CNR-Istituto di Scienze Marine, Via Gobetti 101, 40129 Bologna, Italy.
Mar Pollut Bull. 2011 May;62(5):1013-24. doi: 10.1016/j.marpolbul.2011.02.035. Epub 2011 Mar 12.
PCBs were analysed in surficial sediments and selected sediment cores collected between 2002 and 2008 in Central Vietnam coastal lagoons. The aim was to determine contamination levels and trends, and to evaluate the effects of anthropogenic pressures and natural events. Samples were mostly fine-grained with low total PCB concentrations (0.367-44.7 μg kg(-1)). Atmospheric transport and post depositional processes modify to some degree the fingerprint of PCB inputs to the environment favouring the predominance of 3, 4 and 5 chlorinated congeners. The similarity of congener distributions in contemporary surficial samples also suggests the presence of a unique source over the entire study area, probably connected to mobilisation and long range transports from land-based stocks. The removal of consistent sediment layers is hypothesised based on repeated samplings of the same area. Natural meteorological events (such as typhoons) are suspected to be responsible for these sediment losses.
在越南中部沿海泻湖的表层沉积物和 2002 年至 2008 年间采集的选定沉积物芯中分析了多氯联苯。目的是确定污染水平和趋势，并评估人为压力和自然事件的影响。样品主要是细颗粒，总 PCB 浓度较低（0.367-44.7μgkg(-1)）。大气传输和沉积后过程在某种程度上改变了 PCB 输入环境的特征，有利于 3、4 和 5 氯代同系物的优势。在当代表层样本中，同系物分布的相似性也表明，在整个研究区域存在一个独特的污染源，可能与从陆基库存中动员和长距离运输有关。基于对同一区域的重复采样，假设去除了一致的沉积层。人们怀疑自然气象事件（如台风）是造成这些沉积物损失的原因。
