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American Focus > Blog > Tech and Science > Nanoplastics Make Up Most of the Ocean’s Plastic Pollution
Tech and Science

Nanoplastics Make Up Most of the Ocean’s Plastic Pollution

Last updated: July 10, 2025 8:35 pm
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Nanoplastics Make Up Most of the Ocean’s Plastic Pollution
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Plastic pollution in the ocean is a well-known problem that often captures media attention with images of marine life suffocating on plastic debris or plastic bottles washing up on shorelines. However, recent research has shed light on a more insidious form of plastic pollution: nanoplastics. These tiny particles, smaller than a human hair, have the potential to wreak havoc on marine ecosystems and human health.

A study published in Nature magazine reveals the alarming presence of nanoplastics in the North Atlantic Ocean. Researchers found three types of nanoplastics—polyethylene terephthalate (PET), polystyrene (PS), and polyvinylchloride (PVC)—at an average concentration of 18 milligrams per cubic meter. This translates to a staggering 27 million metric tons of nanoplastics spread across just the top layer of the North Atlantic. These nanoparticles are so small that they can pass through cell walls and enter the food web, posing a significant threat to marine life.

Unlike larger microplastics, nanoplastics behave differently in the marine environment. They do not settle to the bottom of the ocean but are instead distributed throughout the water column. The movement of these particles is driven by Brownian motion and collisions with water molecules, rather than gravity. This unique behavior makes nanoplastics a pervasive and potentially harmful form of plastic pollution.

To detect nanoplastics, researchers used thermal-desorption proton-transfer-reaction mass spectrometry during a research cruise on the vessel Pelagia. Surprisingly, the study found that a major class of plastics, polyethylene (PE), was missing from the data. This suggests that PE nanoplastics may undergo rapid chemical alteration or mineralization, or sink to the sea bed, creating a complex pathway for plastic pollution in the ocean.

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The widespread presence of nanoplastics highlights the urgent need for action to mitigate plastic pollution. A legally binding United Nations treaty on plastics pollution is currently under negotiation, with discussions focused on limiting future plastic production. Environmental scientists emphasize the importance of reducing plastic production to prevent further release of nanoplastics into the environment.

In conclusion, the discovery of nanoplastics in the North Atlantic Ocean underscores the need for global cooperation to address plastic pollution. By taking decisive action to reduce plastic production and implement sustainable waste management practices, we can protect marine ecosystems and safeguard human health from the harmful effects of nanoplastics.

TAGGED:NanoplasticsOceansPlasticPollution
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