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Evaluation of Aliphatic Hydrocarbons in Surface Sediments of Lagoa Mirim (RS, Brazil)
Bulletin of Environmental Contamination and Toxicology ( IF 2.7 ) Pub Date : 2021-08-11 , DOI: 10.1007/s00128-021-03343-z
Júlia Arduim 1 , Maria Alice Farias da Silva Amaral 1 , Gabriela Oliveira Andrade 1 , Camila Kaezynski Rockenbach 1 , Pedro José Sanches Filho 1
Affiliation  

In this study, the hydrocarbons (HCs) levels in sediments from Lagoa Mirim, situated in the south of Brazil, were verified. The methodology brought together stages of pre-sonification, soxhlet extraction, and determination by gas chromatography coupled with mass spectrometry (GC/MS). Ten sample points were evaluated where ∑n-alkanes varied between 1.46 µg kg−1 ± 4.0% and 10.10 µg kg−1 ± 17.6%. Diagnostic indexes were calculated, being: Carbon Preferential Index (CPI), terrestrial/aquatic ratio (TAR), unresolved complex mixture (UCM), UCM/∑n-alkanes ratio, and n-alkane ratio with Low molecular weight hydrocarbon and High molecular weight hydrocarbons (HMW/LMW). In general, the results of this study indicate a low anthropogenic impact in the environment.



中文翻译:

Lagoa Mirim(RS,巴西)地表沉积物中脂肪烃的评价

在这项研究中,验证了位于巴西南部的 Lagoa Mirim 沉积物中的碳氢化合物 (HC) 水平。该方法汇集了预超声、索氏提取和气相色谱与质谱联用 (GC/MS) 测定的各个阶段。评估了 10 个样品点,其中 ∑ n -烷烃在 1.46 µg kg -1  ± 4.0% 和 10.10 µg kg -1  ± 17.6% 之间变化。计算诊断指标,为:碳优先指数 (CPI)、陆地/水生比率 (TAR)、未解析的复杂混合物 (UCM)、UCM/∑ n -烷烃比率和n-烷烃与低分子量烃和高分子量烃的比率 (HMW/LMW)。总的来说,这项研究的结果表明,人为对环境的影响很小。

更新日期:2021-08-11
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