Efficiently mitigating permeability-reactivity trade-off and membrane fouling on Cu-N-C functionalized ceramic catalytic membrane for enhanced water treatment.

A novel transferring strategy to construct outstanding ceramic membranes for high-temperature dust-laden gas filtration

Advancing membrane fouling control via electrically driven microbubble generation: Phosphidation-enhanced electrocatalytic activity of Ni foam and numerical optimization of operational parameters.

Bimetallic catalytic ceramic membrane for sustained water purification: Role of Cu in stabilizing reduced Co centers

Deep learning modeling of kaolin-activated carbon (derived from cigarette waste) hybrid ceramic membrane performance for wastewater treatment applications

Fabrication of spherically-structured ceramic membrane for harsh high-salinity wastewater treatment via membrane distillation

Red mud-doped ceramic membrane: Cost-effective fabrication with enhanced antifouling performance in MBR

Artificial intelligence enabled fouling prediction and effect of adsorbent sources in submerged fluidized bed ceramic membrane reactor for food industry wastewater treatment.

The goal of carbon neutrality has strengthened the development of sustainable energy technologies, among which mixed ionic and electronic conducting oxygen transport membranes have gradually become research focuses because they have great potential in the production of high-purity oxygen, hydrogen purification, oxygen-containing catalytic reactions, and carbon dioxide capture. In this study, a graded porous-supported symmetric flat ceramic membrane was prepared by an aqueous tape-casting method using K2NiF4+δ-type oxide La2Ni0.95Mo0.05O4+δ as the membrane material. The membrane structure introduces graded porous support layers on both sides of the dense functional layer, ensuring efficient oxygen-ion transmission while maintaining excellent mechanical robustness. The results show that the oxygen flux of this material under the graded porous-supported symmetric structure is 3.18 mL min-1 cm-2 (i.e., 31.8 L min-1 m-2) when air is used as the feedstock gas, and it remains stable even under CO2 and coke oven gas. Compared with hollow-fiber membranes, this study not only has excellent air permeability, but also has significant advantages in simple production and high output. Due to its low cost, excellent CO2 tolerance, and long-term operational stability, it shows great potential in industrial applications.

Excessive alcohol intake is a major cause of acute alcoholic gastric injury (AGI), yet effective dietary preventive strategies remain limited. Here, ripe Pu-erh tea extract was fractionated into three membrane-separated fractions (T1-T3) and evaluated in preventive and therapeutic mouse models of AGI. The low-molecular-weight fraction T3 (<300 kDa), obtained using a 50 nm ceramic membrane, exhibited the strongest gastroprotective activity, with preventive efficacy exceeding therapeutic efficacy, highlighting the value of early intervention. Preventive T3 administration alleviated gastric mucosal injury, restored PGE2 levels, attenuated inflammation and oxidative stress, and improved intestinal barrier function. These effects were accompanied by gut microbiota remodeling, including enrichment of Dubosiella and Bifidobacterium and increased butyrate production. Antibiotic-mediated microbiota depletion attenuated T3 efficacy, supporting a microbiota-dependent mechanism. Serum metabolomics further indicated regulation of glutathione-related pathways. Overall, T3 represents a promising low-molecular-weight fraction of Pu-erh tea for dietary prevention of AGI through modulation of microbiota-gut-stomach homeostasis.

Dual-wavelength LED synergy-tailored charge dynamics and reactive species modulation for a high-performance photocatalytic ceramic membrane reactor in complex water matrices.

Washing oil, a petroleum product, is a mixture of naphthalene, fluorene, biphenyl, quinoline, pyridine, indole, and their substitutes. Emulsified washing oil wastewater contains small oil droplets that are stably dispersed in water, making oil recovery difficult. Therefore, advanced oxidation is used for removal, and a Fenton-like oxidation reaction using sodium percarbonate (SPC, Na2CO3·1.5H2O2) rather than hydrogen peroxide (H2O2) offers a safer alternative. In this study, Fe(II)-catalyzed SPC (Fe(II)/SPC) oxidation and ceramic membrane filtration were combined to achieve the continuous purification of emulsified washing oil wastewater. Fe(II) and SPC were injected at dosages of 144 and 96 mmol/h, respectively, and the washing oil removal efficiency from the 100 mg/L influent emulsion wastewater reached 98.77%. The significant reduction in total resistance indicated that the oxidation process effectively alleviated membrane fouling and enhanced the membrane's reusability. Quinoline was selected as the target analyte in the washing oil emulsion, and its degradation pathways via Fenton-like oxidation were proposed. The findings of this study provide a reference for the research on advanced oxidation-coupled membrane filtration for petroleum wastewater treatment.

Recycling aluminum-rich drinking water treatment sludge into ceramic membranes: Fabrication process and environmental impact assessment

Toward resilient ceramic anion exchange membranes for sustainable microbial fuel cells: Challenges and strategies

The goal of this study is to develop a multistage membrane filtration cascade using reverse osmosis (RO), nanofiltration (NF), and ultrafiltration (UF) to produce skim milk concentrate. Using the cascade or evaporation, skim milk concentrates with a dry matter of 40 %, 45 %, and 50 % were produced before being spray dried to produce skim milk powder. Ceramic rotating disc membranes were used to process the highly viscous skim milk concentrate in the UF stage of the cascade. By recycling the permeates of the NF and UF stages of the cascade, the composition of the final UF retentate was close to that of regular skim milk concentrate. The flux of the membrane cascade ranged from 0.9–13 kg m -2 h -1 . The concentrates showed some differences in composition and viscosity, resulting in only minor variations in the functional properties of the skim milk powders. Membrane cascades are an emerging technology for concentrating skim milk. Compared to evaporators, membrane cascades mostly require electrical energy. This means that their use could reduce the environmental impact of the dairy sector. • A membrane cascade comprising reverse osmosis (RO), nanofiltration (NF) and ultrafiltration (UF) was developed to concentrate skim milk up to a dry matter of over 48 %. • Rotating ceramic membrane discs were essential to reach this dry matter. • Skim milk powders produced by membrane cascade had good functional properties. • Recycling of the NF and UF permeates produced an UF retentate composition comparable to skim milk.

Boosting the gas permeance of the fly-ash based ceramic membranes for ultra-fine particles filtration at high temperatures

Synergistic antifouling and organic removal using Fe/N co-doped biochar-modified ceramic membranes via in situ peroxymonosulfate activation

Structural optimization of FeOCl-functionalized hollow fiber ceramic membranes for catalytic ozonation of organic pollutants.

L-theanine is a characteristic non-proteinogenic amino acid found in tea leaves and has attracted considerable attention because of its diverse physiological activity and broad application prospects. γ-glutamyl transpeptidase (GGT) can catalyze the synthesis of L-theanine from L-glutamine and ethylamine without ATP consumption, highlighting its advantages for enzymatic production. In this study, a complete process was established for L-theanine production. Through screening of single and dual promoters, the optimal expression combination, PyxiE-PspoVG, was identified. Furthermore, by integrating the dal selection marker, an antibiotic-free engineered strain was developed. After flask-level optimization, the GGT activity reached 27.32 U/mL and further increased to 127.37 U/mL in 3 L fed-batch fermentation. Using the fermentation broth as the biocatalyst, fed-batch conversion of 0.6 M L-glutamine and 2 M ethylamine yielded 0.52 M (91.44 g/L) L-theanine within 24 h. Further integration of ceramic membrane filtration, ultrafiltration, nanofiltration, electrodialysis, activated-carbon decolorization and ethanol crystallization afforded a final product purity of 95.6%. This study offers a useful reference for large-scale L-theanine production.

Ceramic membranes show potential for high-temperature CO2 extraction from flue gas; nevertheless, their performance under simultaneous heat and pressure stress is not well comprehended. This research addresses the temperature-dependent CO2/N2 separation characteristics of a commercial ceramic membrane (pore size ~0.1–1 µm) utilizing simulated flue gas (11.8% CO2, 74.2% N2, 2.5% O2, remainder CH4) at temperatures ranging from 60 to 140 °C and pressures between 4 and 6 bar. Calibrated GC-TCD was used to quantify permeate compositions across multiple operating valve openings. With a CO2/N2 selectivity (α) of 0.75 at 4 bars, the maximum CO2 enrichment peaked at 80 °C (10.8 mol%), getting close to the Knudsen diffusion limit (0.80). Selectivity decreased dramatically beyond 100 °C—α = 0.61 (100 °C), 0.45 (140 °C)—and CO2 dropped to 5.8% at 4 bar and 2.2% at 6 bars. Viscous flow dominance was shown by the strong pressure amplification—α decreased by more than 60% from 4 to 6 bar at all temperatures. These findings emphasize the possibility of performance collapse in hot, pressured flue streams and identify the limited operating window under which Knudsen-controlled transport can be maintained. The study provides quantitative evidence of a transition in transport regime under mixed flue-gas conditions.