US Patent Number
An apparatus providing for metal ion/nitrate entrapment comprises a chemically activated, microfiltration, composite polymer and silica-based membrane including a polyamino acid attached thereto through reaction of a terminal amine group of the polyamino acid with the membrane. A method for preparing such a chemically activated or polyamino acid functionalized membrane includes the steps of permeating the silica-based membrane with a solution of silane and a solvent so as to react methoxy groups of the silane with silanol groups of the membrane to incorporate epoxide groups and attaching a polyamino acid to the membrane by reacting a terminal amine group of the polyamino acid with one of the epoxide groups on the membrane.
University of Kentucky Research Foundation, Lexington, KY (US)
Bhattacharyya, Dibakar; Ritchie, Stephen M.; Bachas, Leonidas G.; Hestekin, Jamie A.; and Sikdar, Subhas K., "Silica-Based Membrane Sorbent for Heavy Metal Sequestration" (2001). Chemical and Materials Engineering Faculty Patents. 7.