Assessment of the health quality of Ria de Aveiro (Portugal): heavy metals and benthic foraminifera.-猫眼课题宝

DOI：

10.1016/j.marpolbul.2013.02.003

发表时间：

2013-05

期刊：

Marine pollution bulletin

影响因子：

5.8

通讯作者：

中科院分区：

环境科学与生态学3区

文献类型：

作者：

V. Martins;F. Frontalini;K. M. Tramonte;R. Figueira;P. Miranda;C. Sequeira;Sandra Fernández-Fernández-Sandra-Fernández-Fernández-1470841581;J. Dias;C. Yamashita;Raquel Renó;L. Laut;F. Silva;M. A. Rodrigues;C. Bernardes;R. Nagai;S. Sousa;M. Mahiques;B. Rubio;A. Bernabéu;D. Rey;F. Rocha

本工作分析了Ria de Aveiro（葡萄牙）沉积物中重金属的分布，通过对沉积物的总消化和顺序化学提取进行了评估。研究了环境参数对底栖有孔虫组合的影响。Ria de Aveiro污染最严重的部分是停留时间长和粘性沉积物沉积的地区。有机物质是许多金属的极好清除者，通常在这个泻湖的较细沉积物中更为丰富，这些沉积物充当了人为污染物的汇。这种情况在Aveiro运河和Murtosa水道中观察到，那里的沉积物中含有最高浓度的Zn， Pb， Cu和Cr。Murtosa河道沉积物也富含As、Co和Hg。在Aveiro河道中，重金属的富集主要与河道边缘过去的工业生产（陶瓷和冶金）有关，而在Murtosa河道中，重金属的富集与Estarreja化学联合体的污水排放有关。有孔虫密度和多样性在海洋影响较大的泻湖口附近达到较高的值，在极低氧条件下一般会下降。有些物种似乎对TOC的增加不感兴趣（如德国海蝇和温水氨），有些物种在氧气水平非常低的地区有机会性行为（如温水拟南蝽和半沼拟南蝽），而其他物种可以更好地忍受硫化物/还原条件（如德国海蝇、普通玻利维亚、秀丽Buliminella elegantissima、长尾Bulimina /gibba和Nonionella stella），这是该泻湖普遍存在的条件。有孔虫密度及部分种类与重金属浓度呈负相关。鉴定出一种对高浓度重金属最敏感的物种（如普通白僵菌、假僵菌和长僵菌/长臂猿）和另一种耐受性较强的物种（如德国白僵菌、A. tepida和半长僵菌）。相比于黏土矿物（F1）和铁锰氧化物（F2）以及F2中的铅，有孔虫在任何相中都更能耐受较高的有效锌浓度（AC）；F2相，可能是最具流动性的相，甚至F1相似乎比有机物中金属的增加（F3）更具毒性。

This work analyses the distribution of heavy metals in the sediments of Ria de Aveiro (Portugal) assessed by total digestion and sequential chemical extraction of the sediments. The influence of environmental parameters on the living benthic foraminiferal assemblages was studied. The most polluted parts in the Ria de Aveiro are areas where the residence time is high and cohesive sediments are deposited. Organic matter, which is an excellent scavenger for a number of metals, is in general more abundant in the finer deposits of this lagoon, which act as sinks of anthropogenic pollutants. This condition is observed in Aveiro canals and Murtosa channel where sediments with the highest concentrations of Zn, Pb, Cu, and Cr are found. The sediments of Murtosa channel are also enriched in As, Co and Hg. In Aveiro canals the enrichment of heavy metals is mostly related to the past industrial production at their margins (ceramic and metallurgy), whereas in Murtosa channel with effluent discharges of the Chemical Complex of Estarreja. Foraminiferal density and diversity reach higher values near the lagoon mouth under higher marine influence and decline in general under very low-oxygen conditions. Some species seems to be indifferent to the increasing of TOC (e.g. Haynesina germanica and Ammonia tepida) and some have an opportunistic behaviour in areas with very depressed levels of oxygen (e.g. A. tepida and Quinqueloculina seminulum) whereas other species can better tolerate sulphide/reducing conditions (e.g. H. germanica, Bolivina ordinaria, Buliminella elegantissima, Bulimina elongata/gibba and Nonionella stella) a widespread condition in this lagoon. Foraminiferal density and some species are negatively correlated with concentrations of heavy metals. A most sensitive group of species to higher concentrations of heavy metals is identified (such as B. ordinaria, B. pseudoplicata and B. elongata/gibba) and another one of more tolerant species (such as H. germanica A. tepida and Q. seminulum). Foraminifera are more tolerate higher available concentrations (AC) of Zn in any phase than higher AC of Cu adsorbed do clay minerals (F1) and associated with Fe and Mn oxides (F2) and of Pb in F2; the phase F2, probably the most mobile phase, and even phase F1 seems to be more toxic than the increasing of metals in organic matter (F3).

Assessment of the health quality of Ria de Aveiro (Portugal): heavy metals and benthic foraminifera.

文献摘要

被引文献

相似文献