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

poly-L-glutamate or aspartate

poly-L-lysine or arginine

poly-L-cysteine

Ritche et al. ES&T 2001

metal chelating behavior
Metal Chelating Behavior

poly-L-lysine or arginine - oxyanion such as As

tunable surfaces for biofouling
Tunable Surfaces for Biofouling

Ista et al. Appl. Environ. Microbiol. 1999

poly amidoamine dendrimers
Poly(amidoamine) Dendrimers

Diallo et al. ES&T 1999

polymeric nanoparticles
Polymeric Nanoparticles

Tungittiplakorn et al. Appl. Environ. Microbiol. 2004

amphiphilic polyurethane nanoparticles
Amphiphilic PolyurethaneNanoparticles

Kim et al. Journal of Applied Polymer Science 2004

90 nm in size

phema beads containing n methacryloylhistidine
PHEMA Beadscontaining N-Methacryloylhistidine

Say et al. Macromol. Mater. Eng. 2002

atrazine imprinted polymers
Atrazine-Imprinted Polymers

Cacho et al. Anal Bioanal Chem2002

imprinted polymers for virus removal
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)

perchlorate removal
Perchlorate Removal

Kioussis et al. Journal of Applied Polymer Science 2001

tunable biopolymer with metal binding property
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

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Plasmid

Enzyme

Recombinant

plasmid

Synthetic gene

ELP biopolymers

Genetic and Protein Engineering Methodology

metal removal1
Metal Removal

Recycling

DT

Cd2+

+

Cd2+

Regeneration

Cd2+

DT

Cd2+

production of biopolymers
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

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Hg2+

MerR can serve as a specific mercury binding domain

C123

C79

C114

C114

C79

C123

MerR-Hg complex

selective binding of mercury by ela153 merr biopolymer
Selective Binding of Mercury by Ela153-MerR Biopolymer

Acidic waste water (pH 4)

Kostal et al. ES&T 2003

acknowledgement
Acknowledgement

R829606

Exploratory Research: Nanotechnology

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