Microplastics in water aren’t inert and make damaging chemicals on their own
Summary
A study by Columbia University shows that microplastics in water can produce harmful molecules called reactive oxygen species (ROS). These molecules can damage important parts of cells like DNA and proteins, which may explain some health risks linked to microplastics.Key Facts
- Plastics are usually thought to be chemically stable, but tiny plastic particles (microplastics) in water can create reactive oxygen species (ROS).
- ROS are harmful molecules that can damage DNA, proteins, and fats inside living cells.
- The research team tested six common plastics and found all produced ROS, with water-repellent plastics like polyethylene generating the most.
- The interaction between plastics and water changes the structure of water molecules near the plastic surface, making it easier to form ROS.
- The study used methods such as electron spin resonance and fluorescent sensors to detect these reactive molecules directly.
- The research helps explain why microplastics found in human blood and organs might cause harm through oxidative stress.
- Previous doubts about contamination or errors in detecting ROS were addressed by careful testing in this study.
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