The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
Rates of Hydroxyl Radical Generation and Organic Compound Oxidation in Mineral-Catalyzed Fenton-like Systems
Abstract
The iron oxide-catalyzed production of hydroxyl radical (*OH) from hydrogen peroxide (H2O2) has been used to oxidize organic contaminants in soils and groundwater. The goals of this study are to determine which factors control the generation rate of *OH (VOH) and to show that if VOH and the rate constants of the reactions of *OH with the system's constituents are known, the oxidation rate of a dissolved organic compound can be predicted. Using 14C-labeled formic acid as a probe, we measured VOH in pH 4 slurries of H2O2 and either synthesized ferrihydrite, goethite, or hematite or a natural iron oxide-coated quartzitic aquifer sand. In all of our experiments, VOH was proportional to the product of the concentrations of surface area of the iron oxide and H2O2, although different solids produced *OH at different rates. We used these results to develop a model of the decomposition rate of formic acid as a function of the initial formic acid and hydrogen peroxide concentrations and of the type and quantity of iron oxide. Our model successfully predicted the VOH and organic compound oxidation rates observed in our aquifer sand experiment and in a number of other studies but overpredicted VOH and oxidation rates in other cases, possibly indicating that unknown reactants are either interfering with *OH production or consuming *OH in these systems.
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Cites
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Self-citationMechanisms of Hydrogen Peroxide Decomposition in Soils
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Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review
He, J., Yang, X., Men, B., & Wang, D. (2016) · Journal of Environmental Sciences · doi:10.1016/j.jes.2015.12.003 · Cited by 587
Li, H., Shang, J., Yang, Z., Shen, W., Ai, Z., & Zhang, L. (2017) · Environmental Science & Technology · doi:10.1021/acs.est.7b00040 · Cited by 538
Catalytic Oxidation Process for the Degradation of Synthetic Dyes: An Overview
Javaid, R., & Qazi, U. Y. (2019) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph16112066 · Cited by 365
Li, Y., Yang, T., Qiu, S., Lin, W., Yan, J., Fan, S., & Zhou, Q. (2020) · Chemical Engineering Journal · doi:10.1016/j.cej.2020.124382 · Cited by 365
Metadata
- Authors
- Kwan, W. P., & Voelker, B. M.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-02-14
- Volume
- 37
- Issue
- 6
- Pages
- 1150-1158
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2064769056
- Cited by
- 667
- References
- 11
- FWCI
- 14.88
- Type
- journal article
- Language
- en
- Open access
- closed
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