What are microplastics?
Microplastics generally refer to plastic particles between 0.33 mm and 5 mm in size [1]. Microplastics can come from a variety of sources, including microbeads from personal care products; fibers from synthetic clothing; pre-manufactured granules and powders; and fragments that degrade from larger plastic products. These smaller plastic particles can be ingested by aquatic organisms. ACC's Plastics Division and its member companies work to better understand the potential role of microplastics in the marine environment.
Multiple studies have shown that microplastics in the marine environment can absorb persistent organic pollutants (POPs).
Microplastics are small in size, but have a very large specific surface area, and have a strong ability to adsorb pollutants in the environment. Why is this?
Specific surface area refers to the total area possessed by a unit volume of material. Assuming that the microplastic is a cube, it is continuously cut, but the total volume remains unchanged. It can be found that the smaller the microplastic is cut, the larger the total contact area. The larger the contact area, the more adsorption sites, and the larger the adsorption capacity, so the microplastics have strong adsorption.
Why are microplastics bad?
We've known for years that microplastics are problematic, but a growing body of research continues to highlight just how much they affect the environment and our health. Microplastics are extremely persistent, which means it is nearly impossible to remove them from the environment in which they accumulate. Because of their persistence and the chemicals that make them up, research suggests they can be very harmful to the organisms they come into contact with, including causing reduced feeding, poisoning, and increased mortality. They also tend to facilitate the transfer of contaminants along the food chain, with potentially serious consequences for human health. Scientists warn that the situation is out of control. They found microplastics almost everywhere they looked: on mountains, in the ocean, in Arctic sea ice, and in our air, drinking water and bodies.
Where exactly do microplastics come from?
On the one hand, there is plastic waste, which is formed by physical, chemical and biological decomposition, which is secondary microplastics. Another major source is the friction particles such as polyethylene and polypropylene added in our daily use of toiletries, such as facial cleansers, toothpaste, and scrubs, which are primary microplastics. There may be more than 300,000 plastic microbeads in just one scrub. Microplastics eventually flow into the sea continuously. It is estimated that the amount of sediments on the seabed around the world has reached tens of millions of tons. It is imperative to control microplastics!
How to reduce microplastics?
Wastewater and drinking water treatment is very effective in removing microplastics. Research, albeit limited, has shown that they can remove more than 90 percent of microplastics.
But there is also a lot that individuals can do to reduce microplastics. Perhaps the most important step is to change the way we think and behave.
Modern lifestyles are full of single-use plastic items such as straws and cups. People think we use plastic cutlery for an average of three minutes at a time, but it remains in the environment for hundreds of years. Single-use plastics, including food packaging, are also one of the biggest contributors to plastic pollution.
Thinking about how plastic is made and what happens to it after it's used makes a difference.
"We need to ask ourselves if we really need to use certain types of plastic, like disposable forks," Alex said. "If we do, we need to question how we are responsible for it and how we can best handle it. It only takes a few seconds.
'An example of this is accidental littering. People might throw garbage into a full bin thinking they've done their part and the garbage collectors will take it from there, but all it takes is a gust of wind to blow it down and you've got Garbage everywhere. So while it may be well-intentioned, it is not a responsible disposal.
"Responsible disposal may be that you end up taking your rubbish home so you can properly recycle it. Every situation and individual is different.
