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首页> 外文期刊>Journal of the Brazilian Chemical Society >Input of organic matter in a large south american tropical estuary (Paranaguá Estuarine System, Brazil) indicated by sedimentary sterols and multivariate statistical approach
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Input of organic matter in a large south american tropical estuary (Paranaguá Estuarine System, Brazil) indicated by sedimentary sterols and multivariate statistical approach

机译：沉积甾醇和多元统计方法表明，南美一个大型热带河口（巴西巴拉那瓜河口系统）中的有机物输入

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摘要

The Paranaguá Estuarine System is one of the most important environments of the South American coast. Fishing, urban and tourist activities, industries, sewage and the main shipping port for the export of grains in Brazil are sources of environmental impacts. The sources of sedimentary organic matter were evaluated by sterol concentrations which were obtained by gas chromatography with a mass spectrometer (GC-MS). The coprostanol levels were comparatively low, except at sites close to Paranaguá City, where high concentrations have shown sewage contamination. The principal component analysis showed the distinction between sterols from marine (cholesterol, cholestanol, stigmasterol and campesterol), fecal (coprostanol and epicoprostanol) and terrigenous inputs (β-sitosterol). The sterol composition of the sediments indicated that the estuary system is an embayment dominated by inputs of marine organic matter associated with phytoplankton. Terrestrial inputs were detected only at sites close to mangroves, uncontaminated rivers and semi-closed inlets. Fecal input is restricted around Paranaguá City.
机译：巴拉那瓜河口系统是南美海岸最重要的环境之一。巴西的渔业，城市和旅游活动，工业，污水和谷物出口的主要航运港是环境影响的来源。通过固醇浓度评估沉积有机物的来源，该固醇浓度通过质谱仪（GC-MS）通过气相色谱法获得。除了在巴拉那瓜市附近的高浓度地区已显示出污水污染的地区外，coprostanol的水平相对较低。主成分分析表明，海洋中的甾醇（胆固醇，胆固醇，豆甾醇和菜油甾醇），粪便中的固醇（异前列腺素和表异前列腺素）与陆源性输入物（β-谷甾醇）之间存在差异。沉积物的固醇成分表明，河口系统是一个与浮游植物有关的海洋有机物输入所主导的河床。仅在靠近红树林，未受污染的河流和半封闭入口处发现了地面输入。巴拉那瓜市周围的粪便输入受到限制。

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