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Engineers make filters from tree branches to purify drinking water


Xylem tissue in gymnosperm sapwood can be used for water filtration (as seen on top). Xylem is comprised of conduits that are interconnected by membranes that filter out contaminants present in water (bottom). Credit: N.R. Fuller, Sayo Studio
THE interiors of nonflowering trees such as pine and ginkgo contain sapwood lined with straw-like conduits known as xylem, which draw water up through a tree’s trunk and branches. Xylem conduits are interconnected via thin membranes that act as natural sieves, filtering out bubbles from water and sap.
MIT engineers have been investigating sapwood’s natural filtering ability, and have previously fabricated simple filters from peeled cross-sections of sapwood branches, demonstrating that the low-tech design effectively filters bacteria. ....

Rohit Karnik , Anish Antony , Megha Hegde , Kendra Leith , Krithika Ramchander , Amy Smith , Nature Communications , Department Of Mechanical Engineering , Luda Wang , Mechanical Engineering , ரோஹித் கார்நிக் , ஆநிஶ் ஆண்டனி , மேகா ஹெக்டே , கென்ற லீத் , கிருத்திகா ராம்சந்தர் , ஆமி ஸ்மித் , இயற்கை தகவல்தொடர்புகள் , துறை ஆஃப் இயந்திர பொறியியல் , இயந்திர பொறியியல் ,