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- W2384315468 abstract "Residual oil after bioremediation in crude oil contaminated soil could be hardly biodegraded.In this study, column experiments were carried out to evaluate the effects of ozonation of residual oil. Maximum of removal efficiency(0.3mg oil/mg O3)was reached when ozone dosage was about 20 mg/g soil.Under this condition,population of petroleum degrading bacteria was reduced only by 1 order of magnitude.Among the four fractions of oil,aromatics showed highest removal,followed by saturates,and resins and asphaltenesincreased after ozonation.Ozonation was able to remove residual oil with all range of molecular weight, resulting in a slight decrease of average molecular weight of residual oil.GC-MS results indicated that ozone removal rate of different types of contaminants showed following sequence: polycyclic aromatic hydrocarbons(PAHs)steranes hopanesalkyl cyclohexanesn-alkanes.Ozonation did not change biomarker parameters.Increase of C15 ~C22 n-alkanes,C17 ~C20 alkyl cyclohexanes and C8 ~C22 carboxylic acids and production of C11 ~C25 aldehydes were observed after ozonation. Removal rate for biodegradation of ozonated residual oil was twice of the control,indicating that bioavailability of residual oil was improved by ozonation." @default.
- W2384315468 created "2016-06-24" @default.
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- W2384315468 date "2013-01-01" @default.
- W2384315468 modified "2023-09-24" @default.
- W2384315468 title "Removal of residual oil in contaminated soil by ozonation" @default.
- W2384315468 hasPublicationYear "2013" @default.
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