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Lee, Changha
Advanced Redox Technology (ART) Lab
Research Interests
  • Water Treatment, Advanced Oxidation/Reduction, Water Chemistry, Environmental Catalyst

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Bactericidal effect of zero-valent iron nanoparticles on Escherichia coli

Cited 142 times inthomson ciCited 137 times inthomson ci
Title
Bactericidal effect of zero-valent iron nanoparticles on Escherichia coli
Author
Lee, ChanghaKim, Jee YeonLee, Won IlNelson, Kara L.Yoon, JeyongSedlak, David L.
Keywords
SILVER NANOPARTICLES; ANTIBACTERIAL PROPERTIES; ZEROVALENT IRON; WATER; HYDRODECHLORINATION; TRICHLOROETHYLENE; DECHLORINATION; INACTIVATION; NANOIRON; SYSTEM
Issue Date
2008-07
Publisher
AMER CHEMICAL SOC
Citation
ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.42, no.13, pp.4927 - 4933
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·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 may have induced oxidative stress by producing reactive oxygen species. The bactericidal effect of nano-Fe 0 was a unique property of nano-Fe0, which was not observed in other types of iron-based compounds.
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DOI
10.1021/es800408u
ISSN
0013-936X
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UEE_Journal Papers
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