Baptista Neto José Antônio, da Costa Campos Thomas Ferreira, de Andrade Carala Danielle Perreira, Sichel Susanna Eleonora, da Fonseca Estefan Monteiro, Motoki Akihisa
Departamento de Geologia, Universidade Federal Fluminense, Av. General Milton Tavares de Souza, 24210-346, Niterói, RJ, Brazil,
Environ Geochem Health. 2014 Dec;36(6):1199-203. doi: 10.1007/s10653-014-9623-6. Epub 2014 May 22.
This work reports on the widespread occurrence of tar balls on a pebble beach of Sueste Bay on Fernando de Noronha Island, a Brazilian national marine park and a preserve in the South Equatorial Atlantic. Environmental regulations preclude regular visitors to the Sueste Bay beach, and the bay is a pristine area without any possible or potential sources of petroleum in the coastal zone. In this work, these tar balls were observed for the first time as they occurred as envelopes around beach pebbles. They are black in color, very hard, have a shell and coral fragment armor, and range in average size from 2 to 6 cm. The shape of the majority of the tar balls is spherical, but some can also be flattened ellipsoids. The polycyclic aromatic hydrocarbon analyses of the collected samples revealed the characteristics of a strongly weathered material, where only the most persistent compounds were detected: chrysene, benzo(b,k)fluoranthene, dibenzo(a,h)antracene and benzo(a)pyrene.
这项研究报告了在巴西国家海洋公园、南赤道大西洋保护区费尔南多·迪诺罗尼亚岛苏埃斯特湾的卵石海滩上广泛存在焦油球的情况。环境法规限制了对苏埃斯特湾海滩的定期访问，该海湾是一个原始区域，沿海地带没有任何可能或潜在的石油来源。在这项研究中，首次观察到这些焦油球，它们以包裹在海滩卵石周围的形式出现。它们呈黑色，非常坚硬，有外壳和珊瑚碎片覆盖，平均大小在2至6厘米之间。大多数焦油球的形状是球形，但也有一些可能是扁平的椭球体。对收集样本的多环芳烃分析揭示了一种强烈风化物质的特征，仅检测到了最持久的化合物：芘、苯并(b,k)荧蒽、二苯并(a,h)蒽和苯并(a)芘。
