The plastic didn’t disappear—it went invisible and spread everywhere.
Royal Netherlands Institute for Sea Research
Scientists have uncovered something surprising in the Atlantic Ocean. The majority of plastic pollution may no longer be visible at all. Instead, it exists as nanoplastics, particles so small they are measured in billionths of a meter.
"This estimate shows that there is more plastic in the
form of nanoparticles floating in this part of the ocean than there is in
larger micro- or macroplastics floating in the Atlantic or even all the world's
oceans!" said Helge Niemann, researcher at NIOZ and professor of
geochemistry at Utrecht University. In mid-June, he received a 3.5 million euro
grant to further investigate nanoplastics and what ultimately happens to them.
Ocean Expedition Reveals Tiny Plastic Particles
To gather data, Utrecht master's student Sophie ten
Hietbrink spent four weeks aboard the research vessel RV Pelagia. The ship
traveled from the Azores to the European continental shelf, where she collected
water samples at 12 different locations.
Each sample was carefully filtered to remove anything larger
than one micrometer. What remained contained the smallest particles. "By
drying and heating the remaining material, we were able to measure the
characteristic molecules of different types of plastics in the Utrecht
laboratory, using mass spectrometry," Ten Hietbrink explains.
First Real Estimate of Ocean Nanoplastics
Previous studies had confirmed that nanoplastics existed in
ocean water, but no one had been able to calculate how much was actually there.
This research marks the first time scientists have produced a meaningful
estimate.
Niemann notes that this breakthrough was made possible by
combining ocean research with expertise from atmospheric science, including
contributions from Utrecht University scientist Dusân Materic.
27 Million Tons of Invisible Plastic
When the team scaled their measurements across the North
Atlantic, the results were striking. They estimate that about 27 million tons
of nanoplastics are floating in this region alone.
"A shocking amount," Ten Hietbrink says. The
finding may finally explain a long-standing mystery. Scientists have struggled
to account for all the plastic ever produced. Much of it appeared to be
missing. This study suggests that a large share has broken down into tiny
particles that are now suspended throughout the ocean.






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