The Controversy Regarding Tamarind to Remove Plastic from H2O - Resolved.
3 Teens Win Earth Prize for Asia Inventing Tamarind Powder That Easily Removes Microplastics using a Magnet.
By Andy Corbley - May 15, 2026
This eco-friendly, low-cost water purification method—notably popularized by the award-winning student innovation project "Plas-Stick" at The Earth Prize 2026—works through a simple three-step chemical and physical process.
Coagulation (Binding): Discarded tamarind seeds are ground into a fine powder infused with magnetic particles.
Flocculation (Clumping): The water is briefly stirred or agitated. The sticky tamarind compounds trap the microplastics, causing them to group together into heavy, visible masses or "clumps".
Magnetic Extraction: A handheld magnet is passed through or over the water. The magnet attracts the magnetic tamarind-microplastic mass, pulling the clumps cleanly out of the fluid and leaving behind safe, filtered water.
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