Microplastic: Difference between revisions
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... As plastics fall apart, the chemicals that went into their manufacture can leak out. These can then combine to form new compounds, which may prove less dangerous than the originals—or more so. A couple of years ago, a team of American scientists subjected disposable shopping bags to several days of simulated sunlight, in order to mimic the conditions that they’d encounter flying or floating loose. The researchers found that a single bag from CVS leached more than thirteen thousand compounds; a bag from Walmart leached more than fifteen thousand.... | ... As plastics fall apart, the chemicals that went into their manufacture can leak out. These can then combine to form new compounds, which may prove less dangerous than the originals—or more so. A couple of years ago, a team of American scientists subjected disposable shopping bags to several days of simulated sunlight, in order to mimic the conditions that they’d encounter flying or floating loose. The researchers found that a single bag from CVS leached more than thirteen thousand compounds; a bag from Walmart leached more than fifteen thousand.... | ||
Microplastics, meanwhile, don’t just leach nasty chemicals; they attract them. “Persistent bioaccumulative and toxic substances,” or PBTs, are a hodgepodge of harmful compounds, including DDT and PCBs. Like microplastics, which are often referred to in the scientific literature as MPs, PBTs are everywhere these days. When PBTs encounter MPs, they preferentially adhere to them. “In effect, plastics are like magnets for PBTs” is how the Environmental Protection Agency has put it. Consuming microplastics is thus a good way to swallow old poisons. | Microplastics, meanwhile, don’t just leach nasty chemicals; they attract them. “Persistent bioaccumulative and toxic substances,” or PBTs, are a hodgepodge of harmful compounds, including DDT and PCBs. Like microplastics, which are often referred to in the scientific literature as MPs, PBTs are everywhere these days. When PBTs encounter MPs, they preferentially adhere to them. “In effect, plastics are like magnets for PBTs” is how the Environmental Protection Agency has put it. Consuming microplastics is thus a good way to swallow old poisons. <ref>Elizabeth Kolbert, "How Plastics Are Poisoning Us" in _The New Yorker_, 26 June 2023 https://www.newyorker.com/magazine/2023/07/03/book-reviews-plastic-waste</ref></blockquote> | ||
= Sources = | = Sources = | ||
Revision as of 20:23, 27 June 2023
Shorthand for decomposed petroplastic.
Snake Oil
This process is taking place all the time, in many different ways. Plastic bags drift into the ocean, where, after being tossed around by the waves and bombarded with UV radiation, they fall apart. Tires today contain a wide variety of plastics; as they roll along, they abrade, sending clouds of particles spinning into the air. Clothes made with plastics, which now comprise most items for sale, are constantly shedding fibres, much the way dogs shed hairs. A study published a few years ago in the journal Nature Food found that preparing infant formula in a plastic bottle is a good way to degrade the bottle, so what babies end up drinking is a sort of plastic soup. In fact, it is now clear that children are feeding on microplastics even before they can eat. In 2021, researchers from Italy announced that they had found microplastics in human placentas. A few months later, researchers from Germany and Austria announced that they’d found microplastics in meconium—the technical term for an infant’s first poop.
... As plastics fall apart, the chemicals that went into their manufacture can leak out. These can then combine to form new compounds, which may prove less dangerous than the originals—or more so. A couple of years ago, a team of American scientists subjected disposable shopping bags to several days of simulated sunlight, in order to mimic the conditions that they’d encounter flying or floating loose. The researchers found that a single bag from CVS leached more than thirteen thousand compounds; a bag from Walmart leached more than fifteen thousand....
Microplastics, meanwhile, don’t just leach nasty chemicals; they attract them. “Persistent bioaccumulative and toxic substances,” or PBTs, are a hodgepodge of harmful compounds, including DDT and PCBs. Like microplastics, which are often referred to in the scientific literature as MPs, PBTs are everywhere these days. When PBTs encounter MPs, they preferentially adhere to them. “In effect, plastics are like magnets for PBTs” is how the Environmental Protection Agency has put it. Consuming microplastics is thus a good way to swallow old poisons. [1]
Sources
- ↑ Elizabeth Kolbert, "How Plastics Are Poisoning Us" in _The New Yorker_, 26 June 2023 https://www.newyorker.com/magazine/2023/07/03/book-reviews-plastic-waste