在南大西洋油性地区解开 pyrolytic 和 petrogenic 源之间的差异:胆道PAHs 的分析方法
Antônia D F Lima1, Gladston R Carneiro Junior2, Rafael P Dos Santos1
1Laboratory for Assessment of Organic Contaminants (LACOr), Institute of Marine Sciences-Federal University of Ceará (LABOMAR-UFC), Av. Abolição, 3207-Meireles, 60165-081, Fortaleza, CE, Brazil; Tropical Marine Sciences Program, Institute of Marine Sciences-Federal University of Ceará (PPGCMT/LABOMAR/UFC), Brazil; Center of Chromatography Environmental and Petroleum, Institute of Marine Sciences-Federal University of Ceará (CECAMP/LABOMAR/UFC), Brazil.
Marine environmental research
|February 8, 2025
概括
研究人员开发了一种创新的方法来检测鱼胆中的多环芳 (PAH),评估石油泄漏对珊瑚礁的影响. 该研究区分了急性油污影响和慢性污染源.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 海洋生物学 海洋生物学
背景情况:
- 多环芳 (PAH) 是具有突变原和致癌性质的重要有机污染物,影响环境和人类健康.
- 油污地区,特别是珊瑚礁,需要有效的监测,以评估石油泄漏造成的生态损害.
- 2019年巴西阿拉戈阿斯的石油泄漏严重影响了珊瑚礁,需要对其对当地生态系统的影响进行评估.
研究的目的:
- 开发,验证和应用一种创新的方法来评估鱼胆中的石化和热性PAH.
- 为了评估2019年石油泄漏对巴西阿拉戈阿斯州Stegastes fuscus鱼类的影响.
- 在受影响的海洋环境中区分石油泄漏的急性影响和慢性PAH来源.
主要方法:
- 利用具有光探测器 (HPLC-FD) 的高性能液态染色学来准确量化鱼胆中的PAH.
- 分析了六种特定的化PAH化合物 (OHNaph,OHFln,OHPhen,OHPyr,OHChr,OHBaP) 基于它们的化序列.
- 采用矩阵曲线验证方法,实现高线性 (R2>0.9800),低检测极限 (DL) 和可接受的精度 (86-96%).
主要成果:
- 所有目标PAH化合物在所有采样地点的Stegastes fuscus胆汁样本中都被检测到.
- 在2020年,OHNaph是Japaratinga中最频繁检测到的化合物,而OHPyr在2021年是最常见的.
- 从2020年到2021年,观察到OHNaph度下降和OHBaP水平上升,这表明污染源的变化.
结论:
- 鱼胆中OHNaph的存在表明了2019年石油泄漏的影响.
- 特定OH-PAH的总和表明混合来源的贡献,而OHBaP则表明慢性污染.
- 开发的HPLC-FD方法有效地区分了海洋生态系统中的急性油污影响和慢性PAH污染.
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