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首页> 外文期刊>Biotechnology Progress >Antibiofilm effect of mono-rhamnolipids and di-rhamnolipids on carbon steel submitted to oil produced water
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Antibiofilm effect of mono-rhamnolipids and di-rhamnolipids on carbon steel submitted to oil produced water

机译：Mono-rhamnolipids和Di-rhamnolipds对油生产水的碳钢上的抗生素效应

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The objective of this study was to compare the potential of mono-rhamnolipids (mono-RML) and di-rhamnolipids (di-RML) against biofilm formation on carbon steel coupons submitted to oil produced water for 14 days. The antibiofilm effect of the RML on the coupons was analyzed by scanning electron microscopy (SEM) and by epifluorescence microscopy, and the contact angle was measured using a goniometer. SEM analysis results showed that all RML congeners had effective antibiofilm action, as well as preliminary anticorrosion evaluation confirmed that all RML congeners prevented the metal deterioration. In more detail, epifluorescence microscopy showed that mono-RML were the most efficient congeners in preventing microorganism's adherence on the carbon steel metal. Image analyses indicate the presence of 15.9%, 3.4%, and <0.1% of viable particles in di-RML, mono/di-RML and mono-RML pretreatments, respectively, in comparison to control samples. Contact angle results showed that the crude carbon steel coupon presented hydrophobic character favoring hydrophobic molecules adhesion. We calculated the theoretical polarity of the RML congeners and verified that mono-RML (log P = 3.63) presented the most hydrophobic character. This had perfect correspondence to contact angle results, since mono-RML conditioning (58.2 degrees) more significantly changed the contact angle compared with the conditioning with one of the most common surfactants used on oil industry (29.4 degrees). Based on the results, it was concluded that rhamnolipids are efficient molecules to be used to avoid biofilm on carbon steel metal when submitted to oil produced water and that a higher proportion of mono-rhamnolipids is more indicated for this application.
机译：本研究的目的是将单rhamolipids（Mono-RML）和DI-RHAMNOLIPID（DI-RML）对碳钢优惠券的碳钢优惠券的潜力进行比较14天。通过扫描电子显微镜（SEM）和通过离荧光显微镜分析RML对优惠券的抗生素效应，并使用测辐射计测量接触角。 SEM分析结果表明，所有RML Congeners都有有效的抗血栓作用，以及初步防腐评估证实，所有RML同源物都阻止了金属劣化。更详细地，渗流荧光显微镜表明，单rML是预防微生物在碳钢金属上粘附的最有效的同源仪。与对照样品相比，图像分析表明，分别在二-RML，单克/二-RML和单rML预处理中存在15.9％，3.4％和<0.1％的活颗粒。接触角结果表明，粗炭钢优惠券呈现疏水性的疏水性，伴有疏水性分子的粘附性。我们计算了RML Congeners的理论极性，并验证了Mono-RML（log p = 3.63）呈现了最疏水性的特征。这完全对应于接触角结果，因为与石油工业上使用的最常见的表面活性剂（29.4度）中最常见的表面活性剂之一更明显地改变接触角的接触角。基于该结果，得出结论是，当提交给油产生的水时，rhamnolipids是用于避免碳钢金属上的生物膜的有效分子，并且对于本申请更加指示更高比例的单核醇。

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