The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Influence of Mineral Surfaces on Chromium(VI) Reduction by Iron(II)
Abstract
Chromium(VI) is a priority pollutant of some soils and natural waters in industrial areas. Iron(II), an important natural reductant of Cr(VI), is an option in remediation of contaminated sites, transforming Cr(VI) to essentially nontoxic Cr(III). After kinetics and pathways of this redox reaction had been reported to depend strongly on pH and organic ligands, this study investigated the influence of mineral surfaces. Kinetic measurements with UV−vis in mineral and soil suspensions at pH 5 showed that all minerals tested, except Al 2 O 3, accelerated the Cr(VI) reduction by Fe(II), in the order of α-FeOOH ≈ γ-FeOOH ≫ montmorillonite > kaolinite ≈ SiO 2 ≫ Al 2 O 3 . Similar kinetics were observed with soil from the E and B Fe horizons of a Podzol. The reactions appear to be driven by the high reactivity of adsorbed Fe(II). Whereas adsorbed Cr(VI) was reducible by Fe(II), the sparingly soluble BaCrO 4 was largely protected from reduction. This is of environmental relevance since in many polluted soils, Cr(VI) is partly present as Ba, Ca, Fe, or Pb salts. Kinetic data and reaction pathways are important in the optimization of Fe(II)/mineral mixtures as reductants of Cr(VI) in technical systems, in the evaluation of in-situ remediation of Cr(VI)-contaminated waters and soils by Fe(II), and in qualitative predictions and modeling of Cr(VI) in natural systems.
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Citations
Cites
Surface reactions of chromium in soils and waters
Fendorf, S. E. (1995) · Geoderma · doi:10.1016/0016-7061(94)00062-f · Cited by 680
Cited by
Guan, X., Sun, Y., Qin, H., Li, J., Lo, I. M. C., He, D., & Dong, H. (2015) · Water Research · doi:10.1016/j.watres.2015.02.034 · Cited by 962
Spectroscopic Evidence for Fe(II)−Fe(III) Electron Transfer at the Iron Oxide−Water Interface
Williams, A. G. B., & Scherer, M. M. (2004) · Environmental Science & Technology · doi:10.1021/es049373g · Cited by 532
Geomicrobiological Cycling of Iron
Kappler, A. (2005) · Reviews in Mineralogy and Geochemistry · doi:10.2138/rmg.2005.59.5 · Cited by 441
Jiang, B., Gong, Y., Gao, J., Sun, T., Liu, Y., Oturan, N., & Oturan, M. A. (2019) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2018.10.070 · Cited by 365
Reactivity of Fe(II)-bearing minerals toward reductive transformation of organic contaminants
Elsner, M., Schwarzenbach, R. P., & Haderlein, S. B. (2004) · Environmental Science & Technology · doi:10.1021/es0345569 · Cited by 343
Metadata
- Authors
- Buerge, I. J., & Hug, S. J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-10-22
- Volume
- 33
- Issue
- 23
- Pages
- 4285-4291
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2050507226
- Cited by
- 310
- References
- 1
- FWCI
- 4.88
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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