The tree seed that scrubs plastic from drinking water

By Earth to Sea News · July 2026

Crush a seed, clean a glass: nature's own water filter just aced its exam.

The moringa tree has been called a miracle for centuries, its pods and leaves feeding millions across the tropics. Now researchers at Sao Paulo State University have measured a new talent. Proteins in its crushed seeds act like tiny magnets for microplastics, gathering the invisible fragments into clumps big enough to simply filter away. In tests on tap water the seed extract removed about 98.5 per cent of microplastic particles, matching the industrial chemical that treatment plants rely on today.

The seeds even outperformed the chemical in alkaline water and kept working across a wider range of conditions, all from a tree that grows readily in the warm parts of the world, including northern Australia. This is early, lab scale work, and treatment plants will not retool overnight. But the promise glows: a natural, biodegradable water cleaner that communities could grow on their own doorstep, setting one of our newest pollution worries before one of the oldest trees we know. Published in April, reported around the world within days.