Brewing tea removes lead from water

/? tea bag microplastic: https://www.google.com/search?q=tea+bag+microplastic

There are glass and silver tea infusers.

"Repurposed beer yeast encapsulated in hydrogels may offer a cost-effective way to remove lead from water" https://phys.org/news/2024-05-repurposed-beer-yeast-encapsul...

"Yeast-laden hydrogel capsules for scalable trace lead removal from water" (2024) https://pubs.rsc.org/en/content/articlelanding/2024/su/d4su0...

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"Application of brewing waste as biosorbent for the removal of metallic ions present in groundwater and surface waters from coal regions" (2018) https://www.sciencedirect.com/science/article/abs/pii/S22133...

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https://ethz.ch/en/news-and-events/eth-news/news/2024/03/tur... :

> Protein fibril sponges made by ETH Zurich researchers [from whey protein] are hugely effective at recovering gold from electronic waste.