| 摘要: |
| 以渤海某原油作为研究对象进行50 d 综合模拟风化实验, 探讨了原油中五类PAHs 组分的分布情况及其风化规律。结果表明: 经过50 d 风化, 原油中PAHs 的分布发生了较大的改变: 萘系列化合物损失最为严重, 相对浓度的损失达到56.78%; 菲系列所占的比例有所提高, 二苯并噻吩、屈、芴系列则保持相对稳定, 其分布特征变化规律为进一步筛选溢油来源鉴别新诊断比值参数提供了一定的导向性; 经风化检验, 现有常用6 种PAHs 诊断比值在风化50 d 后稳定性良好, 可用于风化溢油的鉴别。 |
| 关键词: 原油 多环芳烃 风化 诊断比值 |
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| 基金项目:大连理工大学海岸和近海工程国家重点实验室开放基金项目(LP1012); 海洋公益性行业科研专项(201205012); 国家海洋局近岸海域生态环境重点实验室开放研究基金项目(200908) |
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| Changes of polycyclic aromatic hydrocarbons(PAHs)in the crude oil from Bohai Sea under comprehensive weathering condition |
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| Abstract: |
| This paper presents the changes of polycyclic aromatic hydrocarbons(PAHs) in the crude oil from Bohai Sea under comprehensive weathering condition. The results showed that the distribution patterns of PAHs in crude oil had great changes after 50 days weathering. Naphthalene (NAP) series compounds had the most serious loss and loss of the relative concentration reached 56.78%, while the proportion of phenanthrene (PHE) series compounds has increased in some extent. Dibenzothiophene (DBT) series, chrysene (CHR) series and fluorene (FLU) series remained relatively stable. The disciplines of PAHs distribution can lead to screen out new diagnostic ratios for oil spill identification. The customary six diagnostic ratios were proved to have strong weathering-resistant capabilities under the synthetical weathering conditions and they can be used for source identification of weathered oil. |
| Key words: crude oil PAHs weathering diagnostic ratio |
