Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
Chemosphere. 2011 Sep;85(2):203-9. doi: 10.1016/j.chemosphere.2011.06.031. Epub 2011 Jul 8.
PAHs, PCDD/Fs and non-ortho PCBs have been assessed in Yser and Upper-Scheldt river sediments. Higher contamination levels were observed in the Upper-Scheldt sediments: maximum concentrations for the 16 US-EPA PAHs, PCDD/Fs and non-ortho PCBs respectively amount to 8.9 mg kg(-1), 12 ng TEQ kg(-1) and 5.1 ng TEQ kg(-1). Diagnostic PAH ratios in sediments and atmospheric samples suggest that the PAH compounds are from pyrolytic origin, more specifically combustion processes. The huge consumption of coal in cokes-ovens and smelters and its use for house-heating in Northern France, although decreasing during the last decades, are in support of that suggestion. PCDD/F fingerprints in sediments and deposition material indicate that OCDD is the dominant congener. In addition use of pentachlorophenol (PCP) in the past led to a minor contribution of PCDD/Fs in our sediment samples. Non-ortho PCBs form a substantial fraction of the total TEQ concentrations observed in the sediments. Since the 1980s and 1990s a substantial reduction of the PCDD/F sediment concentrations is observed, but this is not the case for the PAHs.
已在 Yser 和上斯凯尔特河沉积物中评估了多环芳烃、多氯二苯并对二恶英/呋喃和非邻位多氯联苯。在上斯凯尔特河沉积物中观察到更高的污染水平：16 种美国环保署多环芳烃、多氯二苯并对二恶英/呋喃和非邻位多氯联苯的最大浓度分别达到 8.9 毫克/千克、12 纳克 TEQ/千克和 5.1 纳克 TEQ/千克。沉积物和大气样本中的诊断多环芳烃比值表明，多环芳烃化合物来自热解源，更具体地说是燃烧过程。尽管在过去几十年中有所减少，但在法国北部焦炭炉和冶炼厂大量消耗煤炭并将其用于家庭取暖，支持了这一说法。沉积物和沉积物质中的多氯二苯并对二恶英/呋喃指纹表明 OCDD 是主要的同系物。此外，过去五氯苯酚（PCP）的使用导致我们的沉积物样本中多氯二苯并对二恶英/呋喃的含量略有增加。非邻位多氯联苯构成了在沉积物中观察到的总 TEQ 浓度的重要部分。自 20 世纪 80 年代和 90 年代以来，多氯二苯并对二恶英/呋喃的沉积物浓度显著降低，但多环芳烃则不然。
