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Treatment of PAH-contaminated soil by combination of Fenton's reaction and biodegradation

✍ Scribed by Marja RT Palmroth; Jörg H Langwaldt; Tuomo A Aunola; Anna Goi; Jaakko A Puhakka; Tuula A Tuhkanen

Publisher
Wiley (John Wiley & Sons)
Year
2006
Tongue
English
Weight
157 KB
Volume
81
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

A combination of modified Fenton and biological treatment was used to remove polycyclic aromatic hydrocarbons (PAHs) from creosote oil‐contaminated soil. After modified Fenton reaction the toxicity of column leachate and soil to Vibrio fischeri increased. The number of intact bacterial cells and utilisation of PAHs in PAH utilisation microplate assay decreased after modified Fenton reaction. However, bacteria in chemically treated soil utilised PAHs without addition of other carbon sources. The activity of extracellular esterases increased during incubation of modified Fenton‐treated soil. PAH removal in combined chemical oxidation and incubation (43–59%) was higher than in incubation alone (22–30%). Residual H~2~O~2~ in soil allowed chemical oxidation of PAHs during incubation. Copyright © 2006 Society of Chemical Industry

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