title: Feasibility study of bioremediation of a drilling-waste-polluted soil: stimulation of microbial activities and hydrocarbon removal.
abstract: The objective of this study was to determine the feasibility of bioremediation as a treatment option for an aged and chronically polluted drilling waste soil located at the Southeast of Mexico. The polluted drilling-waste site with a mean total petroleum hydrocarbon concentration (TPHs) of 39,397 +/- 858 mg/kg was treated with one dose of a nutrient-surfactant commercial product at 40 mg/kg soil and two doses of H2O2 (50 and 100 mg H2O2/kg soil). In this study, the parameters that were monitored include soil respiration, heterotrophic and hydrocarbon-degrading bacteria as biological indicators, catalase and dehydrogenase activities, and TPHs degradation as decontamination parameters. The results demonstrated that the microbial activities can be stimulated in a polluted drilling-waste site by the addition of H2O2 and commercial product, thereby resulting in increasing TPHs degradation. These aspects must be taken into account when biodegradation studies involve the application of a commercial product.
authors.affiliation: Programa de Biotecnología del Petróleo, Instituto Mexicano del Petróleo, México, D.F., México. ngrojas@imp.mx
authors.forename: Norma
authors.initials: N
authors.lastname: Rojas-Avelizapa
authors.forename: Erika
authors.initials: E
authors.lastname: Olvera-Barrera
authors.forename: Luis
authors.initials: L
authors.lastname: Fernández-Linares
mesh_terms: D000704:Analysis of Variance; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002374:Catalase / Q000378:metabolism; D015169:Colony Count, Microbial; D004787:Environmental Pollution / Q000517:prevention & control*; D019652:Extraction and Processing Industry; D005240:Feasibility Studies; D006861:Hydrogen Peroxide / Q000378:metabolism; D008800:Mexico; D010088:Oxidoreductases / Q000378:metabolism; D010578:Petroleum / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D013501:Surface-Active Agents / Q000378:metabolism
chemical_list: D010578:Petroleum; D012989:Soil Pollutants; D013501:Surface-Active Agents; D006861:Hydrogen Peroxide; D010088:Oxidoreductases; D002374:Catalase