On nanoscale metallic iron for groundwater remediation
2010 | journal article. A publication with affiliation to the University of Göttingen.
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Details
- Authors
- Noubactep, C.; Care, Sabine
- Abstract
- This communication challenges the concept that nanoscale metallic iron (nano-Fe(0)) is a strong reducing agents for contaminant reductive transformation. It is shown that the inherent relationship between contaminant removal and Fe(0) oxidative dissolution which is conventionally attributed to contaminant reduction by nano-Fe(0) (direct reduction) could equally be attributed to contaminant removal by adsorption and co-precipitation. For reducible contaminants, indirect reduction by adsorbed Fe(II) or adsorbed H produced by corroding iron (indirect reduction) is even a more probable reaction path. As a result, the contaminant removal efficiency is strongly dependent on the extent of iron corrosion which is larger for nano-Fe(0) than for micro-Fe(0) in the short term. However, because of the increased reactivity, nano-Fe(0) will deplete in the short term. No more source of reducing agents (Fe(II), H and H(2)) will be available in the system. Therefore, the efficiency of nano-Fe(0) as a reducing agent for environmental remediation is yet to be demonstrated. (c) 2010 Elsevier By. All rights reserved.
- Issue Date
- 2010
- Status
- published
- Publisher
- Elsevier Science Bv
- Journal
- Journal of Hazardous Materials
- ISSN
- 0304-3894