Fenton oxidation and combined Fenton-microbial treatment for remediation of crude oil contaminated soil in Assam - India.
The study is aimed at the remediation of soil spiked with crude oil (5%) by employing Fenton oxidation, biological treatment and combined Fenton-biological treatment. A spiked concentration of 5% crude oil was selected on the basis of contamination levels of 0-5% as found in the soil of upper Assam oil fields (India). The degradation of the aliphatic fraction (C14-C28) of the crude oil was investigated by gas chromatography. Fenton oxidation was carried out at different pH (3 to 8) in a laboratory batch reactor and maximum oxidative degradation was observed at pH 3-5. At pH 3, single Fenton oxidation resulted in 36 and 57% degradation in 5 and 10 days respectively. Biological treatment (with Fusarium solani) and combined Fenton-biological treatment were carried out with a one month incubation period. Biological treatment alone brought about 61% degradation of the crude oil while the combined process could achieve as much as 75% degradation of the aliphatic fractions of the crude oil.
Environmental Chemistry laboratory, Life Sciences Division (LSD), Institute of Advanced Study in Science and Technology (IASST), Paschim Boragaon, Guwahati - 781 035, Assam, India. deviarundh2@yahoo.co.in.
Surabhi
S
Buragohain
Dibakar Chandra
DC
Deka
Arundhuti
A
Devi
D001673:Biodegradation, Environmental; D004784:Environmental Monitoring; D005670:Fusarium / Q000254:growth & development; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007194:India; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010578:Petroleum / Q000032:analysis*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000302:isolation & purification*
C045076:Fenton's reagent; D010578:Petroleum; D012989:Soil Pollutants; D006861:Hydrogen Peroxide; D007501:Iron