【摘要】 在石油烃微生物降解的最佳条件下,利用色谱-质谱联用技术分析测定了石油烃中正构烷烃的降解规律。结果表明,正构烷烃的降解最为明显;正构烷烃的降解随着碳数的增加其降解速度逐渐减小;其中C23烷的降解速度与石油烃整体降解速度相当,碳数小于23的正构烷烃降解速度大于石油烃降解速度,碳数大于23的正构烷烃降解速度小于石油烃降解速度;C16～C25的正构烷烃在0～6d内降解速度最快,在7～14d内达到最低值,之后有逐渐上升的趋势;整个正构烷烃的降解符合二级反应动力学规律。更多还原

【Abstract】 Under the optimal conditions for degradation of petroleum hydrocarbon by microorganisms,GC\|MS technique was used to monitor and analyze the degradation patterns of n\|alkanes in soil.The results showed that n\|alkanes have the fastest degradation rate among petroleum hydrocarbons;heavier n\|alkanes have slower degradation rate;tricosane shares the same degradation rate with the total petroleum hydrocarbons in the soil;the degradation rate of alkanes with carbon number less than 23 is greater than that of total petroleum hydrocarbons;and the degradation rate of alkanes with carbon number greater than 23 is less than that of total petroleum hydrocarbons.The degradation rates of C16～C25 are biggest in the period from the beginning to the 6th day,reach the minimum from the 7th to 14th day,and have the increasing trend afterwards.The degradation of the total n\|alkanes follows with the second order reaction kinetics law.更多还原