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Pyrolysis of asphaltenes and biomarkers for the fingerprinting of the Amoco-Cadiz oil spill after 23 years

机译:23年后热解沥青质和生物标记物以识别Amoco-Cadiz溢油

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The geochemical technique of asphaltenes pyrolysis was successfully applied to the long-term monitoring of the Amoco-Cadiz oil spill 23 years after the wreck in the salt marshes of Ile Grande, Northern Brittany, France. This method allows the reconstitution of the saturated fraction of the original oil from the asphaltenes fraction of severely degraded oil residues. The results showed that the oil reached a degradation rate of 60% relatively to the initial oil. The asphaltenes pyrolysis generated a gas chromatographic profile very similar to the original Amoco-Cadiz oil. In the biomarkers fraction, gas chromatographic/mass spectrometric (GC-MS) analyses demonstrated that terpanes were conserved whereas steranes were partly degraded. We also showed that the class of seco-hopanes biomarkers are conserved and can be used in the long-term monitoring of oil pollutions.
机译:沥青质热解的地球化学技术已成功应用于法国布列塔尼北部Ile Grande盐沼沉船遇难23年后的Amoco-Cadiz溢油的长期监测。该方法允许从严重降解的油渣的沥青质馏分中重构原始油的饱和馏分。结果表明,该油相对于初始油达到了60%的降解率。沥青质热解产生的气相色谱图非常类似于原始的Amoco-Cadiz油。在生物标志物级分中,气相色谱/质谱(GC-MS)分析表明,萜烯是保守的,而甾烷则部分降解。我们还表明,山核桃型生物标记物是保守的,可用于油污的长期监测。

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