Nature Study Finds Microplastics Generate Reactive Molecules in Water, Challenging Inertness
Updated
Updated · Columbia University · Oct 15
Nature Study Finds Microplastics Generate Reactive Molecules in Water, Challenging Inertness
3 articles · Updated · Columbia University · Oct 15
Summary
Researchers at Columbia and UC Berkeley reported in Nature that microplastics and nanoplastics can react with surrounding water to generate highly reactive radicals, offering a possible mechanism for biological harm.
As larger plastics fragment, their surface area rises sharply, creating more plastic-water interfaces where electron transfer can occur and hydroxyl radicals can form.
The finding matters for health because blood and cells are water-rich environments, suggesting particles that enter the body may remain chemically active rather than inert.
The study helps explain earlier evidence linking microplastic exposure to disease and follows a 2024 finding that 1 liter of bottled water contained about 240,000 detectable plastic fragments.
The work could guide redesigns of common plastics and emission controls, while U.S. agencies have already elevated microplastics as a public-health concern, including a $144 million federal program.