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Abstract：
The purpose of the present work was to combine several tools for assessing metal pollution in marine sediments from Cienfuegos Bay. Fourteen surface sediments collected in 2013 were evaluated. Concentrations of As, Cu, Ni, Zn and V decreased respect to those previous reported. The metal contamination was spatially distributed in the north and south parts of the bay. According to the contamination factor (CF) enrichment factor (EF) and index of geoaccumulation (Igeo), Cd and Cu were classified in that order as the most contaminated elements in most sediment. Comparison of the total metal concentrations with the threshold (TELs) and probable (PELs) effect levels in sediment quality guidelines suggested a more worrisome situation for Cu, of which concentrations were occasional associated with adverse biological effects in thirteen sediments, followed by Ni in nine sediments; while adverse effects were rarely associated with Cd. Probably, Cu could be considered as the most dangerous in the whole bay because it was classified in the high contamination levels by all indexes and, simultaneously, associated to occasional adverse effects in most samples. Despite the bioavailability was partially evaluated with the HCl method, the low extraction of Ni (<3% in all samples) and Cu (<55%, except sample 3) and the relative high extraction of Cd (50% or more, except sample 14) could be considered as an attenuating (Ni and Cu) or increasing (Cd) factor in the risk assessment of those element.
摘要：
本工作的目的是结合几种工具来评估Cienfuegos湾海洋沉积物中的金属污染。评估了2013年收集的14种表层沉积物。As的浓度,Cu,Ni,与以前报道的相比，Zn和V有所下降。金属污染物在空间上分布在海湾的北部和南部。根据污染因子（CF）富集因子（EF）和地累积指数（Igeo），Cd和Cu按顺序分类为大多数沉积物中污染最严重的元素。沉积物质量指南中总金属浓度与阈值（TEL）和可能（PEL）影响水平的比较表明，铜的情况更加令人担忧。其中的浓度偶尔与13种沉积物中的不利生物效应有关，9个沉积物中其次是Ni；而不良作用很少与Cd有关。可能,铜可以被认为是整个海湾中最危险的，因为它被所有指标归类为高污染水平，同时,与大多数样品中偶尔的不良反应有关。尽管使用HCl方法部分评估了生物利用度，Ni(在所有样品中<3%)和Cu(<55%，除样品3外)和Cd的相对高提取率(50%或更高，除样品14）外，在这些元素的风险评估中，可以将其视为衰减（Ni和Cu）或增加（Cd）的因素。
