The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Aging of Iron Nanoparticles in Aqueous Solution: Effects on Structure and Reactivity
Abstract
Aging (or longevity) is one of the most important and potentially limiting factors in the use of nano-Fe 0 to reduce groundwater contaminants. We investigated the aging of Fe H2 (Toda RNIP-10DS) in water with a focus on changes in (i) the composition and structure of the particles (by XRD, TEM, XPS, and bulk Fe 0 content) and (ii) the reactivity of the particles (by carbon tetrachloride reaction kinetics, electrochemical corrosion potentials, and H 2 production rates). Our results show that Fe H2 becomes more reactive between 0 and ∼2 days exposure to water and then gradually loses reactivity over the next few hundred days. These changes in reactivity correlate with evidence for rapid destruction of the original Fe(III) oxide film on Fe H2 during immersion and the subsequent formation of a new passivating mixed-valence Fe(II)−Fe(III) oxide shell. The effect of aging on the rate of carbon tetrachloride reduction was best described by the corrosion potential of Fe H2, whereas the yield of chloroform from this reaction correlated best with the rate of H 2 production. The behavior of unaged nano-Fe 0 in the laboratory may be similar to that in field-scale applications for source-zone treatment due to the short reaction times involved. Long-term aged Fe H2 acquires properties that are relatively stable over weeks or even months.
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Citations
Cites
Nanoscale iron particles for environmental remediation: An overview
Zhang, W.-X. (2003) · Journal of Nanoparticle Research · doi:10.1023/a:1025520116015 · Cited by 2,003
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Chaplin, B. P., Reinhard, M., Schneider, W. F., Schüth, C., Shapley, J. R., Strathmann, T. J., & Werth, C. J. (2012) · Environmental Science & Technology · doi:10.1021/es204087q · Cited by 458
Advances in Surface Passivation of Nanoscale Zerovalent Iron: A Critical Review
Bae, S., Collins, R. N., Waite, T. D., & Hanna, K. (2018) · Environmental Science & Technology · doi:10.1021/acs.est.8b01734 · Cited by 435
Environmental transformations and ecological effects of iron-based nanoparticles
Lei, C., Sun, Y., Tsang, D. C. W., & Lin, D. (2018) · Environmental Pollution · doi:10.1016/j.envpol.2017.09.052 · Cited by 347
Refining in vitro models for nanomaterial exposure to cells and tissues
Guggenheim, E. J., Milani, S., Röttgermann, P. J. F., Dusinska, M., Saout, C., Salvati, A., Rädler, J. O., & Lynch, I. (2018) · NanoImpact · doi:10.1016/j.impact.2018.02.008 · Cited by 36
Metadata
- Authors
- Sarathy, V., Tratnyek, P. G., Nurmi, J. T., Baer, D. R., Amonette, J. E., Chun, C. L., Penn, R. L., & Reardon, E. J.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-01-30
- Volume
- 112
- Issue
- 7
- Pages
- 2286-2293
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2092413347
- Cited by
- 251
- References
- 1
- FWCI
- 7.89
- Type
- journal article
- Language
- en
- Open access
- closed
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