The Primary Aerobic Biodegradation of Gasoline Hydrocarbons

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• 作者：Roger C. Prince ; Thomas F. Parkerton ; Carolyn Lee
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：May 1, 2007
• 年：2007
• 卷：41
• 期：9
• 页码：3316 - 3321
• 全文大小：169K
• 年卷期：v.41,no.9(May 1, 2007)
• ISSN：1520-5851

文摘

We describe the primary aerobic biodegradation of anunleaded, unoxygenated, regular gasoline by inocula fromunacclimated fresh and sea water, and from a domesticsewage treatment plant. Biodegradation was rapid andcomplete in all inocula, with an overall median "half-life",at ~70 ppm gasoline and low levels of inorganic nutrients,of 5 days. The biodegradation of 131 individual hydrocarbonsin the gasoline followed a relatively consistent pattern.The larger n-alkanes and iso-alkanes, and simple and alkylatedaromatic compounds were the most readily degradedcompounds, followed by the smaller n-alkanes and iso-alkanes and the naphthenes. The last compounds to bedegraded were butane, iso-butane, and 2,2-dimethylbutane,but even these disappeared with an apparent half-life of<30 days. The fact that the aqueous concentration of manyof the individual components was in the sub ppb level isa remarkable demonstration of the ability of unadaptedindigenous aerobic microorganisms to respond to andeffectively biodegrade gasoline range hydrocarbons.