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A Common Plant That Grows In Your Backyard Could Be The Answer To Microplastics In Drinking Water

Scientists in Brazil have discovered that seeds from the moringa tree, a plant native to India that grows widely across the tropics and is already consumed as food in many parts of the world, can remove microplastics from drinking water as effectively as the industrial chemical currently used to treat water supplies. Microplastics, tiny fragments of plastic that have made their way into tap water, rivers, and groundwater around the world, are an increasingly urgent public health concern, and existing treatment methods rely on aluminum sulfate, a synthetic coagulant that is not biodegradable and leaves behind chemical residues. The moringa seed extract works by neutralizing the electrical charge that causes plastic particles to repel each other, causing them to clump together into larger clusters that can then be filtered out, and in tests involving water with higher alkalinity it actually outperformed the chemical alternative. The research was published in the journal ACS Omega.

What makes the finding especially significant is its potential for communities that lack access to industrial water treatment infrastructure. Moringa trees grow readily throughout tropical and subtropical regions, the seeds are inexpensive, and the saline extract used in the study can be prepared at home with basic materials, meaning a natural microplastic treatment could be within reach for small rural communities, farms, and developing regions where chemical-based treatment is impractical or unaffordable. The research team is now testing the method on water drawn from a real river that supplies a major Brazilian city, and early results suggest it holds up under natural conditions as well. Scientists say moringa has been studied for years as a natural water purifier, but the discovery that it works specifically against microplastics opens an entirely new and timely application for a plant that has been quietly growing in backyards around the world for centuries.

Source: https://www.sciencedaily.com/releases/2026/04/260420014735.htm

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