What Are Microplastics and Where Are They Found?
Microplastics are plastic fragments that are usually 5mm or less, in size and can be found in various environments such as oceans and soil as well as in the air we breathe. They originate from sources like the decomposition of plastic debris, synthetic fibers from clothing, and tiny beads used in personal care items. According to the Plastic Soup Foundation (2019) because of their size microplastics pose a challenge to remove from water systems, resulting in contamination concerns.
Microplastics are commonly divided into secondary categories based upon their origins and characteristics. Primary microplastics are intentionally produced at a scale, for applications such as cosmetics and industrial uses. On the other hand, secondary microplastics are created as larger plastic items break down over time due to a processes involving weathering, exposure to wildlife and mechanical wear (EPA, 2018). This breakdown leads to the presence of these particles in a range of environments including deep sea sediments and Arctic regions. They have even been detected in tissues and organs which underscores the impact of microplastic pollution.
How Do Microplastics Enter the Environment?
Microplastics find their way into the environment through routes. With a significant source being waste that breaks down over time from being exposed to nature's elements like sunlight and physical forces such as wind and water erosion. An example of this process is how discarded plastic bottles and bags gradually fragment into particles through a combination of sunlight exposure (photodegradation) and natural wear and tear. Another key contributor to pollution is clothing that sheds minuscule fibers during laundry cycles. These fibrous particles are too small for sewage treatment facilities to capture as a result they end up in our rivers and oceans as per EPA report of 2018.
Moreover pollution from operations also plays a role in the issue of microplastics. Plastic manufacturing plants emit plastic particles and dust into the environment. Another major contributor is tire abrasions from vehicles. Tiny plastic pieces from tires gather on road surfaces and are carried into water bodies by rainfall (Plastic Soup Foundation, 2019). With origins microplastics have pervaded ecosystems, food sources, and even human beings bodies, to an extent that avoiding them has become extremely challenging.
Why Are Microplastics Problematic?
Tiny pieces of plastic known as microplastics present dangers to health and the ecosystem alike. These minuscule particles can be inhaled due to their size and can gather in organs and tissues over time. Studies indicate that microplastics measuring than 100 nanometers have the ability to reach the brain; particles smaller than 20 microns can make their way into crucial organs; and those below 150 microns can access the lymphatic system (Plastic Soup Foundation, 2019).The lasting impacts, on health from exposure to microplastics are still uncertain. However, studies in their stages suggest connections to inflammation, disruptions in the immune system, and hormonal changes (EPA,2018).
One major worry regarding microplastics is the risk of carrying chemicals within them. Plastics frequently have substances, like phthalates, bisphenol A and flame retardants, which may seep out and disrupt functions. These substances have been linked to imbalance reproductive problems and developmental abnormalities according to the Plastic Soup Foundation report in 2019. Furthermore tiny particles of plastic have the ability to soak up and carry substances such as persistent organic pollutants (POPs). These pollutants can enter the food chain through marine creatures that ingest the microplastics (EPA, 2018)..
Environmental Impact of Microplastics
Microplastics pose a threat to both marine and land ecosystems as they have harmful effects across various organisms and food chains in the oceans and beyond (EPA, 2018). Research indicates that these tiny plastic particles can negatively impact feeding habits and reproductive abilities of species while also hindering their growth potential, this detrimental cycle ultimately results in a decline in biodiversity levels. As an illustration of this issue in action, seabirds and fish are at risk of ingesting microplastics that can fill their stomachs and contribute to malnutrition or even starvation over time.
Microplastics, on land can pollute soil and farms by using plastic fertilizers and breaking down plastic mulch films which may harm soil life and plants according to the Plastic Soup Foundation in 2019 study findings. Harmful microplastics have also been found in tap water and bottled water as in the air raising worries about their impact, on human food and water sources. .
Mitigation and Solutions
Consumers can have an impact too on lessening pollution by taking simple steps like opting for reusable bags and bottles and selecting natural fiber clothing materials as well as fitting washing machine filters to trap microfibers effectively. These actions can contribute significantly to the cause while also backing businesses that prioritize eco packaging and production methods to drive change in the industry (Plastic Soup Foundation report, from 2019).
Microplastics represent an invisible but pressing environmental threat, permeating ecosystems and human bodies alike. As their presence continues to grow, understanding the sources and impacts of microplastic pollution is essential for developing effective solutions. While further research is needed to determine the full extent of their health effects, immediate action is necessary to mitigate their spread. Through policy changes, industry shifts, and individual efforts, we can work toward reducing microplastic contamination and protecting both human health and the environment.
References
EPA. (2018). Municipal Solid Waste in the United States. U.S. Environmental Protection Agency.
Plastic Soup Foundation. (2019). The Microplastic Problem: Health and Environmental Risks.
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