Trichloroethylene Degradation by Zero Valent Iron Activated Persulfate Oxidation
- 1 September 2008
- journal article
- Published by Mary Ann Liebert Inc in Environmental Engineering Science
- Vol. 25 (7), 1071-1078
- https://doi.org/10.1089/ees.2007.0174
Abstract
The present study describes the use of zero valent iron (Fe-0) as a source for ferrous ion activated persulfate (PS) oxidation of trichloroethylene (TCE). The experimental results indicated that in the absence of TCE there was a lag time for persulfate decomposition when the reaction was activated by Fe-0. An initial pH drop in the Fe-0/PS system to acidic conditions was accompanied by the persulfate decomposition and a decrease in oxidation-reduction potential (ORP) values. Furthermore, in the TCE/Fe-0/PS system, the rapid TCE degradation was accompanied by the rapid persulfate decomposition and chloride ion formation as evidence of TCE mineralization. SEM images of Fe-0 before and after persulfate oxidation exhibited significant corrosions of Fe-0. Acicular aggregate formation in the absence of TCE and coarse aggregate formation in the presence of TCE were observed. Moreover, the XRD spectrum revealed the formation of magnetite over the surface of Fe-0 after contact with persulfate. Thus, Fe-0 activated persulfate oxidation offers a fast and effective way for remediation of TCE contaminationKeywords
This publication has 18 references indexed in Scilit:
- Evaluation of reverse osmosis and nanofiltration for in situ persulfate remediated groundwaterDesalination, 2007
- Phenol degradation using hydroxyl radicals generated from zero-valent iron and hydrogen peroxideApplied Catalysis B: Environment and Energy, 2006
- Characterisation of aqueous ferric chloride etchants used in industrial photochemical machiningJournal of the American Academy of Dermatology, 2004
- Persulfate oxidation for in situ remediation of TCE. II. Activated by chelated ferrous ionChemosphere, 2004
- Persulfate oxidation for in situ remediation of TCE. I. Activated by ferrous ion with and without a persulfate–thiosulfate redox coupleChemosphere, 2004
- Radical Generation by the Interaction of Transition Metals with Common OxidantsEnvironmental Science & Technology, 2004
- Formation of Ferrihydrite and Associated Iron Corrosion Products in Permeable Reactive Barriers of Zero-Valent IronEnvironmental Science & Technology, 2002
- Reaction of SO4- with Fe2+, Mn2+ and Cu2+ in aqueous solutionJournal of the Chemical Society, Faraday Transactions, 1997
- Electron transfer reaction rates and equilibria of the carbonate and sulfate radical anionsInternational Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1991
- Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous SolutionJournal of Physical and Chemical Reference Data, 1988