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Physical and chemical degradation of littered personal protective equipment (PPE) under simulated environmental conditions
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Researchers studied the physical and chemical degradation of discarded face masks and gloves under simulated environmental conditions over 60 days. The study found that sun exposure caused significant polymer degradation in personal protective equipment, suggesting that littered PPE can break down relatively quickly and potentially release microplastic fragments into the environment.
Investigations of the physicochemical degradation of personal protective equipment (PPE) under controlled environmental conditions are largely lacking. Here the chemical and physical changes of face masks and gloves (recovered from the marine environment) were evaluated after exposure time up to 60 days of simulated environmental conditions. The results suggested that the polymer backbone of PPE suffers typical changes induced by sun exposure. Changes in the intensity of diffraction peaks indicated shifts in the crystallinity of PPE, possibly altering their thermal behavior. Signs of physical degradation in PPE, such as ruptures, and rough surfaces, which exacerbated over time were also detected. Additionally, signals of some elements of concern, such as Cu and Mo, and elements typically found in seawater were detected. The results of this study allowed us to better understand the degradation of typical PPE items in the marine environment, ultimately resulting in the release of microplastics and chemical contaminants.
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