Díez Sergi, Jover Eric, Bayona Josep M, Albaigés Joan
Department of Environmental Chemistry, IIQAB-CSIC, Jordi Girona, 18-26, 08034 Barcelona, Spain.
Environ Sci Technol. 2007 May 1;41(9):3075-82. doi: 10.1021/es0629559.
More than 200 oil samples were collected along the Northern Spanish coast, from December 2002 to December 2003, as part of the extensive monitoring program carried out by the Spanish Marine Safety Agency after the Prestige heavy oil spill (November 13, 2002). The GC FPD/ FID and comprehensive GC x GC/TOFMS sample profiles revealed the main characteristics of the oil residues. Chemical fingerprinting of the aliphatic and aromatic fractions by GC/ MS was performed to determine the source of the oil as well as to follow its weathering at sea. The (n-C13 + n-C14)/(n-C25 + n-C26), n-C18/phytane, and methylnaphthalene [(N + N1)/N2] ratios were found to be useful for assessing the evaporation, biodegradation, and dissolution processes, respectively. Other indicators of more advanced degradation processes, including photo-oxidation, were unaltered, showing the low incidence of natural weathering processes on the spilled heavy oil 1 year after the accident. The survey also demonstrated the occurrence of continued discharges of ballast waters at sea and the need for a more stringent surveillance of the area, beyond accidental oil spills.
作为西班牙海洋安全局在“威望号”重油泄漏事故（2002年11月13日）后开展的广泛监测计划的一部分，于2002年12月至2003年12月期间在西班牙北部海岸采集了200多个油样。气相色谱 - 火焰光度检测/氢火焰离子化检测（GC FPD/FID）和全二维气相色谱/飞行时间质谱（GC×GC/TOFMS）样本分析揭示了油残留物的主要特征。通过气相色谱/质谱（GC/MS）对脂肪族和芳香族馏分进行化学指纹分析，以确定油的来源并追踪其在海上的风化情况。发现（正十三烷 + 正十四烷）/（正二十五烷 + 正二十六烷）、正十八烷/植烷和甲基萘[（N + N1）/N2]比率分别可用于评估蒸发、生物降解和溶解过程。包括光氧化在内的更高级降解过程的其他指标未发生变化，表明事故发生1年后，自然风化过程对泄漏重油的影响较小。该调查还表明海上存在持续的压载水排放情况，并且除了意外溢油外，还需要对该区域进行更严格的监测。
