Biodegradability of volatile hydrocarbons of gasoline
Biodegradability of volatile hydrocarbons of gasoline
复制标题
汽油挥发性碳氢化合物的生物降解性
DOI：
10.1007/s002530000354
复制
发表时间：
2000
影响因子：
5
通讯作者：
J. Vandecasteele
中科院分区：
文献类型：
--
作者：
F. Solano;R. Marchal;T. Huet;J. Lebeault;J. Vandecasteele
摘要研究了汽油中挥发性烃（4-6碳）的好氧生物降解性。挥发性烃包括正构烷烃、异构烷烃、环烷烃和烯烃。活性污泥被用作参考微生物群落。生物降解试验包括在最佳条件下在密闭烧瓶中降解汽油的挥发分。生物降解的动力学监测CO2的生产。在烧瓶顶部空间取样后，通过气相色谱分析混合物中所有可测量的烃类（12种化合物）测定最终降解。还用相同的方法研究了单个烃的降解。当单独孵育时，除了2，2-二甲基丁烷和2，3-二甲基丁烷之外，所有用作碳源的烃在30天或更短的时间内被完全消耗，具有不同的速度和初始滞后期。当孵育在一起的轻汽油馏分的成分，所有的碳氢化合物代谢，往往以更高的速度比个别化合物。彗星参与了二甲基异烷烃的降解。
Abstract The biodegradability under aerobic conditions of volatile hydrocarbons (4–6 carbons) contained in gasoline and consisting of n-alkanes, iso-alkanes, cycloalkanes and alkenes, was investigated. Activated sludge was used as the reference microflora. The biodegradation test involved the degradation of the volatile fraction of gasoline in closed flasks under optimal conditions. The kinetics of biodegradation was monitored by CO2 production. Final degradation was determined by gas chromatographic analysis of all measurable hydrocarbons (12 compounds) in the mixture after sampling the headspace of the flasks. The degradation of individual hydrocarbons was also studied with the same methodology. When incubated individually, all hydrocarbons used as carbon sources, except 2,2-dimethylbutane and 2,3-dimethylbutane, were completely consumed in 30 days or less with different velocities and initial lag periods. When incubated together as constituents of the light gasoline fraction, all hydrocarbons were metabolised, often with higher velocities than for individual compounds. Cometabolism was involved in the degradation of dimethyl isoalkanes.