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摘要:
In N’Djaména, the use and marketing of certain hydrocarbons does not comply with any standard in force or with regulations provided for this purpose. Their evaporation and unregulated release into the wild significantly affects the ecosystem. The present work consists in developing a method of extraction from sediments polluted by bio surfactant (rhamnolipid) assisted by microwaves. The goal here is to look for the presence of polycyclic aromatic hydrocarbons in polluted sediments. The rhamnolipid used consists of monorhamnolipids and di-rhamnolipids, its emulsion index is 64.66% and is composed of saturated and unsaturated fatty acids having carbon numbers ranging from 12 to 18. We used the microwave micellar extraction process. It was made by keeping the concentration values fixed at 0.15 g/L and the power at 400 W and more. We observed a positive interaction of the rhamnolipid concentration factors and the power of the microwave to obtain the optimal conditions at the time of 50 S, at the concentration of 0.16 g/L and at the power of 443 W for a rate of optimal extraction of 0.91%. Chromatographic analysis by GC-MS of the optimum extracts allowed us to identify twelve (12) C10 to C43 n-alkanes and eight (8) PAHs. It emerges from this analysis that the rhamnolipid extracts seven (7) Polycyclic Aromatic Hydrocarbons in equivalent proportions while the tween 80 extracts only four (4) Polycyclic Aromatic Hydrocarbons with a high proportion (80.02%) of benzo [a] antracene.
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篇名 The Environmental Impact of Polycyclic Aromatic Hydrocarbons: Mechanism of Extraction by Bio-Surfactant in a Microwave
来源期刊 自然资源(英文) 学科 化学
关键词 MARKETING Polycyclic Aromatic Hydrocarbons RHAMNOLIPID Benzo [a] Antracene and Microwaves
年,卷(期) 2020,(12) 所属期刊栏目
研究方向 页码范围 576-589
页数 14页 分类号 O64
字数 语种
DOI
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研究主题发展历程
节点文献
MARKETING
Polycyclic
Aromatic
Hydrocarbons
RHAMNOLIPID
Benzo
[a]
Antracene
and
Microwaves
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
自然资源(英文)
月刊
2158-706X
武汉市江夏区汤逊湖北路38号光谷总部空间
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78
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0
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