Hidrocarbonetos e esterois como indicadores de fontes e destino de matéria orgânica em sedimentos da Baía de Sepetiba, Rio de Janeiro

Química Nova

Renato S. Carreira²  Patrícia V. Ribeiro²  Carlos E. M. Silva²  Cassia O. Farias¹ 

[1] ,Universidade do Estado do Rio de Janeiro Faculdade de Oceanografia Rio de Janeiro RJ ,Brasil

关键词: Sepetiba Bay;    sediments;    organic matter;   

DOI  :  10.1590/S0100-40422009000700023

来源: SciELO

【 摘 要 】

The inputs of organic matter derived from natural and anthropogenic sources to Sepetiba Bay were investigated by using aliphatic hydrocarbons and sterols in superficial sediments. Concentrations ranged from 0.26 to 2.65 μg g-1, <0.01 to 17.41 μg g-1 and 0.77 and 9.24 μg g-1 for n-alkanes, UCM (unresolved complex mixture) and total sterols, respectively. The selected markers and ratios among individual compounds showed the major contribution of terrestrial sources to the total pool of sedimentary organic matter in the bay, but the accumulation of autochthonous organic matter increased with distance from the shoreline. The input of petroleum hydrocarbons and sewage (coprostanol in the range 0.01 to 0.43 μg g-1) were also detected, especially in the more urbanized regions of the bay, but at lower levels of contamination when compared to estuaries in other Brazilian coastal regions.

【 授权许可】

CC BY-NC   
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