Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará, Augusto Correa n°1, 66075-110 Belém, Pará, Brazil.
Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará, Augusto Correa n°1, 66075-110 Belém, Pará, Brazil.
Mar Pollut Bull. 2022 Mar;176:113425. doi: 10.1016/j.marpolbul.2022.113425. Epub 2022 Feb 18.
Mercury (Hg) is a toxic globally spread pollutant that has been found at increasing concentrations in the South Atlantic Ocean. The present work provides the first insight into the total mercury (HgT, unfiltered waters) content in the water of the Brazilian Exclusive Economic Zone (BEEZ), within a 24°S to 20°S. Water samples were collected from surface to 3400 m depth along transects, and analyzed with atomic fluorescence. The mean HgT concentration for the Tropical Water mass (TW) was 6.3 ± 1.4 pM (n = 16), for the South Atlantic Central Water (SACW), 5.9 ± 0.7 pM (n = 8), for the Antarctic Intermediate Water (AAIW), 5.0 ± 0.6 pM (n = 2), for the Upper Circumpolar Deep Water (UCDW), 6.5 pM (n = 1), and for the North Atlantic Deep Water (NADW), 5.7 ± 0.9 pM (n = 12). HgT concentrations were highest throughout the BEEZ in comparison with other parts of the Atlantic Ocean, farther from the coast.
汞（Hg）是一种具有全球性分布的有毒污染物，在南大西洋的浓度不断增加。本研究首次提供了南大西洋巴西专属经济区（BEEZ）范围内总汞（HgT，未过滤水）含量的见解，其范围为南纬 24°至 20°。在横截线上，从表层到 3400 米深度采集水样，并使用原子荧光法进行分析。热带水团（TW）的平均 HgT 浓度为 6.3±1.4 pM（n=16），南大西洋中央水（SACW）为 5.9±0.7 pM（n=8），南极中层水（AAIW）为 5.0±0.6 pM（n=2），上环球深水区（UCDW）为 6.5 pM（n=1），北大西洋深层水（NADW）为 5.7±0.9 pM（n=12）。与大西洋其他远离海岸的地区相比，BEEZ 内的 HgT 浓度在整个区域都最高。
