2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Toxic Heavy Metal Ions Removal from Waste Water by Membrane Filtration of PGA-based Nanoparticles

M. Bodnar, I. Hajdu, J.F. Hartmann, J. Borbely
University of Debrecen, HU

Keywords:
nanoparticles, ultrafiltration, lead removal

Abstract:
Toxic Heavy Metal Ions Removal from Waste Water by Membrane Filtration of PGA-based Nanoparticles M. Bodnar1, I. Hajdu1, J.F. Hartmann2 and J. Borbely1,3 1University of Debrecen, H-4010 Debrecen, Hungary 2Elizanor LLC, Princeton Junction, NJ 08550, USA 3BBS Nanotechnology Ltd., H-4225 Debrecen, Hungary Abstract Polymer enhanced ultrafiltration is a feasible method to remove metal ions from diluted waste water stream. Polyacids are widely investigated for this application. For separation of toxic heavy metal ions, including lead ions synthetic polymers and natural poly gamma glutamic acid (PGA) and other natural polymers have been investigated. In this study formation of nanoparticles of poly-gamma glutamic acid with bivalent metal ions is described. In aqueous solution the size of particles varies in the range of 50 nm to 350 nm depending on the pH. The stable nanoparticles were visualized by TEM measurements. The polyacid has high affinity and binds proportional toxic heavy metal ion. The polymer-lead complex was separated by ultrafiltration and the lead ions were concentrated in the retentate. The biopolymer is useful for treating waste water. Reference M. Bodnár, A. L. Kjoniksen, R. Molnar, J. F. Hartmann, L. Daróczi, B. Nyström and J. Borbély: J. Hazard. Mater., 2007.


Nanotech 2008 Conference Program Abstract