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Wilfred Chen Chemical and Environmental Engineering University of California, Riverside

NANOTECHNOLOGY APPLICATIONS FOR TREATMENT: COST EFFECTIVE AND RAPID TECHNOLOGIES; SMART MATERIALS OR ACTIVE SURFACE COATINGS. Wilfred Chen Chemical and Environmental Engineering University of California, Riverside. Why Nanomaterials?.

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Wilfred Chen Chemical and Environmental Engineering University of California, Riverside

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  1. NANOTECHNOLOGY APPLICATIONS FOR TREATMENT: COST EFFECTIVE AND RAPID TECHNOLOGIES; SMART MATERIALS OR ACTIVE SURFACE COATINGS Wilfred Chen Chemical and Environmental Engineering University of California, Riverside

  2. Why Nanomaterials? • Ability to manipulate, control and build materials at the atomic and molecular level • Provide novel affinity, capacity, and selectivity because of their unique physical, chemical and biological properties. • Create large structures with new molecular organization that will facilitate recovery

  3. Types of Nanomaterials for Environmental Treatments • 1. Smart modified surfaces or membranes • 2. Nanostructured materials • 3. Molecularly imprinted polymers • 4. Nanoscale Biopolymers

  4. Smart Surfaces or Membranes

  5. Active Membranes for Heavy Metal Removal

  6. Types of modifying peptides poly-L-glutamate or aspartate poly-L-lysine or arginine poly-L-cysteine Ritche et al. ES&T 2001

  7. Metal Chelating Behavior poly-L-lysine or arginine - oxyanion such as As

  8. Results with poly-cysteine membrane

  9. Tunable Surfaces for Biofouling Ista et al. Appl. Environ. Microbiol. 1999

  10. Nanostructured Materials

  11. Poly(amidoamine) Dendrimers Diallo et al. ES&T 1999

  12. Binding properties

  13. Polymeric Nanoparticles Tungittiplakorn et al. Appl. Environ. Microbiol. 2004

  14. Enhance PAH Desorption

  15. Amphiphilic PolyurethaneNanoparticles Kim et al. Journal of Applied Polymer Science 2004 90 nm in size

  16. Enhanced PAH Solubility

  17. PHEMA Beadscontaining N-Methacryloylhistidine Say et al. Macromol. Mater. Eng. 2002

  18. Metal Removal

  19. Molecularly Imprinted Polymers

  20. Atrazine-Imprinted Polymers Cacho et al. Anal Bioanal Chem2002

  21. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 6.89E+05 6.89E+04 6.89E+03 6.89E+02 Imprinted Polymers for Virus Removal Infection Frequency of Spodoptera frugiperda 9 (Sf9) cells Dilution (pfu/mL)

  22. Reactive Polymer Hydrogel for Phosphate Removal Kiofinas et al. ES&T 2003

  23. Efficiency of Removal

  24. Perchlorate Removal Kioussis et al. Journal of Applied Polymer Science 2001

  25. Efficiency of Removal

  26. Fine tune affinity with different binding sequence Fine tune DT by controlling amino acid sequence and no. of repeating unit (VPGXG)n Tunable Biopolymer with Metal-Binding Property Elastin Domain Metal Binding Domain

  27. Plasmid Enzyme Recombinant plasmid Synthetic gene ELP biopolymers Genetic and Protein Engineering Methodology

  28. Metal Removal Recycling DT Cd2+ + Cd2+ Regeneration Cd2+ DT Cd2+

  29. Production of Biopolymers A B C D E Biopolymer Protein yield (mg/3 L) A, Ela38H6 B, Ela58H6 C, Ela78H6 D, Ela78 E, Ela78H12 Ela38H6 289 Ela58H6 295 Ela78H6 Ela78 Ela78H12 207 191 168 Kostal et al. Marcomolecules, 34, 2257-2261, 2001

  30. Hg2+ MerR can serve as a specific mercury binding domain C123 C79 C114 C114 C79 C123 MerR-Hg complex

  31. Selective Binding of Mercury by Ela153-MerR Biopolymer Acidic waste water (pH 4) Kostal et al. ES&T 2003

  32. Acknowledgement R829606 Exploratory Research: Nanotechnology

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