Microplastics are tiny pieces of plastic that pollute water. Researchers at the University of Missouri are testing a new method that uses genetically engineered algae to capture these particles.
The team changed the algae so it produces limonene, a natural oil that makes the algae water-repellent. Because many microplastics are also water-repellent, the algae and plastics come together, form clumps and sink. The clumps make a solid layer that is easier to collect and remove than loose particles.
The engineered algae can grow in wastewater and feed on extra nutrients, helping to clean the water. The researchers say the removed plastics could later be used to make bioplastic products. The study appears in Nature Communications.
Difficult words
- microplastic — very small pieces of plastic in waterMicroplastics
- alga — a simple plant that grows in wateralgae
- limonene — a natural oil from citrus plants
- water-repellent — does not mix with water; stays dry
- clump — a small group of things joined togetherclumps
- wastewater — used water from homes or factories
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Do you think using algae to clean water is a good idea? Why or why not?
- How could the removed plastics be useful later?
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