if you throw Washing a polyester sweatshirt in the washing machine will not restore its original appearance. The agitation breaks up the plastic microfibers, which the machine flushes into the wastewater treatment plant. Unfiltered particles are discharged into the sea. Like other forms of microplastics (broken bottles and bags, paint shards, pellets known as nurdles), microfiber pollution in the ocean reflects the exponential growth of plastic production. According to the World Economic Forum, output could he triple by 2050 from 2016 levels.
A new analysis provides the most comprehensive quantification yet of how much this material pollutes the surface of the ocean. An international team of researchers calculates that there are between 82 trillion and 358 trillion plastic particles (2.4 billion to 10.8 billion pounds total) floating around the world, but only on top of ocean water. .
And microplastics are getting much smaller, and their numbers can be much higher, but we’re only counting bits to a third of a millimeter long. (Microplastics are defined as particles less than 5 mm in length.) Scientists are now NanoPlastics in the environment are small enough to penetrate cells, measured on the millionth-of-a-meter scale, but tabulating them remains difficult and costly. If this new study had taken into account the smallest plastics, the number of ocean particles would no longer be in the trillions. Co-author Scott Coffin said, ‘We’re talking about the number of Kyo. Probably not more.’ PLoS ONE.
“It’s the elephant in the room,” agrees Marcus Eriksen, co-founder of the 5 Gyres Institute and lead author of the study. “If you’re going to talk about the number of particles out there, we’re not looking at nanoscale particles. And that’s really in line with all the research on human health effects.” has just begun to study these effects, but has already found that the smallest microplastics can easily move through the body, appearing in the blood, intestines, lungs, placenta, and even the first faeces of an infant.
Eriksen and Coffin did the quantification by collecting a previous set of data on plastic samples from oceans around the world. They combined this with data they collected during their own ocean expeditions. Overall, the researcher used nearly 12,000 plastic particle concentration samples from his 1979 to 2019. This allowed us to calculate not only how many could be present, but how their concentrations changed over time.
They found that the particle number fluctuated between 1990 and 2005. This may be due to the effectiveness of international agreements, such as the 1988 regulation limiting plastic pollution from ships. “This is the first time we have any evidence that these international conventions on plastic pollution are actually effective,” says Coffin.
