Tantalum has no known biological function. Escherichia coli cells can preferentially accumulate tantalum ions and leave niobium ions in solution (Fisel et al, 1971).

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Fisel S, Topala N, Tintaru V. Concentration and separation with microbiological collectors. Niobium and tantalum separation with Escherichia coli. Lucr Conf Nat Chim Anal., 3rd. 1971;4:425-30.


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