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AppliedChem, Volume 5, Issue 3 (September 2025) – 2 articles

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20 pages, 1759 KiB  
Article
Chromium Ferrite Supported on Activated Carbon from Olive Mill Solid Waste for the Photo-Fenton Degradation of Pollutants from Wastewater Using LED Irradiation
by Malak Hamieh, Sireen Al Khawand, Nabil Tabaja, Khaled Chawraba, Mohammad Hammoud, Sami Tlais, Tayssir Hamieh and Joumana Toufaily
AppliedChem 2025, 5(3), 15; https://doi.org/10.3390/appliedchem5030015 - 11 Jul 2025
Abstract
In this study, chromium ferrite (FeCr; CrFe2O4) nanoparticles supported on activated carbon (AC), obtained from agricultural olive mill solid waste, were synthesized via a simple hydrothermal process. The structural, morphological, optical, and chemical properties of the FeCr/AC composite were [...] Read more.
In this study, chromium ferrite (FeCr; CrFe2O4) nanoparticles supported on activated carbon (AC), obtained from agricultural olive mill solid waste, were synthesized via a simple hydrothermal process. The structural, morphological, optical, and chemical properties of the FeCr/AC composite were characterized using XRD, SEM, EDX, DRS, BET, and FTIR techniques. The FeCr/AC composite was applied as a heterogeneous photo-Fenton catalyst for the degradation of methylene blue (MB) dye in an aqueous solution under 25 W visible-light LED irradiation. Critical operational factors, such as FeCr/AC dosage, pH, MB concentration, and H2O2 levels, were optimized. Under optimal conditions, 97.56% of MB was removed within 120 min of visible-light exposure, following pseudo-first-order kinetics. The composite also exhibited high efficiency in degrading methyl orange dye (95%) and tetracycline antibiotic (88%) within 180 min, with corresponding first-order rate constants of 0.0225 min−1 and 0.0115 min−1, respectively. This study highlights the potential of FeCr/AC for treating water contaminated with dyes and pharmaceuticals, in line with the Sustainable Development Goals (SDGs) for water purification. Full article
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18 pages, 12927 KiB  
Article
Plasticized Polylactide Film Coating Formation from Redispersible Particles
by Oleksiy Myronyuk, Denys Baklan, Anna Bilousova, Illia Smalii, Victoria Vorobyova, Vita Halysh and Inna Trus
AppliedChem 2025, 5(3), 14; https://doi.org/10.3390/appliedchem5030014 - 9 Jul 2025
Abstract
The aim of this work was to improve the technology for obtaining coating based on plasticized polylactide from its aqueous suspensions. For this purpose, a film formation process with additional heating was developed, and the influence of plasticizers on the film-formation temperature was [...] Read more.
The aim of this work was to improve the technology for obtaining coating based on plasticized polylactide from its aqueous suspensions. For this purpose, a film formation process with additional heating was developed, and the influence of plasticizers on the film-formation temperature was investigated. It is shown that using only mechanical emulsification, it is possible to obtain a material with an average particle size of 2.4 microns, which is suitable for further research and modification for film materials. The introduction of epoxidized fatty acids (oleic and linolic) was found to reduce the film-formation temperature by 20–30 °C compared to the unplasticized polymer, which puts them on par with the classical plasticizer, polyethylene glycol, reducing the film-formation temperature by 36% at the same concentration. Full article
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