摘要
以某船舶燃料油为研究对象,进行自然条件下的风化实验,研究燃料油中的正构烷烃、PAHs的风化规律及特征比值随风化时间的稳定性,了解风化与该油品的化学组成变化间的关系。结果表明:(1)自然风化60 d后,燃料油品低碳组分(小于nC13)的正构烷烃几乎完全消失,中碳数正构烷烃可能比高碳数正构烷烃更难于风化;(2)随着PAHs环数的增加,燃料油品PAHs组分的风化损失减少;菲与二苯并噻吩的损失表明烷基化程度大的化合物可能比未发生取代的PAHs损失程度更大。最后,通过将正构烷烃、甾萜烷类生物标志物和PAHs中的24个特征比值的相对标准偏差与5%进行比较,判断其稳定性,筛选出该油品中稳定性好的特征比值,为其风化溢油鉴别提供技术支持。
Based on some ship fuel oil as the research object,performing the weathering experiment under natural conditions,this article studies the weathering regulation of n-alkane and polycyclic aromatic hydrocarbons and the stability of diagnostic ratios at different weathering times in fuel oil. The results show that：（ 1） Fuel oil collected 60 days after the weathering experiment shows that there is nearly an absence of aliphatic compounds〈 n-C 13; middle molecular weight normal alkanes maybe more resistant to weathering than high molecular weight normal alkanes.（ 2） The weathering depletion of PAHs compositions declines in fuel oil as the number of rings increased. The loss of phenanthrenes and dibenzothiophenes indicates that the most alkylated members maybe more depleted than the less substituted ones. At last,by means of comparing the relative standard deviation of 24 diagnostic ratios developed form n-alkane,biomarkers and PAHs with 5 percent,the paper chooses the diagnostic ratios with good stability to provide technical support for the weathering oil spill identification.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2014年第1期83-88,共6页
Marine Environmental Science
基金
海洋溢油污染风险评估及应急响应关键技术集成及应用示范(201205012)
关键词
船舶燃料油
自然风化
正构烷烃
PAHS
特征比值
ship fuel oil
natural weathering
n-alkane
polycyclic aromatic hydrocarbons
diagnostic ratios
