Fig. 1
From: Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater
Critical metals in seawater and extraction systems. a Estimated ratio of the amounts of selected critical metals in the oceans to the terrestrial reserves49. b Adsorption kinetics of vanadium, uranium, iron, and copper by typical polyamidoxime adsorbents after 56 days of contact with seawater (Sequim Bay, USA) in flow-through columns7. c Schematic depiction of a small subsection of the polyamidoxime fiber. d Cartoon representation of vanabin2 with the highlighted amino acid residues participating in vanadium binding12,50
