%K Abiotic conditions; Acinetobacters; Adverse effect; Alcaligenes; Aquatic environments; Bacterial consortium; Ballast water; Bilge waste; Bio-augmentation; Bioavailability; Contaminated seawater; Dispersants; Dispersed crude oil; First order kinetics; Half lives; Human health; Hydrocarbon pollution; Kinetic modeling; Marine ecosystem; Natural attenuation; Oil biodegradation; Oil concentration; Oil removal; Petroleum; Petroleum hydrocarbons; Polluted area; Total petroleum hydrocarbons, Bacteriology; Biochemistry; Biodegradation; Bioreactors; Bioremediation; Biotechnology; Crude oil; Degradation; Ecosystems; Experiments; Hydrocarbons; Marine pollution; Oil spills; Petroleum chemistry; Pollution; Seawater, Oil tankers, carbon monoxide; corexit 9500; dispersant; nitrogen; petroleum; petroleum derivative; phosphorus; sea water; unclassified drug, aquatic environment; bacterium; ballast water; bioavailability; biodegradation; biomonitoring; bioreactor; bioremediation; crude oil; discharge; health risk; hydrocarbon; identification method; marine ecosystem; marine pollution; numerical model; oil spill; petroleum; pollutant removal; pollution control; reaction kinetics; research work; restoration ecology; solvent; species diversity, Acinetobacter; Alcaligenes; article; Bacillus; bioreactor; bioremediation; concentration (parameters); controlled study; dispersion; half life time; nonhuman; Pseudomonas; temperature; Vibrio; water contamination, Biodegradation, Environmental; Bioreactors; Environmental Remediation; Half-Life; Kinetics; Models, Theoretical; Petroleum; Water Microbiology, Acinetobacter; Alcaligenes; Bacillus (bacterium); Bacteria (microorganisms); Pseudomonas; Vibrio
%X Hydrocarbon pollution in marine ecosystems occurs mainly by accidental oil spills, deliberate discharge of ballast waters from oil tankers and bilge waste discharges; causing site pollution and serious adverse effects on aquatic environments as well as human health. A large number of petroleum hydrocarbons are biodegradable, thus bioremediation has become an important method for the restoration of oil polluted areas. In this research, a series of natural attenuation, crude oil (CO) and dispersed crude oil (DCO) bioremediation experiments of artificially crude oil contaminated seawater was carried out. Bacterial consortiums were identified as Acinetobacter, Alcaligenes, Bacillus, Pseudomonas and Vibrio. First order kinetics described the biodegradation of crude oil. Under abiotic conditions, oil removal was 19.9 while a maximum of 31.8 total petroleum hydrocarbons (TPH) removal was obtained in natural attenuation experiment. All DCO bioreactors demonstrated higher and faster removal than CO bioreactors. Half life times were 28, 32, 38 and 58 days for DCO and 31, 40, 50 and 75 days for CO with oil concentrations of 100, 500, 1000 and 2000. mg/L, respectively. The effectiveness of Corexit 9500 dispersant was monitored in the 45 day study; the results indicated that it improved the crude oil biodegradation rate. © 2010 Elsevier B.V.
%L scholars2262
%J Journal of Hazardous Materials
%O cited By 68
%N 2-3
%R 10.1016/j.jhazmat.2010.10.009
%D 2011
%V 185
%A M.A. Zahed
%A H.A. Aziz
%A M.H. Isa
%A L. Mohajeri
%A S. Mohajeri
%A S.R.M. Kutty
%T Kinetic modeling and half life study on bioremediation of crude oil dispersed by Corexit 9500
%P 1027-1031