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首页> 外文期刊>International Journal of Geosciences >Sedimentary and Geochemical Aspects of a Refinery Impacted Coastal Area: A Case Study of the Todos os Santos Bay (Bahia, Brazil)
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Sedimentary and Geochemical Aspects of a Refinery Impacted Coastal Area: A Case Study of the Todos os Santos Bay (Bahia, Brazil)

机译：炼油厂影响沿海地区的沉积和地球化学方面：以Todos os Santos湾为例（巴西巴伊亚州）

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The present study was performed in the northeast portion of the Todosos Santos Bay, Bahia State, Brazil, an area under influence of the Landulpho Alves-Mataripe (RLAM) refinery effluents. The aim of this work is to evaluate the modern sedimentary processes based on grain-size analysis, calcium carbonate and sedimentary organic matter concentration and behavior considering the possible effects of the petroleum industry’s refining on these sediments. The concentrations and variations of the three main constituents of organic matter (total organic C, total N and organic P), and the resulting elemental ratios (C/N, C/P and N/P), were studied on a seasonal spatial and temporal scale (winter 2004 and summer 2005), therefore subsidizing the environmental analysis, especially in regards to the benthic ecosystem. Fifty samples from twenty-five sampling stations were collected with a grab sampler. Well sorted sandy sediments are observed in coastal sampling stations and in the Caboto channel. The recent deposition of fine sediments was observed especially in the west and central portions of study area. However, these spots contain the highest percentages of organic material, which do not present significant seasonal and spatial variations, revealed by the values of total organic C which reach values of up to 3.1%, total N (0.01% to 0.15%) and the organic P contents that reach a maximum of 15.9 μmol·g-1. In general, the elemental ratios indicated continental organic matter inputs, probably derived from human activities.
机译：本研究是在巴西巴伊亚州Todosos Santos湾的东北部进行的，该地区受到Landulpho Alves-Mataripe（RLAM）炼油厂废水的影响。这项工作的目的是基于粒度分析，碳酸钙和沉积有机物的浓度和行为来评估现代沉积过程，同时考虑到石油工业精炼对这些沉积物的可能影响。在季节性的空间和空间条件下研究了有机质的三个主要成分（总有机碳，总氮和有机磷）的浓度和变化，以及元素比（C / N，C / P和N / P）。时间尺度（2004年冬季和2005年夏季），因此对环境分析提供了补贴，尤其是在底栖生态系统方面。用抓斗取样器收集了来自25个采样站的50个样品。在沿海采样站和Caboto河道中观察到分类良好的沙质沉积物。特别是在研究区域的西部和中部地区，观察到了最近沉积的细小沉积物。但是，这些斑点含有最高百分比的有机物质，没有明显的季节和空间变化，总有机碳的值最高可达3.1 ％，总N（0.01 ％至0.15 ％ ），有机磷含量最高达到15.9μmol·g-1。一般而言，元素比表明大陆有机物输入，可能来自人类活动。

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