![]() Reviewed articles have demonstrated that volcanic particle materials can serve as a polymer composite filler. Then, it reviews the thermal and mechanical properties of polymer composites that filled with different volcanic particle materials such as volcanic ash, pumice, perlite, and tuff. The review begins with Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) analysis of different volcanic materials. Also, it highlights different types of volcanic particle materials and their potential effect on the performance of polymer composites. This paper reviews a literature survey on the usage of volcanic particle materials as an alternative filler material in polymer composites. ![]() This work established a correlation between regions with a higher flow of people and, consequently, more significant maintenance and cleaning, with a lower frequency of microplastics, and regions with a lower flow of people, such as places with more vegetation, where the incorrect disposal of solid waste results in a higher frequency of microplastics with characteristics of degradation by weathering. The FTIR indicated the presence of polypropylene, polyethylene terephthalate, and polyethylene, with an abundance of 1401 items kg⁻¹ for the park and 2393 items kg⁻¹ in the landfill, indicating that parks have high amounts of MPs in the soil, like landfills, being a source of contaminants with risk of toxicity. Results indicated the presence of microplastics in the park soil in different morphologies, such as fragments and fibers, and degradation characteristics. The samples were characterized by optical microscopy and Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, and MPs abundancy and the results were compared with landfill soil as standard. For that, different sites at the park were selected, and soil was collected from the surface and 20 cm depth. This work aimed to carry out a comparative study between the municipal landfill and one park in Santo André (SP), Brazil, seeking to prove their presence and establish the types of plastics found in these environments, exploring the correlation between them. However, few studies evaluate areas with a high circulation of people, such as parks. The presence of microplastics (MPs) in different terrestrial ecosystems has adverse effects on planet biota and even on humans in the long term. The design of the degradable polyester material was conducive to reducing the generation of polyester micro plastic pollutants. The degradation of the macromolecular chain was from large to small, from small to without. The chain scission of polyester macromolecule led to the generation of formic acid, sodium sulfate, and short chain substances, and then they were degraded into CO2 and H2O. In addition, degradation products and degradation pathway were analyzed by ultra-high-performance liquid chromatography-mass spectrometry. After 400 h illumination, the polyester matrix could be almost completely degraded. ![]() The result indicated that cationic dyeable polyester modified with 5% g-C3N4/TiO2 composite had excellent self-degradation ability in water environment under solar illumination. In this work, the cationic dyeable polyester modified with photocatalyst g-C3N4/TiO2 was synthesized by centrifugal electrospinning, which had a photodegradable function under solar illumination. Degradable materials were considered as the most promising way to solve the problem of plastic pollution. Plastic wastes threaten the environment security. ![]()
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