Hydrogen Peroxide Production in the Presence of Soot and Biological Electron Donors
Document Type
Oral Presentation
Campus where you would like to present
SURC Ballroom B/C/D
Start Date
21-5-2015
End Date
21-5-2015
Keywords
Soot, Nanoparticle, Hydrogen Peroxide
Abstract
The detrimental effects of carbonaceous nanoparticles emitted from fuel combustion are well known, but their underlying chemical mechanisms are not. Particle toxicity is generally thought to stem from the in vivo production of reactive oxygen species (ROS), but the details remain tenuous. Here, experiments were carried out to investigate the production of hydrogen peroxide (H2O2), an ROS, as a function of soot characteristics and redox-active iron content in the presence of biological electron donors. At biologically representative concentrations, results show that the presence of soot is essential in the continuous production of H2O2 at concentrations on the order of hundreds of nM and that a small redox-active pool of iron may be responsible for the conversion of H2O2 to a more potent ROS, hydroxyl radical (OH). Further investigation on the role of particle characteristics is underway. Data from this study are likely to lead to a better understanding of the reactivity and transformation of carbonaceous particles in a variety of settings.
Recommended Citation
Barnes, Jeff, "Hydrogen Peroxide Production in the Presence of Soot and Biological Electron Donors" (2015). Symposium Of University Research and Creative Expression (SOURCE). 23.
https://digitalcommons.cwu.edu/source/2015/posters/23
Poster Number
29
Department/Program
Chemistry
Additional Mentoring Department
Chemistry
Additional Mentoring Department
Chemistry
Hydrogen Peroxide Production in the Presence of Soot and Biological Electron Donors
SURC Ballroom B/C/D
The detrimental effects of carbonaceous nanoparticles emitted from fuel combustion are well known, but their underlying chemical mechanisms are not. Particle toxicity is generally thought to stem from the in vivo production of reactive oxygen species (ROS), but the details remain tenuous. Here, experiments were carried out to investigate the production of hydrogen peroxide (H2O2), an ROS, as a function of soot characteristics and redox-active iron content in the presence of biological electron donors. At biologically representative concentrations, results show that the presence of soot is essential in the continuous production of H2O2 at concentrations on the order of hundreds of nM and that a small redox-active pool of iron may be responsible for the conversion of H2O2 to a more potent ROS, hydroxyl radical (OH). Further investigation on the role of particle characteristics is underway. Data from this study are likely to lead to a better understanding of the reactivity and transformation of carbonaceous particles in a variety of settings.
Faculty Mentor(s)
Anne Johansen, Dan Hinz