Antibiofilm effect of mono‐rhamnolipids and di‐rhamnolipids on carbon steel submitted to oil produced water

• Published in: Biotechnology progress 2021-05, Vol.37 (3), p.e3131-n/a
• Main Authors: Rocha, Vanessa Alves Lima, Castilho, Lívia Vieira Araujo, Castro, Rui de Paula Vieira de, Teixeira, Douglas Braga, Magalhães, Augusto Vieira, Abreu, Fernanda de Avila, Cypriano, Jefferson Bomfim Silva, Gomez, José Gregório Cabrera, Freire, Denise Maria Guimarães
• Format: Article
• Language: English
• Subjects: biofilm; Biofilms; Biofilms - drug effects; Carbon - chemistry; Carbon steel; Carbon steels; Conditioning; Congeners; Contact angle; Corrosion prevention; Decanoates - pharmacology; di‐rhamnolipid; Glycolipids - pharmacology; Hydrophobic and Hydrophilic Interactions; Hydrophobicity; mono‐rhamnolipid; Oil and Gas Industry; oil produced water; Oils; Polarity; Pollutants; Pseudomonas aeruginosa; Rhamnolipids; Rhamnose - analogs & derivatives; Rhamnose - pharmacology; Scanning electron microscopy; Steel; Steel - chemistry; Surfactants; Water
• ISSN: 8756-7938; 1520-6033
• DOI: 10.1002/btpr.3131

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