NANOTECHNOLOGY APPLICATIONS FOR TREATMENT: COST EFFECTIVE AND RAPID TECHNOLOGIES; SMART MATERIALS OR...
This presentation is the property of its rightful owner.
Sponsored Links
1 / 33

Wilfred Chen Chemical and Environmental Engineering University of California, Riverside PowerPoint PPT Presentation


  • 54 Views
  • Uploaded on
  • Presentation posted in: General

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?.

Download Presentation

Wilfred Chen Chemical and Environmental Engineering University of California, Riverside

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


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

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


Wilfred chen chemical and environmental engineering university of california riverside

Smart Surfaces or Membranes


Active membranes for heavy metal removal

Active Membranes for Heavy Metal Removal


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


Results with poly cysteine membrane

Results with poly-cysteine membrane


Tunable surfaces for biofouling

Tunable Surfaces for Biofouling

Ista et al. Appl. Environ. Microbiol. 1999


Wilfred chen chemical and environmental engineering university of california riverside

Nanostructured Materials


Poly amidoamine dendrimers

Poly(amidoamine) Dendrimers

Diallo et al. ES&T 1999


Binding properties

Binding properties


Polymeric nanoparticles

Polymeric Nanoparticles

Tungittiplakorn et al. Appl. Environ. Microbiol. 2004


Enhance pah desorption

Enhance PAH Desorption


Amphiphilic polyurethane nanoparticles

Amphiphilic PolyurethaneNanoparticles

Kim et al. Journal of Applied Polymer Science 2004

90 nm in size


Enhanced pah solubility

Enhanced PAH Solubility


Phema beads containing n methacryloylhistidine

PHEMA Beadscontaining N-Methacryloylhistidine

Say et al. Macromol. Mater. Eng. 2002


Metal removal

Metal Removal


Wilfred chen chemical and environmental engineering university of california riverside

Molecularly Imprinted Polymers


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)


Reactive polymer hydrogel for phosphate removal

Reactive Polymer Hydrogel for Phosphate Removal

Kiofinas et al. ES&T 2003


Efficiency of removal

Efficiency of Removal


Perchlorate removal

Perchlorate Removal

Kioussis et al. Journal of Applied Polymer Science 2001


Efficiency of removal1

Efficiency of Removal


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


Wilfred chen chemical and environmental engineering university of california riverside

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


Wilfred chen chemical and environmental engineering university of california riverside

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


  • Login