Reducing Hexavalent Chromium to Trivalent Chromiumwith Zero Chemical Footprint: Borohydride Exchange Resin and a Polymer-SupportedBase

摘要

Aqueous hexavalent chromium, Cr(VI), is rapidly reduced to trivalent chromium, Cr(III), by exposure to (polystyrylmethyl)trimethylammonium borohydride and with Amberlite-supported mild bases in a heterogeneous environment. Post-reaction removal of the insoluble reagents leaves no remediation-based chemical footprint in the source water. Time dependence with stirred and static conditions is discussed.