Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (UFBA), Rua Barão de Geremoabo, s/n, Campus de Ondina, CEP 40170-270 Salvador, Bahia, Brazil.
Departamento de Ciências Humanas e Tecnologias, Universidade do Estado da Bahia, Salvador, Bahia, Brazil.
Mar Pollut Bull. 2021 Feb;163:111953. doi: 10.1016/j.marpolbul.2020.111953. Epub 2021 Jan 5.
The Serinhaém River estuary is located in the Environmental Protection Area (EPA) of Pratigi, in the State of Bahia, Brazil, which is recognized for being a relatively well-preserved environment. In this work, the levels of aluminum (Al), arsenic (As), barium (Ba), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), manganese (Mn), nickel (Ni), lead (Pb), vanadium (V), and zinc (Zn) were determined to evaluate the behavior of these chemical elements through geochemical parameters. Eighty-one sediment samples were collected in five sediment cores along the estuarine region. The results of the composition of the Serinhaém river basin showed high levels of Fe, Al, and Mn in the sediment samples. By using Principal Component Analysis, it was observed that 55.8% of the elements have a significant correlation with Fe, Al, and Mn, which may have the same origin or be associated with Fe and Mn oxy-hydroxides, and aluminosilicates. Although Cr, As, and V are correlated with Fe, Mn, and Al, their concentrations are above those established by NOAA, suggesting adverse effects on biota. Barium concentrations increased toward the outfall, where it meets the Camamu Bay, which is naturally enriched with this element. It was also possible to observe that along with the vertical profile, there were no variations in the concentrations of the elements, while along the estuary, it was possible to verify that the cores differ from each other. The estuary of the Serinhaém River can be considered to be influenced relatively little by human activities, and its concentrations can be considered as a base level for this coastal region.
塞里尼亚姆河口位于巴西巴伊亚州普拉提吉的环境保护区（EPA），该地区以环境相对完好而闻名。在这项工作中，测定了铝（Al）、砷（As）、钡（Ba）、钴（Co）、铬（Cr）、铜（Cu）、铁（Fe）、锰（Mn）、镍（Ni）、铅（Pb）、钒（V）和锌（Zn）的水平，以通过地球化学参数评估这些化学元素的行为。在沿河口地区的五个沉积物岩心中采集了 81 个沉积物样本。塞里尼亚姆河流域的组成结果显示，沉积物样本中 Fe、Al 和 Mn 的含量较高。通过主成分分析，观察到 55.8%的元素与 Fe、Al 和 Mn 具有显著相关性，这些元素可能具有相同的来源，或者与 Fe 和 Mn 的氢氧化物以及铝硅酸盐有关。尽管 Cr、As 和 V 与 Fe、Mn 和 Al 相关，但它们的浓度高于 NOAA 规定的浓度，表明对生物群有不利影响。钡浓度朝着与卡马穆湾相遇的河口方向增加，该湾自然富含该元素。还可以观察到，随着垂直剖面的变化，元素浓度没有变化，而在河口处，可以验证各个岩心彼此不同。塞里尼亚姆河的河口可以说是受人类活动影响相对较小，其浓度可以被认为是该沿海地区的基础水平。
