Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Wilhelmshaven, Germany.
Bull Environ Contam Toxicol. 2010 Dec;85(6):585-8. doi: 10.1007/s00128-010-0144-4. Epub 2010 Nov 16.
To follow faecal pollution steroid compounds have been analysed in 106 sediment samples from the Siak River, E Sumatra, Indonesia. Coprostanol was detected in 40 of these. Contents ranged from 50 to 10,530 ng/g d.w. with a mean of 878 (TOC-normalised: range 7.4-393.0, mean 44.1 μg/g TOC). Total contents and the coprostanol/cholesterol ratio argue for a major contribution from untreated sewage which is also evident from field observations. The distribution along the river indicates the quantitatively dominant source to be the city of Pekanbaru with an estimated population of 1.5 million. Coprostanol contents decrease downstream indicating ongoing degradation either during transport or in the surface sediment. However, additional sources of coprostanol become evident further downstream. On the other hand, the 5β/(5β + 5α)-cholestan-3β-ol ratio versus cholesterol and a ternary plot using C27 sterols suggest that plant sources also contribute to the sedimentary coprostanol due to its formation by bacteria in suboxic/anoxic sediments.
为了追踪粪便污染，在印度尼西亚苏门答腊岛西阿克河的 106 个沉积物样本中分析了甾族化合物。在这些样本中，40 个检测到了粪甾醇。含量范围为 50 至 10530ng/g 干重，平均值为 878（以 TOC 归一化：范围为 7.4-393.0，平均值为 44.1μg/g TOC）。总含量和粪甾醇/胆固醇比值表明，未经处理的污水是主要来源，这也可以从现场观察中得到证实。沿着河流的分布表明，主要的定量来源是人口约 150 万的北干巴鲁市。粪甾醇含量在下游下降，表明在运输过程中或在表层沉积物中发生了持续的降解。然而，进一步下游出现了其他粪甾醇的来源。另一方面，5β/(5β + 5α)-胆甾烷-3β-醇与胆固醇的比值以及使用 C27 甾醇的三元图表明，由于细菌在缺氧/厌氧沉积物中的形成，植物源也会导致沉积物中的粪甾醇。
