Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (UFBA), Rua Barão de Jeremoabo, s/n, 40170-290 Salvador, Bahia, Brazil.
Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (UFBA), Rua Barão de Jeremoabo, s/n, 40170-290 Salvador, Bahia, Brazil.
Mar Pollut Bull. 2021 May;166:112179. doi: 10.1016/j.marpolbul.2021.112179. Epub 2021 Feb 23.
The northern and northeastern portion of the Todos os Santos Bay (TSB) is known for the presence of an oil refinery in addition to the development of other activities with significant potential for impact on the environment. 30 samples of superficial mangrove sediment were collected in two different locations: on the banks of the São Paulo River near the Landulpho Alves Mataripe Refinery (RLAM) and at Caboto Beach, a place that was once a control point in studies of metal pollution. After the determination of potentially toxic elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Ti, V, Zn), the quality of the sediment was evaluated using the concentrations of these elements associated with geochemical parameters (TOC, P, S, and granulometry). In this way, the pollution indexes (EF, I, P) were calculated in addition to the comparison with the guide values for the sediment quality (TEL, PEL, ERL, ERM). Among the elements analyzed, Cu also showed levels (92.71-97.54 mg kg) very close to PEL (108 mg kg). At 13 sampling points, Cr concentrations were higher (56.16-66.01 mg kg) than TEL (52.3 mg kg). Ba showed significant concentrations in 6 samples collected on the São Paulo River, a region close to the oil refining area. The enrichment factor (EF) showed that most elements did not show enrichment, except for Zn. Through Igeo there was a tendency towards serious pollution of Ba, Cu, and Zn; moderately polluted by Cr. Principal component analysis (PCA) and Spearman's classification showed a correlation greater than 70% between the variables. According to Nemerow Synthetic Pollution (P), both areas are polluted by Al, Ba, Cr, Cu, Fe, Mn, Ni, Ti, V, and Zn.
托多斯桑托斯湾（TSB）的北部和东北部以圣保罗马拉蒂佩炼油厂（RLAM）的存在以及其他具有重大环境影响潜力的活动为特色。在两个不同的地点采集了 30 个表层红树林沉积物样本：圣保罗河沿岸的拉兰杜尔福·阿尔维斯·马塔里皮炼油厂附近和卡博托海滩，后者曾经是金属污染研究的一个控制点。在确定潜在有毒元素（Al、As、Cd、Cr、Cu、Fe、Mn、Ni、Pb、Ti、V、Zn）后，使用与地球化学参数（TOC、P、S 和粒度）相关的这些元素的浓度来评估沉积物的质量。通过这种方式，计算了污染指数（EF、I、P），并与沉积物质量的指南值（TEL、PEL、ERL、ERM）进行了比较。在所分析的元素中，Cu 的水平（92.71-97.54mgkg）也非常接近 PEL（108mgkg）。在 13 个采样点，Cr 浓度高于 TEL（52.3mgkg）（56.16-66.01mgkg）。在靠近炼油区的圣保罗河上采集的 6 个样本中，Ba 表现出显著的浓度。富集因子（EF）表明，除 Zn 外，大多数元素没有表现出富集。通过 Igeo，Ba、Cu 和 Zn 存在严重污染的趋势；Cr 污染程度中等。主成分分析（PCA）和 Spearman 分类表明，变量之间存在大于 70%的相关性。根据内梅罗综合污染（P），两个地区都受到 Al、Ba、Cr、Cu、Fe、Mn、Ni、Ti、V 和 Zn 的污染。
