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Critical review on airborne microplastics: An indoor air contaminant of emerging concern
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This review summarizes existing research on microplastics floating in indoor air, finding that synthetic textiles, flooring materials, and increased use of plastic protective equipment since the pandemic are major sources. Indoor microplastic levels can be higher than outdoor levels, and inhaling these particles has been linked to respiratory, immune, and nervous system concerns. The findings highlight that people face significant microplastic exposure simply from breathing the air in their own homes and workplaces.
Airborne Microplastics (MPs), an emerging environmental issue, have gained recent attention due to their newfound presence in indoor environments. Utilizing the Web of Science database for literature collection, the paper presents a comprehensive review of airborne MPs including emission sources, assessment methods, exposure risks, and mitigation strategies. This review delves into the diverse sources and mechanisms influencing indoor airborne MP pollution, underscoring the complex interplay between human activities, ventilation systems, and the characteristics of indoor environments. Major sources include the abrasion of synthetic textiles and the deterioration of flooring materials, with factors like carpeting, airflow, and ventilation significantly impacting MP levels. Human activities, such as increased movement in indoor spaces and the intensive use of plastic-based personal protective equipment (PPE) post-pandemic, notably elevate indoor MP concentrations. The potential health impacts of airborne MPs are increasingly concerning, with evidence suggesting their role in respiratory, immune, and nervous system diseases. Despite this, there is a scarcity of information on MPs in diverse indoor environments and the inhalation risks associated with the frequent use of PPE. This review also stresses the importance of developing effective strategies to reduce MP emissions, such as employing HEPA-filtered vacuums, minimizing the use of synthetic textiles, and enhancing indoor ventilation. Several future research directions were proposed, including detailed temporal analyses of indoor MP levels, interactions of MP with other atmospheric pollutants, the transport dynamics of inhalable MPs (≤10 μm), and comprehensive human exposure risk assessments.
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This review examines microplastic pollution in the atmosphere, covering both indoor and outdoor sources and the challenges of measuring airborne particles. Researchers found that indoor environments, where people spend most of their time, can have particularly high concentrations of microplastics from synthetic textiles and household items. The study highlights that inhaling airborne microplastics is an important but under-studied route of human exposure.
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This review provides a comprehensive assessment of airborne microplastic pollution, covering their sources, distribution in indoor and outdoor environments, and potential health effects. Researchers found that airborne microplastics are present in diverse settings from homes to remote mountain regions, with textile fibers being the most common type. The study highlights that understanding the health risks of inhaling these particles remains an urgent research priority.
Airborne microplastics: Occurrence, sources, fate, risks and mitigation
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This review compiles findings from over 140 studies on airborne microplastics, covering their sources, distribution, and health risks in both indoor and outdoor environments. Researchers found that indoor environments often have higher microplastic concentrations than outdoor air, with textiles and building materials being major sources. The study highlights growing evidence that inhaled microplastics may pose respiratory health risks and calls for standardized measurement methods.
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This study provided one of the first comprehensive overviews of microplastic contamination in both indoor and outdoor air, establishing that microplastics are airborne and that indoor environments may have higher concentrations than outdoors due to synthetic materials and textiles. The findings raised new concerns about inhalation as a pathway for human microplastic exposure.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.