Laboratory of Petroleum Studies, Geoscience Institute, Federal University of Bahia, Rua Barão de Jeremoabo, s/n, 40170-020 Salvador, BA, Brazil; Laboratory of Marine Geochemistry, Geoscience Institute, Federal University of Bahia, Rua Barão de Jeremoabo, s/n, 40170-020 Salvador, BA, Brazil.
Laboratory of Petroleum Studies, Geoscience Institute, Federal University of Bahia, Rua Barão de Jeremoabo, s/n, 40170-020 Salvador, BA, Brazil.
Mar Pollut Bull. 2018 Dec;137:399-407. doi: 10.1016/j.marpolbul.2018.10.040. Epub 2018 Oct 23.
The present study aimed to evaluate the distribution and origin of 16 Priority PAHs in surficial sediment samples of Todos os Santos Bay (TSB, Brazil). Total PAHs concentrations ranged from below the method detection limit (<DL) to 533 ng g (dry weight). The toxic equivalent concentrations (TEQ) of PAHs in the studied area ranged from 0 to 104 ng g and were lower when compared to other contaminated bays in the world. Diagnostic ratios indicated that pyrogenic processes, such as pyrolysis of fossil fuel, biomass, and coal, were the main PAHs sources for sediments. Proximity of the sources, the hydrodynamics and geochemistry of the sediments were the factor influencing the distribution of PAHs along the studied area.
本研究旨在评估 Todos os Santos 湾（巴西）表层沉积物中 16 种优先多环芳烃的分布和来源。多环芳烃总浓度范围为低于方法检测限（<DL）至 533ng/g（干重）。研究区域多环芳烃的毒性等效浓度（TEQ）范围为 0 至 104ng/g，与世界上其他受污染的海湾相比较低。诊断比值表明，源自热解化石燃料、生物质和煤等过程的多环芳烃是沉积物的主要来源。来源的接近程度、沉积物的水动力和地球化学是影响多环芳烃在研究区域分布的因素。
