Centro Interdisciplinar de Energia e Ambiente (CIENAM), Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, Salvador, BA 40170-290, Brazil.
Centro Interdisciplinar de Energia e Ambiente (CIENAM), Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, Salvador, BA 40170-290, Brazil.
Mar Pollut Bull. 2017 Dec 15;125(1-2):459-471. doi: 10.1016/j.marpolbul.2017.07.053. Epub 2017 Aug 8.
The evolution of the impacts of anthropogenic activities in Todos os Santos Bay was evaluated by profiles of trace metals and Pb isotopes determined in sediment cores. Fluxes of metals increased up to 12, 4 and 2 times for Cu, Pb, and Zn, respectively, compared to those recorded in the beginning of the 20 century. Stable Pb isotopes identified a decommissioned lead smelter and burning of fossil fuels as the main sources of Pb. Most metals showed minor to moderate enrichment factors (EF<4), but Cu and Pb were highly enriched (EF=28 and 6, respectively) at the Aratu harbor. Temporal changes in sediments were associated to different activities, namely Pb smelting, burning of fossil fuels, maritime traffic, petroleum related activities, inputs of domestic effluents, and changes in land uses. The effects of the implementation of environmental policies to improve the waters of the bay could not be identified in the evaluated cores.
通过在沉积岩心物中测定痕量金属和铅同位素的分布，评估了人类活动对万圣湾影响的演变。与 20 世纪初的记录相比，铜、铅和锌的通量分别增加了 12、4 和 2 倍。稳定的铅同位素确定了一个废弃的铅冶炼厂和化石燃料的燃烧是铅的主要来源。大多数金属的富集因子（EF<4）较小，但在阿图港，铜和铅的富集程度较高（EF=28 和 6）。沉积物中的时间变化与不同的活动有关，即铅冶炼、化石燃料燃烧、海上交通、石油相关活动、生活污水的排放以及土地利用的变化。在所评估的岩心中，无法确定实施环境政策以改善该湾水质的效果。
