自然风化条件下原油中金刚烷的风化规律  

Change of diamondoid compounds in crude oils under natural weathering conditions

作　　者：詹天荣[1] 张魁英[1,2] 杨佰娟[2] 郑立[2] 臧家业[2] 王小如[2] 黎先春[2] 

机构地区：[1]青岛科技大学化学与分子工程学院,青岛266042 [2]国家海洋局第一海洋研究所海洋生态研究中心,青岛266061

出　　处：《环境化学》2012年第2期202-207,共6页Environmental Chemistry

基　　金：海洋公益性行业科研专项(200705011);中国海监技术支撑体系项目;海洋环境保护及节能减排专项;国家海洋局青年海洋科学基金(2010518);国家海洋局海洋溢油鉴别与损害评估技术重点实验室开放基金(201013);国家海洋局海洋生态环境科学与工程重点实验室开放基金(MESE-2010-08)联合资助;国家自然科学基金(20602009;41076108;40806053;20905017)

摘　　要：以渤海2个原油作为研究对象进行自然风化实验,探讨了原油中金刚烷化合物的分布情况及其风化规律.结果表明,经过100 d的室外自然风化,原油中金刚烷的分布已经发生了较大的改变:风化损失程度与金刚烷化合物的沸点有关,风化初期单金刚烷损失严重,风化45 d,单金刚烷完全消失;双金刚烷浓度变化较小,有较好的抗风化稳定性;通过t检验分析,所选取诊断比值中,单金刚烷指标A6、A8、A12和双金刚烷指标A16、A17、A18较为稳定,能很好地指示自然风化20 d内油样的来源;双金刚烷指标A17、A18风化100 d非常稳定,可用于长期自然风化油样来源鉴别,金刚烷化合物诊断比值对于溢油鉴别具有重要的意义.This paper describes the changes of some diamondoid compounds in two crude oils from Bohai Sea during natural long-term weathering.The results show that the distribution patterns of diamondoid compounds in the crude oils changed greatly after 100 day natural weathering.The loss of the diamondoids during natural weathering was largely determined by their boiling points.The adamantane concentrations decreased significantly at the begining of weathering.Adamantanes were not found after 45 day natural weathering.The concentrations of diamantanes decreased slightly with weathering time,and the diamantanes had stronger weathering-resistant capabilities.According to the 'Student′s t' statistics,the ratios of A6,A8,A12,A16,A17 and A18 had no apparent changes,and can be used as an indicator for the source of the samples during the first 20 day weathering.Diamantanes ratios of A17,A18 were essentially constant after 100 days natural weathering,and can therefore be used as an indicate for the source of the samples during long-term weathering.Our results suggest that the diamondoid group can provide useful diagnostic means for oil spill source identification.

关 键 词：原油 金刚烷 自然风化 诊断比值 

分 类 号：X834[环境科学与工程—环境工程]