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Microplastic Aerosol Contamination in Porto (Portugal)
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Researchers conducted the first long-term assessment of airborne microplastics in Porto, Portugal, collecting samples over 18 months. Microplastic concentrations ranged from 26 to 1,484 particles per day per square meter, with significant temporal variability and correlations with weather conditions. Particles in the smallest size range (1.2 to 12 micrometers) are classified as PM10 and PM2.5, highlighting potential respiratory health concerns from inhaling airborne microplastics.
Microplastic pollution, particularly particles smaller than 5 mm, poses significant environmental and health risks due to their potential for inhalation and long-range transport. This study provides the first long-term assessment of airborne microplastics and fibers in Porto, Portugal, over 18 months (September 2022 to March 2024). Bi-weekly samples were collected using a Microplastic Collector NILU, which were size-fractionated into five categories (>125 μm, 125–63 μm, 63–25 μm, 25–12 μm, and 12–1.2 μm) and quantified via optical microscopy. Microplastic concentrations ranged from 26 to 1484 MPs/day/m2, while fiber concentrations varied from 14 to 646 fibers/day/m2. With a focus on the 12–1.2 μm size range due to their classifications as PM10 and PM2.5, the highest microplastic concentrations were 164 MPs/day/m2 (12–1.2 μm) and 534 MPs/day/m2 (25–12 μm). Recovery rates varied among polymers, with PP, PE-HD, and ABS showing high accuracy (75.9%) and PES significantly lower (26.5%). This study highlights the significant temporal variability in airborne microplastic and fiber pollution, correlations with meteorological parameters, and the need for ongoing monitoring and targeted mitigation strategies to address associated health risks.
More Papers Like This
Microplastic Aerosol Contamination in Porto (Portugal)
AI summary Read the abstract
Researchers conducted the first long-term 18-month monitoring of airborne microplastics in Porto, Portugal, collecting bi-weekly samples using a standardized NILU collector from September 2022 to March 2024. The study characterized the types, sizes, and seasonal patterns of microplastic aerosol deposition in an urban environment.
Identificação e quantificação de microplásticos na atmosfera do Porto e riscos para a saúde humana
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Researchers investigated the presence of airborne microplastics in Porto, Portugal, examining how atmospheric particles can adsorb polycyclic aromatic hydrocarbons (PAHs) and other pollutants, raising concern about daily human exposure to microplastics carrying potentially carcinogenic compounds that may accumulate in blood, lungs, and brain tissue.
Characterization of atmospheric particles: A study of particulate matter and microplastic in the Region of Hortênsias – Brazil
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This Brazilian study monitored fine and coarse particulate matter (PM2.5 and PM10) in two tourist cities in the Hortênsias region over a year, finding air quality that sometimes fell below WHO standards and detecting particles with characteristics consistent with microplastics alongside vehicular soot. The study raises concerns about airborne microplastic exposure in urban environments even in relatively small cities, and adds to the growing evidence that atmospheric microplastics are a widespread form of air pollution with potential respiratory health implications.
Microplastics in the air of Metro Manila, Philippines: Diurnal and seasonal dynamics and potential health risk
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Researchers measured suspended atmospheric microplastics in Metro Manila, Philippines across both dry and wet seasons and found higher concentrations during the dry season, with levels typically peaking during daytime hours. Temperature was positively associated with airborne microplastic levels, while humidity and rainfall helped reduce concentrations. The study estimates that people in the area could inhale more than 130 microplastic particles per month during the dry season, highlighting the need to include microplastics in air quality monitoring.
Airborne microplastics and fibers in indoor residential environments in Aveiro, Portugal
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Researchers measured airborne microplastics and synthetic fibers inside five homes in Portugal, finding roughly one synthetic particle per cubic meter of indoor air on average, with fibers being the most common type. The study underscores that indoor air is a meaningful route of microplastic inhalation exposure and that better measurement methods are needed to capture the smallest, most breathable particles.
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