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Tea bag

Brewing tea removes lead from water

February 24, 2025 – from Northwestern Now
In a new study, Northwestern University researchers demonstrated that brewing tea naturally adsorbs heavy metals like lead and cadmium, effectively filtering dangerous contaminants out of drinks. Heavy metal ions stick to, or adsorb to, the surface of the tea leaves, where they stay trapped.
Coral Sponges

This sponge soaks up pollutants but saves valuable minerals

February 5, 2025 – from Northwestern Now
The sponge, coated with nanoparticles that have an affinity for pollutants, can collect metals like zinc and copper, as well as phosphate, and in previous iterations has successfully pulled lead from water, and microplastics and oil from lakes and oceans.