Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
Mar Pollut Bull. 2018 Aug;133:756-761. doi: 10.1016/j.marpolbul.2018.06.036. Epub 2018 Jun 22.
In-situ burning (ISB) is a remediation strategy that is used for managing oil spills. ISB generates heavy residues that can submerge and negatively impact benthic environments. To track the fate of toxic contaminants in ISB residues, a conservative hopane biomarker, such as C-αβ hopane, is often used. Furthermore, diagnostic ratios of various hopanes are used for source oil identification. Use of these biomarkers assume that during ISB the quantity of C-αβ hopane will be conserved, and the diagnostic ratios of various hopanes will be stable. The objective of this study is to test the validity of these two assumptions. We conducted laboratory-scale ISB experiments using a model oil prepared from commercial C-αβ hopane standard, and a reference crude oil. Laboratory data collected under controlled burning conditions show that C-αβ hopane will not be conserved; however, the diagnostic ratios of hopanes will still remain fairly stable.
原位燃烧（ISB）是一种用于处理溢油的修复策略。ISB 会产生大量的残留物，这些残留物可能会淹没并对底栖环境产生负面影响。为了追踪 ISB 残留物中有毒污染物的归宿，通常使用一种保守的藿烷生物标志物，如 C-αβ藿烷。此外，各种藿烷的诊断比值可用于识别源油。使用这些生物标志物的前提是在 ISB 过程中，C-αβ藿烷的数量将保持守恒，并且各种藿烷的诊断比值将保持稳定。本研究的目的是检验这两个假设的有效性。我们使用商业 C-αβ藿烷标准品和参考原油进行了实验室规模的 ISB 实验。在受控燃烧条件下收集的实验室数据表明，C-αβ藿烷不会保持守恒；然而，藿烷的诊断比值仍将相当稳定。
