The time series of oil samples from the oil spill beach were collected to investigate the response of trimethylnaphthalenes and tetramethylnaphthalenes isomers of alkylnaphthalenes in the aromatic fractions to natural biodegradation process. The absolute concentration dynamics of alkylnaphthalenes along time sequence suggest that trimethylnaphthalenes are more easily biodegraded than tetramethylnaphthalenes, and the 1,2,7-trimethylnaphthalene, 2,3,6-trimethylnaphthalene, 2,3,6,7-tetramethylnaphthalene, 1,2,3,7-tetramethylnaphthalene, and 1,3,5,7-tetramethylnaphthalene isomers demonstrate a relatively high biodegradation efficiency. The results are in agreement with the theoretical model by Ostojićet al., indicating that the degradation of alkylnaphthalenes in the surface environment is mainly controlled by the number and location of substituted methyl on the ring cycle. It is of important to imply for the bioremediation strategy-making in terms of polycyclic aromatic hydrocarbon pollution in surface environment.%在受到溢油污染的海滩上采集不同时间序列的石油样品,对芳烃组分烷基萘中的三甲基萘和四甲基萘各异构体的生物降解过程响应进行了详细分析。研究揭示,三甲基萘比四甲基萘更易被生物降解,其中1,2,7-三甲基萘、2,3,6-三甲基萘、2,3,6,7-四甲基萘、1,2,3,7-四甲基萘和1,3,5,7-四甲基萘等异构体具有相对较高的生物降解效率,与最近 Ostojić等利用理论模型计算所给出的降解序列十分一致,进一步证实了烷基萘在表生环境中的降解主要受控于异构体萘环上取代基的数量和位置。研究结果对于表生环境中萘系物类多环芳烃污染的生物修复评价具有重要指导意义。
展开▼
