Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 92, Issue 4, Pages 1051-1073Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2010.11.026
Keywords
Pollutants; Remediation; Electron-transfer reactions; Degradation; Sludge odor
Categories
Funding
- NATO [CBP.EAP.CLG.983119]
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Inorganic contaminants are found in water, wastewaters, and industrial effluents and their oxidation using iron based oxidants is of great interest because such oxidants possess multi-functional properties and are environmentally benign. This review makes a critical assessment of the kinetics and mechanisms of oxidation reactions by ferrates ((FeO42-)-O-VI, (FeO43-)-O-V, and Fe(IV)). The rate constants (k, M-1 s(-1)) for a series of inorganic compounds by ferrates are correlated with thermodynamic oxidation potentials. Correlations agree with the mechanisms of oxidation involving both one-electron and two-electron transfer processes to yield intermediates and products of the reactions. Case studies are presented which demonstrate that inorganic contaminants can be degraded in seconds to minutes by ferrate(VI) with the formation of non-toxic products. (C) 2010 Elsevier Ltd. All rights reserved.
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