Federal University of Santa Maria, Department of Physiology and Pharmacology, Av. Roraima, 1000, Camobi, 97105-900 Santa Maria, RS, Brazil.
Federal University of Santa Maria, Department of Chemistry, Av. Roraima, 1000, Camobi, 97105-900 Santa Maria, RS, Brazil.
An Acad Bras Cienc. 2024 Aug 26;96(suppl 2):e20231140. doi: 10.1590/0001-3765202420231140. eCollection 2024.
The aim of this study is to analyze the waterborne metal levels in four lakes (one endorheic and three exorheic) of Harmony Point, Nelson Island, Antarctica. Water samples were analyzed by using a quadrupole type inductively coupled plasma mass spectrometer and an inductively coupled plasma optical emission spectrometer. The levels of As, Cu, Mn, Mo, and V were significantly lower and those of Cr, Mg, Na, and Sr were significantly higher in the endorheic lake than in the other lakes. Most water samples presented levels of Ag, Be, Cd, Pb, Se, Tl, and U below the limit of quantification, while for Ba, Co, and Ni around half of the samples were below this limit. The waterborne metal levels were not significantly different between the exorheic lakes. Waterborne metal levels in the freshwater lakes from Harmony Point did not show any clear relationship with their levels in the soil of the region or with bird guano, and overall, their levels indicate an environment without anthropogenic influence. Apparently, the Na levels are influenced by salt spray from the ocean, as they are related to the distance of the lakes from the ocean.
本研究旨在分析南极洲纳尔逊岛和谐点四个湖泊（一个内陆湖和三个外流湖）的水中金属含量。水样采用四级电感耦合等离子体质谱仪和电感耦合等离子体发射光谱仪进行分析。与其他湖泊相比，内陆湖中砷、铜、锰、钼和钒的含量明显较低，而铬、镁、钠和锶的含量明显较高。大多数水样中银、铍、镉、铅、硒、碲和铀的含量低于定量限，而钡、钴和镍的一半左右样品低于定量限。外流湖中水中金属含量没有明显差异。来自和谐点的淡水湖中水中金属含量与其所在地区土壤或鸟类粪便中的金属含量没有明显关系，总体而言，其含量表明该地区没有受到人为影响。显然，钠含量受来自海洋的盐雾影响，因为它们与湖泊距海洋的距离有关。
