature play a significant role in determining the effectiveness of chemical cleaning.

POLYMERS (2021)

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Article Engineering, Chemical

Chemical cleaning reagent of sodium hypochlorite eroding polyvinylidene fluoride ultrafiltration membranes: Aging pathway, performance decay and molecular mechanism

Liumo Ren et al.

Summary: The study systematically investigated the aging effects of NaClO on PVDF ultrafiltration membranes, finding a significant decline in antifouling performance for aged membranes, with stabilized fouling layers leading to increased irreversible fouling resistance. The intermolecular forces in combination with the interfacial free energies were used to evaluate the fouling behaviors of aged membranes, indicating a more spontaneous foulant-membrane adhesion and reduced flux recovery after physical cleaning. Comparatively, foulant-membrane interfacial free energies were found to be more sensitive and reliable indicators of membrane fouling.

JOURNAL OF MEMBRANE SCIENCE (2021)

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Article Engineering, Environmental

Separation and recovery of alkali cellulose wastewater with high concentration of salts by cross-linked poly(vinyl alcohol)/ polytetrafluoroethylene ultrafiltration membrane

Kang Yang et al.

Summary: Carboxymethyl Cellulose Sodium (CMC) is commonly used in industries like paper-making and textiles, and the treatment of CMC wastewater with salt and alkali has become a focus in wastewater treatment. In this study, membranes consisting of poly(vinyl alcohol) (PVA)/polytetrafluoroethylene (PTFE) were prepared for the separation of CMC and salt-alkali. Different cross-linking methods were used to enhance the structural stability of the membranes, resulting in improved separation performance. The membranes showed high salt-alkali optional transmitting rates, CMC rejection rates, and flux values, making them effective for the treatment of high-salt-alkali cellulose wastewater.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

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Review Environmental Sciences

A review on advances in green treatment of glycerol waste with a focus on electro-oxidation pathway

Muhammad Sheraz Ahmad et al.

Summary: This article reviews the techniques for synthesizing valuable chemicals from glycerol waste and the potential industrial applications of electro-oxidation technology, emphasizing the importance of catalysts in chemical reactions and providing fundamental insights into the development of future electrocatalysts.

CHEMOSPHERE (2021)

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Article Engineering, Environmental

Synthesis and characterization of novel zwitterionic poly(aryl ether oxadiazole) for antifouling ultrafiltration membrane

Zhaofeng Wang et al.

Summary: Zwitterionic polymers, such as ZPAEO, have excellent hydrophilicity and antifouling properties, making them ideal for membrane-based separation applications. The research successfully synthesized ZPAEO and fabricated a membrane with improved water permeability and fouling resistance. Experimental results demonstrated the superior long-term stability and performance of the ZPAEO membrane in protein solution filtration.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

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Review Biochemistry & Molecular Biology