Effect of Fenton pre-oxidation on mobilization of nutrients and efficient subsequent bioremediation of crude oil-contaminated soil

TitleEffect of Fenton pre-oxidation on mobilization of nutrients and efficient subsequent bioremediation of crude oil-contaminated soil
Publication TypeJournal Article
Year of Publication2017
AuthorsXu J.L, Kong F.X, Song S.H, Cao Q.Q, Huang T.L, Cui Y.W
JournalChemosphere
Volume180
Pagination1-10
Date PublishedAug
ISBN Number0045-6535
Accession NumberWOS:000401880500001
KeywordsOil and Gas Degradation
AbstractFenton pre -oxidation and a subsequent bioremediation phase of 80 days were used to investigate the importance of matching concentration of residual indigenous bacteria and nutrient levels on subsequent bioremediation of crude oil. Experiments were performed using either high (>10(7.7) (+/- 0.2) CFU/g soil) or low (<10(5.9) (+/- 0.1) of CFU/g soil) concentrations of bacteria and three different nutrient levels: enough (C/ N > 9.8), moderate (C/N:5-9.8), and lacking nutrient level (C/N < 5) conditions. Weak Fenton pre oxidation (225 mM H2O2 and 2.9 mM Fe2+) resulted in highly matching between nutrient level and the population of residual indigenous bacteria. Up to 53% of total petroleum hydrocarbon (TPH) and 58% of main hydrocarbon (C-15-C-25, during the first 10 days) were removed from the soil. Under matching conditions, the activity of indigenous bacteria and nutrient mobilization were enhanced, promoting the bioremediation of crude oil. In addition, the biodegradation of long chain molecules (C-26-C-30) required a high level of NH4+-N. (C) 2017 Elsevier Ltd. All rights reserved.
DOI10.1016/j.chemosphere.2017.03.087