Predicting Fenton-driven degradation using contaminant analog

Citation
Sg. Huling et al., Predicting Fenton-driven degradation using contaminant analog, J ENV ENG, 126(4), 2000, pp. 348-353
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology,"Environmental Engineering & Energy
Journal title
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
ISSN journal
0733-9372 → ACNP
Volume
126
Issue
4
Year of publication
2000
Pages
348 - 353
Database
ISI
SICI code
0733-9372(200004)126:4<348:PFDUCA>2.0.ZU;2-B
Abstract
The reaction of hydrogen peroxide (H2O2) and Fe(II) (Fenton's reaction) gen erates hydroxyl radicals (.OH) that can be used to oxidize contaminants in soils and aquifers. In such environments, several factors can limit the eff ectiveness of chemical oxidation, including reactions involving H2O2 that d o not yield .OH, .OH reactions with nontargeted chemicals, and insufficient iron in the soil or aquifer. Consequently, site-specific studies may be ne cessary to evaluate the feasibility of chemical oxidation using H2O2. Here, the degradation of a contaminant analog, alpha-(4-pyridyl-1-oxide) N-tert- butylnitrone (4POBN), was used to estimate .OH concentration and simplify t esting procedures. A kinetic model was developed, calibrated using 4POBN de gradation kinetics, and used to predict the disappearance of 2-chlorophenol (2CP), a representative target. Good agreement between predicted (Y) and m easured (X) values for 2CP (Y = 0.95X) suggests that the kinetics of analog s degradation can be used to predict the degradation rate of compounds for which the rate constant for reaction with .OH is known.