We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Photocatalytic Degradation of Polyethylene, Polypropylene, and Sulfathiazole Using a UV/TiO2/Oxidant System
AI summary Read the abstract
Researchers tested a UV/TiO2 photocatalytic system with three oxidants for degrading polyethylene and polypropylene microplastics, achieving up to 17% weight loss for PE under UV/TiO2/H2O2 conditions, with FTIR analysis confirming formation of carbonyl degradation products. Photocatalytic degradation represents a promising remediation pathway for breaking down persistent microplastics in water treatment, though further work is needed to improve degradation rates and characterize byproduct toxicity.
Photocatalysis is widely acknowledged as an efficient technique for degrading a variety of pollutants, such as antibiotics, pesticides, herbicides, and microplastics. In this study, the micro-sized TiO2 photocatalyst with the oxidizing agents (H2O2, periodate, and oxone) was investigated for the degradation of polyethylene (PE), polypropylene (PP), and sulfathiazole (STZ). Firstly, the photocatalytic activity of synthesized TiO2 was evaluated by the decomposition of STZ (~ 94% within 30 min), and then the microplastic degradation experiments were conducted. The changes before and after the experiment were characterized using SEM, FTIR, and XPS. The weight loss for PE under the different combinations of experiments was UV (0%), UV/TiO2 (∼5.7%), UV/TiO2/H2O2 (∼17%), UV/TiO2/Periodate (∼16%), and UV/TiO2/Oxone (∼13.4%). The PP globules (~ 4 mm) did not have a significant impact on weight loss due to their large particle size and high rigidity. Meanwhile, PE showed improved weight loss due to a smaller particle size of ~ 20–100 µm. SEM images confirmed the degradation of the PE was significant while only a few surface modifications can be observed for PP. FTIR analysis revealed changes in carbonyl groups of PE and PP, including ketones (1720 cm−1), acids (1718 cm−1), esters (1735 cm−1), and vinyl groups (1650 cm−1). The synergy between the oxidants and the photocatalyst unquestionably enhanced the oxidation of the microplastics.
More Papers Like This
Photocatalytic Degradation of Macro—and Microplastics Using Titanium Dioxide (TiO₂)
AI summary Read the abstract
This review assessed titanium dioxide (TiO2) photocatalysis as a method for degrading macro- and microplastics, finding that UV-activated TiO2 can break polymer chains through reactive oxygen species under controlled conditions. Scalable photocatalytic degradation is a compelling remediation strategy because it can destroy microplastics rather than relocate them, potentially reducing the volume of particles available for human ingestion and environmental accumulation.
Photocatalytic Degradation of Organic Pollutants and Microplastics Using Ag/TiO2: Recent Advances in Mechanism, Synthesis and Properties
AI summary Read the abstract
This study reviewed how silver-modified TiO2 (Ag/TiO2) photocatalysts enhance the degradation of organic pollutants and microplastics by improving light absorption and charge separation compared to TiO2 alone. Developing efficient photocatalytic systems like Ag/TiO2 is a promising pathway for breaking down persistent microplastic particles in water and soil environments where conventional treatment methods fall short.
Photocatalytic Degradation of Microplastic Polyamide 66 by Ag/TiO2 Composite: Preparation of Catalysts and Photocatalytic Degradation Mechanism
AI summary Read the abstract
Researchers developed a silver-doped titanium dioxide photocatalyst that can break down polyamide 66 microplastics under UV light, revealing the degradation pathway and suggesting that photocatalysis could be a viable approach for treating certain plastic pollutants in water.
Evaluation of Microplastic Degradation Using Titanium Dioxide Photocatalyst in Water
AI summary Read the abstract
Researchers tested UV light and titanium dioxide photocatalysis to break down microplastic fibers in water, achieving a 97% reduction in mass within 48 hours under optimized conditions, suggesting this approach could be a viable treatment technology for wastewater facilities.
Photocatalytic Ozonation for the Degradation of Nanoplastics Using TiO 2 Nanotubes: The Effect of Polymer Type and Operational Conditions
AI summary Read the abstract
Scientists tested a new water-treatment method that uses a special coated material (TiO2 nanotubes) combined with ozone gas to break down tiny plastic particles, nanoplastics, that are too small for regular filters to catch. The method worked best in slightly acidic water and destroyed up to 87% of the plastic tested, and importantly, the catalyst material stayed intact and reusable afterward, suggesting it could be a practical, long-lasting tool for removing plastic contamination from drinking water before it ever reaches our bodies. More testing in real-world treatment plants is still needed before this could be widely used.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.