2008 Joint Annual Meeting (5-9 Oct. 2008): Ionic Strength Effects on Selenite Reduction Kinetics by Elemental Iron.

580-3 Ionic Strength Effects on Selenite Reduction Kinetics by Elemental Iron.



Monday, 6 October 2008
George R. Brown Convention Center, Exhibit Hall E
Donglin Huang and Louis M. McDonald, Plant & Soil Sciences, West Virginia University, PO Box 6108, Morgantown, WV 26506
Zero valent iron has been used to treat a number of organic and inorganic contaminants, including selenium. Oxidized selenium forms, selenite and selenate, are removed from solution by reduction to elemental selenium and/or sorption to iron corrosion products. Using steel wool as an inexpensive source of elemental iron, we have shown that selenite reduction proceeds in two steps, a relatively long lag phase the length of which is strongly dependent on ionic strength, followed by rapid removal of selenium from solution.