1 / 10

Enhancing Contaminant Remediation with Oxidants: A Spring Celebration of Innovations

Join us in exploring the latest advancements in oxidative treatment technologies for effective contaminant remediation. Led by Dr. David L. Sedlak and a collaborative project team, this initiative focuses on addressing recalcitrant polar contaminants like NDMA and hydrophobic compounds such as PCBs. We investigate the utilization of iron nanoparticles for oxidation and the activation of oxygen during the corrosion process, demonstrating potential for passive treatment applications in soil, groundwater, and drinking water remediation. Learn about our motivations, methods, limitations, and innovative solutions to improve environmental safety.

odele
Télécharger la présentation

Enhancing Contaminant Remediation with Oxidants: A Spring Celebration of Innovations

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spring Celebration Use of Oxidants to Improve Contaminant Remediation David L. Sedlak, Ph.D. sedlak@ce.berkeley.edu http://www.ce.berkeley.edu/~sedlak/

  2. Project Team • David Sedlak (CEE) • Fiona Doyle (MSE) • David Waite (Univ. of New South Wales) • Christy Keenan • Ahn Pham

  3. Oxidative Treatment Technologies • Motivation • Recalcitrant polar contaminants (e.g., NDMA) • Hydrophobic contaminants (e.g., PCBs) • Passive treatment (e.g., As in groundwater)

  4. Oxidative Treatment Technologies • Motivation • Recalcitrant polar contaminants (e.g., NDMA) • Hydrophobic contaminants (e.g., PCBs) • Passive treatment (e.g., As in groundwater) • Limitations • Requires unstable reagents (e.g., H2O2) • Hydroxyl radical is unselective

  5. Fe Nanoparticles as Reductants • Currently used for contaminant reduction Zhang (2003)

  6. Fe Nanoparticles as Oxidants • Oxygen activation during Fe corrosion Fe0(s) Fe2+ Fe0(s) Fe2+ 2H+ H2O H2O2 O2 O22- Fe2+ Fe3+ + OH- . OH- OH . RHR oxid

  7. Oxidation of Molinate by Fe Nanoparticles N2 air Joo et al. (2004) O2

  8. Oxidation of As(III) by Fe • As(III) oxidation and As(V) adsorption Leupin & Hug (2005)

  9. Oxidation of As(III) by Fe • Selective As(III) oxidation Hug and Leupin (2003)

  10. Oxidative Remediation with Iron • Fe can convert O2 into a powerful oxidant • Potential for selective oxidation on surface • Potential applications • Passive treatment barriers • Soil and groundwater treatment • Drinking water treatment

More Related