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Chemical Compositions and Sources of Indoor Airborne PM2.5 at a Middle School in China
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Researchers found that classrooms and labs in a Chinese middle school had air pollution levels above WHO guidelines, with surprisingly high amounts of plasticizer chemicals likely coming off flooring and wall coatings. Since these chemicals can harm reproductive health and kids are especially vulnerable, this suggests schools should rethink materials used indoors to protect student health.
To investigate the indoor air quality on middle school campus in China, PM2.5 samples in a classroom and a laboratory during summer and winter at a y middle school in a coastal city of China were collected and analyzed for their chemical composition and sources. Our results showed that the average winter and summer PM2.5 concentrations in the classroom and the laboratory ranged from 11-24 μg/m³ during the observation periods, which is slightly higher than the WHO recommended value of 10 μg/m³, suggesting a necessary for improving campus indoor air quality. Due to increased window ventilation, a greater outdoor air intrusion in summer led to PM2.5 concentrations in both classroom and laboratory higher in summer than in winter. Moreover, we found that the proportions of Ca²⁺ and Na⁺ in classroom and laboratory PM2.5 were higher than outdoors due to an enhanced indoor dust resuspension. Moreover, the campus indoor PM2.5 contained high levels of phthalate plasticizers, which are several times outdoors, indicating a plasticizer pollution in indoor campus air, which mainly originate from the volatilization of plastic flooring and wall coatings. Since these substances are reproductively toxic and teenagers are vulnerable, reducing the use of such plasticizers is necessary for improving indoor air quality.
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Researchers found tiny plastic particles (microplastics) floating in the air inside schools in Jember, Indonesia, with the highest levels detected in a kindergarten classroom. Most of these particles were tiny plastic fibers, likely coming from things like clothing, dust, and household materials, that kids can easily breathe in every day. Because children breathe faster and have immune systems still developing, this raises questions about the potential health effects of long-term exposure to indoor airborne microplastics—something scientists are still working to fully understand.
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Researchers measured airborne microplastic levels inside and outside a school near a plastics factory in Portugal and found that indoor concentrations were significantly higher than outdoor levels. Six types of plastic polymers were identified in classroom air, along with co-occurring pollutants like phthalates and pesticides. The study estimates daily inhalation exposure for children and highlights that kids may be breathing in microplastics throughout the school day.
Unveiling the hidden pollutants in the indoor environment: Focus on microplastic pollution and its related risks in the educational institutions of megacity, Bangladesh
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Researchers measured microplastic pollution in classroom dust at educational institutions in Dhaka, Bangladesh, finding significant levels of contamination in indoor environments where children spend much of their day. The most common particles were fibers from synthetic textiles, and the concentrations varied based on room type and ventilation. Since children breathe closer to the ground and have developing lungs, this indoor microplastic exposure is a health concern that deserves attention.
Long-term assessment of microplastics in indoor high school air: Abundance, sources, and polymeric analysis
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Researchers monitored airborne microplastic concentrations in indoor high school environments over an extended period, identifying sources and seasonal patterns. Indoor air contained substantial microplastic levels, with textile fibers and outdoor infiltration contributing to persistent classroom air contamination.
Evaluation of particle generation due to deterioration of flooring in schools.
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A simulated school-day experiment tested particle release from different flooring materials under repeated foot traffic, finding that some floor types generate substantial quantities of fine particulate matter, including plastic-containing particles, that may affect indoor air quality for children.
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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.