Rapid and efficient adsorption of methylene blue dye from aqueous solution by hierarchically porous, activated starbons®: Mechanism and porosity dependence

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 436, P. 129174 - 129174

Published: May 18, 2022

Hierarchically porous activated Starbons® derived from starch are found to make excellent adsorbents for methylene blue, even in the presence of other dyes and inorganic salts, highlighting their potential be used water purification. The optimal material (S950C90) has a blue adsorption capacity (891 mg g-1) almost nine times higher than that unactivated S800 four commercial carbon at 298 K. onto materials (S950C90 S800K4) reaches equilibrium within 5 min. Adsorption data all show good fit Freundlich isotherm which allows Gibbs free energies calculated. capacities increase as pH solution increases, allowing dye desorbed by treatment with acidic ethanol Starbon® reused. Porosimetry SEM-EDX imaging indicate adsorbs throughout surface completely fills micropores adsorbent. correlations both BET areas micropore volumes materials.

Language: Английский

---

Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review

RSC Advances, Journal Year: 2023, Volume and Issue: 13(27), P. 18404 - 18442

Published: Jan. 1, 2023

Photocatalysis is a more proficient technique that involves the breakdown or decomposition of different organic contaminants, various dyes, and harmful viruses fungi using UV visible light solar spectrum. Metal oxides are considered promising candidate photocatalysts owing to their low cost, efficiency, simple fabricating method, sufficient availability, environment-friendliness for photocatalytic applications. Among metal oxides, TiO

Language: Английский

---

Green synthesis of copper oxide nanoparticles using Ephedra Alata plant extract and a study of their antifungal, antibacterial activity and photocatalytic performance under sunlight

Heliyon, Journal Year: 2023, Volume and Issue: 9(2), P. e13484 - e13484

Published: Feb. 1, 2023

In the present work, copper oxide (CuO NPs) was synthesized by an eco-friendly, simple, low-cost, and economical synthesis method using Ephedra Alata aqueous plant extract as a reducing capping agent. The biosynthesized CuO-NPs were compared with chemically obtained to investigate effect of preparation on structural, optical, morphological, antibacterial, antifungal, photocatalytic properties under solar irradiation. CuO NPs characterized X-ray diffraction (XRD), UV-VIS spectroscopy, Fourier transform infrared spectrometer (FTIR) analysis, field emission scanning electron microscopy energy dispersive spectroscopy (FESEM-EDX). activities biosynthetic prepared studied methylene blue upon exposure results showed that photocatalyst more efficient than for Methylene Blue (MB) degradation irradiation, MB rates 93.4% 80.2%, respectively. addition, antibacterial antifungal evaluated. disk diffusion technique used test against gram-negative bacteria, Staphylococcus aureus Bacillus subtilis, well C. Albicans S. cerevisiae. activity. revealed can play vital role in destruction pathogenic dyes, activity agents bioremediation industrial domestic waste.

Language: Английский

---

Facile Green Synthesis of ZnO NPs and Plasmonic Ag-Supported ZnO Nanocomposite for Photocatalytic Degradation of Methylene Blue

Water, Journal Year: 2023, Volume and Issue: 15(3), P. 384 - 384

Published: Jan. 17, 2023

Removing organic pollutants, textile dyes, and pharmaceutical wastes from the water bodies has become an essential requirement for a safe environment. Therefore, present study aimed to prepare semiconductor zinc oxide nanoparticles (ZnO NPs) plasmonic Ag-supported ZnO nanocomposite (ZnO–Ag) using environmentally friendly bio-approach as alternative hazardous synthesis approaches. NPs ZnO–Ag were characterized by UV–Vis diffuse reflectance spectroscopy (UV–DRS) (the exhibited absorption band between 450–550 nm, attributed Ag surface plasmon resonance (SPR)), Photoluminescence (PL) spectral investigation, which revealed PL emission intensity of was lower than pure NPs, describing extended electron-hole pair (e--h+) lifespan photogenerated charge carriers, Fourier transform infrared (FTIR), FT-Raman, X-ray diffraction (XRD) analyses deduced. In addition, energy dispersive (SEM-EDX), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) performed further ascertained successful biosynthesis thermally stable Nps nanocomposite. The as-prepared displayed increased photocatalytic characteristics due decline in bandgap 3.02 eV 2.90 (ZnO–Ag nanocomposite). activity developed degradation methylene blue (MB) dye, primary industry released water-pollutant, conducted under UV light irradiation. Meanwhile, maximum % MB dye molecules attained 98.0 after 60 min exposure UV-light Increased nanocomposites faster rate achieved deposition (SPR) effect possessed NPs. oxidative route that resulted production hydroxyl radicals (OH•). SPR photocatalyst induced synergistic enhancement optical response separation photo-induced carriers. combined gives comprehensive information directions future research on noble metal-modified nanocatalysts direct applications water.

Language: Английский

---

Removal and degradation of dyes from textile industry wastewater: Benchmarking recent advancements, toxicity assessment and cost analysis of treatment processes

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113754 - 113754

Published: Aug. 6, 2024

Language: Английский

---

Preparation and Physio–Chemical characterisation of activated carbon derived from prosopis juliflora stem for the removal of methylene blue dye and heavy metal containing textile industry effluent

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 397, P. 136579 - 136579

Published: Feb. 24, 2023

Language: Английский

---

The Effect of Mineral Ions Present in Tap Water on Photodegradation of Organic Pollutants: Future Perspectives

Water, Journal Year: 2023, Volume and Issue: 15(1), P. 175 - 175

Published: Jan. 1, 2023

Photodegradation is the chemical conversion of large, toxic, and complex molecules into non-toxic, simpler, lower molecular weight species due to light exposure. Heterogeneous photocatalysis has sufficient potential degrade toxic organic pollutants present in wastewater. As industries discharge their effluents containing natural water bodies, which penetrate subsurface through connected pores it necessary study this process or tap water. Tap (TW) mainly obtained from underground wells having inorganic salts a minute quantity with conductivity 500 μS/cm. TW contains anions, affect photocatalytic activity process. The aim review evaluate effect on photo-degradation such as dyes, pharmaceutical products, pesticides, etc., support literature. had diverse photodegradation pollutants; either may enhance decrease rate pollutants’ photodegradation.

Language: Английский

---

Green Synthesis of Zinc Oxide Nanoparticles Using an Aqueous Extract of Punica granatum for Antimicrobial and Catalytic Activity

Journal of Functional Biomaterials, Journal Year: 2023, Volume and Issue: 14(4), P. 205 - 205

Published: April 7, 2023

The peel aqueous extract of Punica granatum was utilized to fabricate zinc oxide nanoparticles (ZnO-NPs) as a green approach. synthesized NPs were characterized by UV-Vis spectroscopy, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning microscopy, which attached an energy dispersive (SEM-EDX). Spherical, well arranged, crystallographic structures ZnO-NPs formed with sizes 10-45 nm. biological activities ZnO-NPs, including antimicrobial catalytic activity for methylene blue dye, assessed. Data analysis showed that the against pathogenic Gram-positive Gram-negative bacteria, unicellular fungi, observed occur in dose-dependent manner, displaying varied inhibition zones low minimum inhibitory concentration (MIC) values ranges 6.25-12.5 µg mL-1. degradation efficacy (MB) using is dependent on nano-catalyst concentration, contact time, incubation condition (UV-light emission). maximum MB percentages 93.4 ± 0.2% attained at 20 mL-1 after 210 min presence UV-light. there no significant difference between 210, 1440, 1800 min. Moreover, high stability degrade five cycles decreasing 4%. Overall, P. granatum-based are promising tools inhibit growth microbes UV-light emission.

Language: Английский

---

Zeolite supported CdS/TiO2/CeO2 composite: Synthesis, characterization and photocatalytic activity for methylene blue dye degradation

Materials Research Bulletin, Journal Year: 2023, Volume and Issue: 161, P. 112176 - 112176

Published: Jan. 28, 2023

Language: Английский

---

Application of biochar derived from crops residues for biofuel production

Fuel Communications, Journal Year: 2023, Volume and Issue: 15, P. 100088 - 100088

Published: March 13, 2023

Crop residues are a major component of lignocellulosic biomass waste generated from the agriculture sector. Improper management these wastes pollutes environment, contaminates water bodies, and constitutes hazards to human health. The conversion crop biochar is an ecologically benign sustainable strategy for management. This review provides novel insight into techniques converting various classes such as straws, peels, bagasse, husks, shells, cobs, stubbles biofuel production. updated information on description, benefits, drawbacks production including traditional, modern, also surveyed. study concluded effectiveness derived catalysts or support biodiesel, biohydrogen, biomethane deployment residue cost-effective, eco-friendly, contributes environmental sustainability. More multidisciplinary investigations required harness benefits derivable application synthesis confront challenges associated with generation process guarantee intensification use innovative technologies should be encouraged guide future research toward ensuring cleaner, ecological utilization

Language: Английский

---