Tamarind powder removes microplastics: three Asian teens win Earth Prize

Three teenagers in India turned a common kitchen ingredient into a low-cost fix for one of the planet’s most pervasive pollutants. Their powder clumps invisible microplastic particles into magnet-attracting masses, offering a practical way to clean stored drinking water where advanced filtration isn’t available.

The invention — a biodegradable tamarind seed formula called “Plas-Stick” — has won the trio recognition as Asia winners of The Earth Prize 2026 and brought funding to help scale the idea across rural communities.

How tamarind seed became a tool to remove microplastics

Students Vivaan Chhawchharia, Ariana Agarwal, and Avyana Mehta, all 16, experimented with powdered tamarind seed and discovered it acts as a natural flocculant. After stirring the powder into contaminated water for a short time, tiny plastic fragments bind together into clumps that can be lifted out using a simple handheld magnet.

Plas-Stick was designed for situations where people share open water containers and don’t have access to electricity or complex filters. The ingredients are locally available across South Asia and the process is straightforward enough for community-level deployment.

Why this matters: the scale and risk of microplastic contamination

Microplastics are now detected almost everywhere scientists look — from the highest mountain peaks to the deepest ocean trenches. These particles, some thinner than a human hair by hundreds of times, have been found inside human organs, including the brain and placenta, and are linked to hormonal disruption.

• Global water access gap: More than 2.2 billion people lack reliably managed drinking water, increasing reliance on stored water that can contain microplastics.
• Health concerns: While the long-term effects are still being studied, microplastics are known to carry chemical contaminants and interfere with endocrine systems.

How Plas-Stick works and what makes it practical

The team optimized the tamarind seed powder to act as a binder that adheres to microplastic particles. The treatment requires no power source and produces biodegradable waste, which can be disposed of safely. The basic procedure the students envision includes:

1. Adding a measured amount of powder to the water container.
2. Agitating or stirring for a short period to allow particles to clump.
3. Using a magnet-equipped tool to lift the clumped microplastics from the surface.
4. Disposing of the collected residue in an environmentally responsible way.

Key advantages include affordability, ease of use, and compatibility with decentralized, community-led distribution — all critical features for rural areas and low-resource settings.

From classroom research to regional rollout plans

The idea grew out of environmental science coursework and field observations in rural communities, where the students noted how water is often stored collectively without reliable filtration. With backing from The Earth Prize, they plan to build decentralized production hubs to manufacture and distribute Plas-Stick across India.

Steps the team will take to expand access

• Set up small-scale manufacturing centers close to target communities.
• Train local users and school programs in safe application and disposal.
• Run pilot studies to measure effectiveness and monitor health outcomes.

Winning The Earth Prize brought both recognition and seed funding — a cash award intended to help the students move beyond pilot trials and reach more villages and schools. In a statement after the announcement, the trio said the award validates the invisible but widespread problem affecting many people every day and allows them to scale a solution meant to be simple, affordable and accessible.

The Earth Prize and youth-led climate innovation

The Earth Prize is administered by The Earth Foundation, a Geneva-based nonprofit that emerged from the School Strike for Climate movement in 2019. The competition is aimed at channeling young people’s climate concerns into practical projects by supporting student teams with mentorship, funding, and pathways to implementation.

As teenagers increasingly report anxiety about environmental futures, initiatives like The Earth Prize are designed to transform that worry into tangible inventions that address community-level problems — from water safety to waste reduction and beyond.

You might also like:

• Microplastics in tap water filtered by miracle tree seeds, removing more than 98%
• Seed bank’s 25-year collection safeguards plant species from extinction
• Scientists discover a massive ocean 700 km beneath Earth’s surface
• Seed vault in Atacama Desert frozen to preserve Chile’s plant diversity
• NASA: Earth is getting darker and what it means for the future

Michael Thompson

Michael Thompson is an experienced journalist covering U.S. and global news. With ten years on the front lines, he breaks down political and economic stories that matter. His precise writing and keen attention to detail help you grasp the real‑world impact of every event.