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Sources of Microplastics in the Environment and Human Exposure Routes: A Review
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Researchers reviewed the major sources of environmental microplastic pollution — dominated by textiles, tires, and urban dust — and catalogued the primary human exposure routes via food, inhalation, and skin contact, noting that airborne MPs are an underestimated risk because fine particles can bypass respiratory defenses and penetrate deep into the lungs.
In this study, the sources of microplastics in the environment, the ways of human exposure to microplastics, how to deal with them, and the policies and laws of different countries in this regard are discussed. Most of the microplastic pollution comes from textiles, tires and urban dust, which make up more than 80% of the microplastics in the environment. The human body is exposed to microplastics through eating food containing microplastics, inhaling microplastics in the air, and skin contact with these particles in products, textiles, or in dust. The main route of human exposure to microplastic particles in human diet is food and drink. Microplastics can enter food during food processing, storage, transportation and packaging process. Airborne microplastics are an underestimated hazard, potentially reaching deep into human lungs because they can pass through the defensive respiratory system. Humans may also be exposed to microplastics through skin contact, following the atmospheric fallout, in this case hair follicles, sweat glands or damaged skin are all ways of entry. Some researchers have suggested burning plastics and recovering the resulting energy. Nevertheless, plastic recycling is considered a more efficient solution because this method reduces the amount of plastic waste produced as opposed to burning.
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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.