生物降解作用对烷基萘异构体分布的影响及其控制因素  

The effect of biodegradation on distribution of alkyl naphthalene isomers and controlling factors

作　　者：俞頔 崔志松[2] 沈冰芳 李馨子[2] 郑立[2] 孙永革[1,3] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027 [2]国家海洋局第一海洋研究所海洋生态研究中心,山东青岛266061 [3]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东广州510640

出　　处：《地球化学》2014年第2期149-156,共8页Geochimica

基　　金：国家自然科学基金(41172112);海洋公益性行业科研专项(200705011);浙江大学海洋科学种子基金

摘　　要：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Ostoji?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。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 Ostojiéet 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.

关 键 词：烷基萘异构体 生物降解速率 溢油污染 表生环境 

分 类 号：P59[天文地球—地球化学]