Enhanced Photocatalytic and Filtration Performance of TiO2-Ag Composite-Coated Membrane Used for the Separation of Oil Emulsions DOI Creative Commons

Ákos Ferenc Fazekas,

Tamás Gyulavári, Áron Ágoston

et al.

Separations, Journal Year: 2024, Volume and Issue: 11(4), P. 112 - 112

Published: April 5, 2024

Polyvinylidene fluoride (PVDF) membranes were coated with TiO2 and TiO2-Ag to enhance their efficiency for oil-in-water emulsion separation. The photocatalytic activities of the two modified filtration performances compared in detail. significantly enhanced activity composite was proved using a methyl orange (MO) solution (c = 10−5 M) crude oil 50 mg·L−1). TiO2-Ag-coated membrane reduced MO concentration by 87%, whereas TiO2-modified reached only 46% decomposition. reduction chemical oxygen demand also ~50% higher that TiO2-coated membrane. photoluminescence measurements demonstrated electron/hole recombination, achieved Ag nanoparticle addition (TiO2-Ag), which explained activity. A significant improvement separation performance demonstrated: substantial increase flux recovery ratio (up 92.4%) achieved, together notable decay irreversible resistance. Furthermore, purification (achieving 98.5% 99.9% COD turbidity reductions, respectively). Contact angle, zeta potential, scanning electron microscopy (SEM), atomic force (AFM) carried out explain results. SEM AFM images revealed on membrane, less aggregated, more continuous, homogeneous, smoother nanolayer formed due negative potential nanocomposite TiO2. In summary, via addition, sufficiently hydrophilic, beneficially negatively charged, homogeneous PVDF surface resulted presented advantageous properties beyond enhancement.

Language: Английский

Ceramic membrane filtration for oily wastewater treatment: Basics, membrane fouling and fouling control DOI Creative Commons
Mingliang Chen, S.G.J. Heijman, L.C. Rietveld

et al.

Desalination, Journal Year: 2024, Volume and Issue: 583, P. 117727 - 117727

Published: May 8, 2024

Membrane technology presents an effective solution for treating oily wastewater, a significant environmental hazard stemming from industries such as food processing, metalworking, and oil extraction. Compared to polymeric membranes, ceramic ones exhibit superior mechanical, chemical, thermal stability, enabling more removal easier cleaning. Despite their advantages, membrane fouling remains challenge, impacting the efficiency of wastewater treatment. This review explores characteristics applications in treatment processes. It examines factors influencing fouling, including properties (e.g., concentration, pH), surface hydrophilicity, charge), operational parameters cross-flow velocity, permeate flux). Strategies mitigate pretreatment, backpulsing/backwashing sustained operation, chemical cleaning removal, are discussed. By using can be reduced. Backpulsing/backwashing is maintain long-term operation. Chemical removing irreversible restoring performance membranes. Moreover, modification techniques that enhance highlighted. Ultimately, identifies control crucial optimizing use treatment, underscoring need ongoing research this area.

Language: Английский

Citations

29
Facile synthesis of novel ZnO-MgO nanohybrids and its photocatalytic degradation of toxic pollutants DOI Creative Commons
Karthik Kannan,

B. Hemavathi,

Devi Radhika

et al.

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 317, P. 100125 - 100125

Published: Jan. 1, 2024

The development of high receptive photocatalysts for the degradation dye from water is an implication route to unravel complications contamination. ZnO-MgO nanocomposite was successfully prepared by egg albumin-assisted route. crystallinity, morphological, optical characteristics, and photocatalytic performance composite were investigated XRD, FTIR, SEM with EDS, UV-DRS. results XRD study affirmed that comprises hexagonal cubic stages a normal crystalline size 34 nm. FTIR demonstrates distinctive vibrational frequencies at 454 524 cm−1. micrographs represented nanoparticles flower-like structure. bandgap value (Eg) found as 4.5 eV nanocomposite. efficiency has been photodegradation Congo red under daylight illumination. obtained showed good solar light irradiation. antibacterial properties have assessed versus G+ G- bacteria. outcomes designated bacteriostatic behavior Staphylococcus aureus, Aeromonashydrophila Escherichia coli, Micrococcus luteus, Shigella, Staphylococcustyphi, epidermis, Vibrio cholera, Pseudomonas aeruginosa. Furthermore, this work (ZnO-MgO nanocomposite) offers significant insights into more efficient environmental biomedical applications.

Language: Английский

Citations

22
Novel CuO–SiO2 nanocomposites: synthesis, kinetics, recyclability, high stability and photocatalytic efficiency for Rose Bengal dye removal DOI
A. Gharbi, Hadia Hemmami, Salah Eddine Laouini

et al.

Transition Metal Chemistry, Journal Year: 2024, Volume and Issue: 49(3), P. 195 - 213

Published: Feb. 26, 2024

Language: Английский

Citations

10
Biosynthesized MgO@SnO2 nanocomposite and their modification with polyvinylpyrrolidone. Efficiency for removal of heavy metals and contaminants from industrial petroleum wastewater DOI

Chaima Salmi,

Salah Eddine Laouini, Souhaila Meneceur

et al.

Clean Technologies and Environmental Policy, Journal Year: 2024, Volume and Issue: 26(8), P. 2483 - 2502

Published: Feb. 20, 2024

Language: Английский

Citations

8
Improved Synthesis of Cu2O NPs and Ascorbic Acid-Modified Derivatives for Adsorption of Brilliant Cresyl Blue: Surface and Reusability Studies DOI Open Access

Zeghdi Saad,

Salah Eddine Laouini, Hamdi Ali Mohammed

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(10), P. 2358 - 2358

Published: May 15, 2024

This study addresses the critical need for efficient and recyclable photocatalysts water treatment applications by presenting a novel approach synthesis characterization of copper (I) oxide (Cu2O) nanoparticles modified with ascorbic acid (Cu2O/AA). The motivation this research stems from increasing concern about environmental pollution caused organic pollutants, such as Brilliant Cresyl Blue (BCB), necessity sustainable solutions to mitigate issue. Through comprehensive techniques including Ultraviolet–Visible spectroscopy (UV-Vis), Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), zeta potential measurements, Brunauer–Emmett–Teller (BET) analysis, we demonstrate significant modification electronic structure, enhancing photocatalytic activity Cu2O/AA. BET analysis revealed mesoporous structure specific surface area 2.7247 m2/g Cu2O/AA, further emphasizing its enhanced catalytic performance. degradation studies showcased remarkable efficiency improvements, coefficients 30.8% 73.12% Cu2O NPs Cu2O/AA NC, respectively, within 120 min timeframe. Additionally, recyclability experiments indicated sustained over five consecutive cycles, both catalysts retaining crystalline integrity. These findings underscore promising highly offering superior performance compared pure addressing pressing solutions.

Language: Английский

Citations

8
Efficient treatment of oily wastewater, antibacterial activity, and photodegradation of organic dyes using biosynthesized Ag@Fe3O4 nanocomposite DOI
Gamil Gamal Hasan, Salah Eddine Laouini, Abdelhamid Khelef

et al.

Bioprocess and Biosystems Engineering, Journal Year: 2023, Volume and Issue: 47(1), P. 75 - 90

Published: Dec. 11, 2023

Language: Английский

Citations

19
Synergistic chitin-zinc nanocomposites from shrimp shell waste: characterization, antioxidant, and antibacterial properties DOI

Abdelatif Aouadi,

Djamila Hamada Saoud,

Salah Eddine Laouini

et al.

Biomass Conversion and Biorefinery, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 23, 2023

Language: Английский

Citations

19
Optimizing photocatalytic performance with Ag-doped ZnO nanoparticles: Synthesis and characterization DOI Creative Commons

Atif Hussain,

Shamaila Fiaz,

Abdullah Almohammedi

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(15), P. e35725 - e35725

Published: Aug. 1, 2024

Language: Английский

Citations

7
In vitro and in silico study of biosynthesized silver nanoparticles using Nigella sativa extract against SARS-CoV-2 and Candida albicans DOI Creative Commons

Henda Daoudi,

Abderrhmane Bouafia, Salah Eddine Laouini

et al.

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 405, P. 125059 - 125059

Published: May 20, 2024

Pathogens that are resistant to multiple drugs, commonly known as superbugs, including viruses and fungi, posing a significant danger human health. These superbugs responsible for causing high rates of morbidity mortality each year, the numbers continuing rise. Therefore, search potent, safe, viable alternative antimicrobial agents is imperative. In current study, rapid eco-friendly method synthesizing silver nanoparticles (AgNPs) using Nigella sativa seed extract was developed. Various characterization techniques, ultraviolet–visible (UV–vis) spectroscopy, Fourier transform infrared (FTIR) X-ray diffraction (XRD), scanning electron microscopy associated with microanalysis by dispersive energy X-rays (SEM-EDX), Zeta-potential, were employed confirm formation AgNPs. Agglomerated particles spherical shape size approximately 50 nm identified in SEM images The optical bandgap AgNPs determined be 2.43 eV direct 1.87 allowable indirect band gap. study also investigated antiviral activity against XBB.1.5 SARS-CoV-2 variant assessed their Anti-Candida Assay Candida albicans. Furthermore, we conducted molecular docking studies explore interactions between Omicron receptor-binding motif (RBM). spike protein RBD binds receptor angiotensin-converting enzyme 2 (ACE2) cellular (hACE2) helps virus enter host cell. results indicated can bind RBD, potentially elucidating effects SARS-CoV-2. findings this suggest hold promise potent therapeutic applications, particularly addressing multidrug-resistant strains Candida. However, further research essential thoroughly elucidate mode action assess biosafety

Language: Английский

Citations

6
Nanostructured Mn@NiO composite for addressing multi-pollutant challenges in petroleum-contaminated water DOI Creative Commons
Gamil Gamal Hasan, Salah Eddine Laouini, Ahmed I. Osman

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(31), P. 44254 - 44271

Published: June 28, 2024

Abstract Efficient catalysts play a pivotal role in advancing eco-friendly water treatment strategies, particularly the removal of diverse organic contaminants found water-petroleum sources. This study addresses multifaceted challenges posed by contaminants, encompassing spectrum heavy metals such as As, Cd, Cr, Mn, Mo, Ni, Pb, Sb, Se, and Zn alongside pollutants like oily (OIW), total suspended solids (TSS), chemical oxygen demand (COD), dyes, pharmaceuticals, posing threats to both aquatic terrestrial ecosystems. Herein, we present synthesis biogenically derived Mn@NiO nanocomposite (NC) photocatalysts, sustainable methodology employing an aqueous Rosmarinus officinalis L. extract, yielding particles with size 36.7 nm. The catalyst demonstrates exceptional efficacy removing metals, achieving rates exceeding 99–100% within 30 min, notable efficiencies for OIW (98%), TSS (87%), COD (98%). Furthermore, our photodegradation experiments showed remarkable efficiencies, 94% degradation Rose Bengal (RB) 96% methylene blue (MB) 120 min. kinetics adhere pseudo-first-order behavior, rate constants 0.0227 min −1 RB 0.0370 MB. Additionally, NC exhibits significant antibiotic 97% cephalexin (CEX) amoxicillin (AMOX). enhanced photocatalytic performance is attributed synergistic interplay between Mn NiO nanostructures, augmenting responsiveness sunlight while mitigating electron-hole pair recombination. Notably, outstanding stability reusability across multiple cycles, maintaining its stable nanostructure without compromise. Graphical

Language: Английский

Citations

4