Engineered Algae Pull Microplastics From Water

Scientists say they have turned algae into a microplastic trap, opening a new front in the fight over polluted drinking water.

According to the research summary, the team developed a special kind of algae that can latch onto microscopic plastic particles almost like a magnet. The key is limonene, an orange-scented oil the algae produce, which helps them bind to water-repelling microplastics. Once attached, the particles gather into clumps that should prove easier to remove from water supplies.

Researchers say the modified algae can both capture microplastics and clean wastewater at the same time.

That two-for-one effect gives the work its edge. Reports indicate the algae do more than grab stray plastic: they also help clean wastewater while they grow. That matters because microplastics have spread far beyond oceans and now show up in rivers, treatment systems, and drinking water, pushing researchers to find methods that work without adding complex new infrastructure.

The approach stands out because it leans on biology rather than brute-force filtration alone. Instead of chasing tiny particles one by one, the algae appear to pull them together into larger masses that treatment systems could potentially skim or filter out more easily. Sources suggest that could lower the difficulty of removing some of the smallest plastic fragments, which often slip through conventional processes.

The next test will come outside the lab. Researchers now need to show that the algae perform reliably in real treatment conditions and at useful scale. If that happens, the idea could matter well beyond one experiment: utilities and wastewater systems need practical tools for a pollution problem that keeps getting smaller, harder to catch, and more common in the water people use every day.