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Disinfection inducing release of contaminants from baby play mats: Microplastics and volatile organic compounds
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Researchers studied how different disinfection methods affect the release of microplastics and volatile organic compounds from baby play mats. They found that UV-based sterilization caused play mats to shed two to three times more microplastic particles than chlorine bleaching, with the type of plastic material also influencing how many particles were released. The findings suggest that chlorine bleaching is a safer disinfection choice for children's play mats, as it produces fewer microplastics and fewer potentially harmful chemical byproducts.
Baby play mats serve as essential protective equipment widely utilized in residences, daycares, and kindergartens. Given their direct contact with infants and young children, the pollutants released from play mats may pose potential health risks. This study investigated the impact of disinfection on the release of microplastics (MPs) from play mats and offers an in-depth analysis of the derived volatile organic compounds (VOCs) release. The results revealed that various disinfection treatments promoted the release of MPs from play mats. Among them, chlorination bleaching induced play mats to produce 2-3 times less MPs than ultraviolet sterilization (UVS) and UV-bleaching disinfection. The generation potential of MPs derived from play mats of different materials was ranked as polyethylene terephthalate (PET) > polypropylene (PP) ≈ polyethylene (PE) > polyvinyl chloride (PVC). Furthermore, PE play mat released highest concentration of total VOC after disinfection, increasing from 1.82 mg/m (control) to 15.82 mg/m (UV-bleaching). However, PVC released the most species of VOCs, with 76 species identified through non-target screening, such as several alkanes, alkenes, alcohols, ketones, etc. Through toxicological prediction, VOCs with high toxic potential were identified. Individual VOCs from PP, such as Pentadecane (CAS: 629-62-9), exhibited high yields at 3.16 ng/g after UV-bleaching treatment. In conclusion, chlorination bleaching is safer than UVS and UV-bleaching disinfection in mitigating the release of pollutants from play mats.
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Researchers tested how two common mask disinfection methods, UV light and bleach, affect different mask filter layers and found that both release microplastics and volatile organic compounds. UV disinfection caused more surface damage and released more microplastic particles, while bleach produced higher levels of volatile chemicals. The findings suggest that reusing disinfected masks may introduce secondary exposure to microplastics and chemical byproducts.
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Researchers examined how UV, chlorine, and combined UV/chlorine disinfection treatments cause microplastics to release volatile organic compounds, identifying distinct degradation pathways for polypropylene, polystyrene, and PVC that generate diverse chemical byproducts in treated water.
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Researchers tested how common indoor flooring materials, including carpet tiles, laminate, and PVC flooring, release microplastics when exposed to UV light from sunlight and foot traffic. All three materials generated microplastic particles, with UV exposure accelerating the release and changing the chemical structure of the plastic surfaces. This study shows that indoor environments are a significant but often overlooked source of microplastic exposure through the air people breathe at home and work.
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Scientists investigated what happens to polyurethane microplastics during water chlorination, a standard step in water treatment. They found that chlorination breaks down the plastic surface and releases organic chemicals, especially from UV-weathered particles, which produced significantly more leached compounds. The findings suggest that water treatment processes themselves may inadvertently release harmful byproducts from microplastics.
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