Grupo de Bioxeoquímica Mariña, Instituto de Investigacións Mariñas (CSIC), 36208 Vigo, Spain.
Mar Pollut Bull. 2011 Mar;62(3):646-50. doi: 10.1016/j.marpolbul.2010.12.018. Epub 2011 Jan 21.
Platinum contamination in estuarine and coastal sediments has been evaluated in three cores collected from the Tagus Estuary and Prodelta shelf sediments. Elevated concentrations, up to 25-fold enrichment compared to background values, were found in the upper layers of the estuarine sediments. The degree of Pt enrichment in the estuarine sediments varied depending on the proximity to vehicular traffic sources, with a maximum concentration of 9.5 ng g(-1). A considerable decrease of Pt concentrations with depth indicated the absence of significant contamination before the introduction of catalytic converters in automobiles. Platinum distribution in the Tagus Prodelta shelf sediment core showed no surface enrichment; instead a sub-surface maximum at the base of the mixed layer suggested the possibility of post-depositional mobility, thereby blurring the traffic-borne contamination signature in coastal sediments.
已在取自塔霍河口和河口前缘沉积区的 3 个岩芯中对河口和滨海沉积物中的铂污染进行了评估。在河口沉积物的上层发现了铂的高浓度，最高可达背景值的 25 倍。河口沉积物中的铂富集程度取决于与车辆交通源的接近程度，最大浓度为 9.5ng/g。随着深度的增加，铂浓度的显著降低表明在汽车中引入催化转化器之前，不存在明显的污染。塔霍河口前缘沉积区岩芯中铂的分布没有表面富集；相反，混合层底部的次表层最大值表明了可能存在后沉积迁移，从而使滨海沉积物中的交通携带污染特征变得模糊。
