Carvalho Angelo C B, Moreira Vanessa A, Vicente Murilo de C, Bidone Edison Dausacker, Bernardes Marcelo C, Sabadini-Santos Elisamara
Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense - UFF, 24.020-141 Niterói, RJ, Brazil.
Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense - UFF, 24.020-141 Niterói, RJ, Brazil.
Mar Pollut Bull. 2022 Aug;181:113899. doi: 10.1016/j.marpolbul.2022.113899. Epub 2022 Jul 12.
Southeast Brazilian bays have been increasingly degraded by untreated organic loads. Therefore, to assess fecal contamination status, sediment quality regarding polycyclic aromatic hydrocarbons (PAHs), and sources of organic matter (OM), we have determined fine-grained and total organic carbon (TOC) content and concentrations of PAHs and sterols in twenty-six surface sediment samples in Sepetiba Bay. The fine-grained (1-26 %), TOC (0.20-3.45 %), PAHs (<LQ - 78.27 ng g) and sterols (0.10-21.58 μg g) results showed a decreasing trend from the internal to the external sector of the study area. The diagnostic ratios of selected PAHs and sterols indicated a mixture with significant contribution from continental and pyrolytic OM in all stations. The fecal contamination is significant to the internal sector of Sepetiba Bay. Considering a site-specific sediment quality guidelines (SQGs) the PAHs levels with more restricted benchmark values indicate the harbor and the internal sector as contaminated.
巴西东南部的海湾因未经处理的有机负荷而日益退化。因此，为了评估粪便污染状况、多环芳烃（PAHs）的沉积物质量以及有机物质（OM）的来源，我们测定了塞佩蒂巴湾26个表层沉积物样本中的细颗粒和总有机碳（TOC）含量、PAHs和甾醇的浓度。细颗粒（1 - 26%）、TOC（0.20 - 3.45%）、PAHs（<检测限 - 78.27 ng/g）和甾醇（0.10 - 21.58 μg/g）的结果显示，从研究区域的内部到外部呈下降趋势。选定的PAHs和甾醇的诊断比率表明，所有站点的混合物中大陆和热解OM的贡献显著。粪便污染对塞佩蒂巴湾的内部区域影响显著。考虑到特定地点的沉积物质量指南（SQGs），具有更严格基准值的PAHs水平表明港口和内部区域受到污染。
