Bactericidal Effect of Zero-Valent Iron Nanoparticles on Escherichia coli
University of California, Berkeley · Seoul National University
Abstract
Zero-valent iron nanoparticles (nano-Fe0) in aqueous solution rapidly inactivated Escherichia coli. A strong bactericidal effect of nano-Fe0 was found under deaerated conditions, with a linear correlation between log inactivation and nano-Fe0 dose (0.82 log inactivation/mg/L nano-Fe0 x h). The inactivation of E. coli under air saturation required much higher nano-Fe0 doses due to the corrosion and surface oxidation of nano-Fe0 by dissolved oxygen. Significant physical disruption of the cell membranes was observed in E. coli exposed to nano-Fe0, which may have caused the inactivation or enhanced the biocidal effects of dissolved iron. The reaction of Fe(II) with intracellular oxygen or hydrogen peroxide also…
Citation impact
- FWCI
- 15.48
- Percentile
- 100%
- References
- 36
Authors
6- CLChangha LeeCorresponding
University of California, Berkeley, Seoul National University
- JYJee Yeon Kim
University of California, Berkeley, Seoul National University
- WIWon Il Lee
Seoul National University, University of California, Berkeley
- KLKara L. Nelson
Seoul National University, University of California, Berkeley
- JYJeyong Yoon
Seoul National University, University of California, Berkeley
Topics & keywords
- Zerovalent iron
- Hydrogen peroxide
- Chemistry
- Escherichia coli
- Oxygen
- Aqueous solution
- Reactive oxygen species
- Nanoparticle
- Clean water and sanitation