Plant-based filter removes up to 99.9% of microplastics from water

"To create bioCap, the researchers used sawdust as a substrate through which to filter water, given its superior chemical and physical stability and the fact that it contains cellulose, hemicelluloses, and lignin, which facilitate efficient water transport. They modified the sawdust by adding tannic acid, a naturally occurring plant polyphenol found in almost all plants without underground root systems."