IEC 135 |
| Simone Christie, Civil Engineering, Howard University, 2300 6th Street, Washington, DC 20015, Mamadou Diallo, Materials and Process Simulation Center, Beckman Institute, California Institute of Technology and Howard University, Department of Civil Engineering, Howard University, 2300 6th Street NW, Washington DC, CA 20059, Lajos Balogh, Center for Biologic Nanotechnology, University of Michigan, Ann Arbor, 200 Zina Pitcher Pl, 4010 Kresge-II, Ann Arbor, MI 48109-0533, James H. Johnson Jr., Department of Civil Engineering, Howard University, 2300 6th Street NW, Washington DC, 20059, and William A. Goddard III, Materials and Process Simulation Center, California Institute of Technology, Beckman Institute 139-74, Pasadena, CA 91125. |
| Polyamidoamine (PAMAM) dendrimers are highly branched nanostructures possessing tertiary nitrogen and amide groups arranged in a three-dimensional branched network emanating from a central core. Preliminary experiments have shown that PAMAM dendrimers behave as nanoscale containers for several transition metal ions including Cu(II), Ag(I) and Fe(II). The primary objective of this paper is to demonstrate that PAMAM dendrimers can very effectively remove copper (II) ions from aqueous solutions by utilizing a hybrid complexation-ultrafiltration process. By manipulating the solution pH, copper ions can be retained by the membrane or released for reuse of the ligand. The effects of membrane chemistry and molecular weight cut-off on the effectiveness of removal are also discussed. |
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Nanotechnology and the Environment
5:00 PM-7:00 PM, Tuesday, March 25, 2003 Convention Center -- Hall G, Poster
Sci-Mix
Division of Industrial and Engineering Chemistry |