Abstract
The Egyptian petroleum industries are incurring severe problems with corrosion, particularly corrosion that is induced by sulfidogenic microbial activities in harsh salinity environments despite extensively using biocides and metal corrosion inhibitors. Therefore, in this study, a synthesized cationic gemini surfactant (SCGS) was tested as a broad-spectrum antimicrobial, anti-bacterial, anti-candida, anti-fungal, anti-biofilm (anti-adhesive), and bio-dispersion agent. The SCGS was evaluated as a biocide against environmental sulfidogenic-bacteria and as a corrosion inhibitor for a high salinity cultivated medium. The SCGS displayed wide spectrum antimicrobial activity with minimum bactericidal/fungicidal inhibitory concentrations. The SCGS demonstrated anti-bacterial, anti-biofilm, and bio-dispersion activity. The SCGS exhibited bactericidal activity against environmental sulfidogenic bacteria and the highest corrosion inhibition efficiency of 93.8% at 5 mM. Additionally, the SCGS demonstrated bio-dispersion activity against the environmental sulfidogenic bacteria at 5.49% salinity. In conclusion, this study provides a novel synthesized cationic surfactant with many applications in the oil and gas industry: as broad-spectrum antimicrobial and anti-biofilm agents, corrosion inhibition for high salinity, biocides for environmentally sulfidogenic bacteria, and as bio-dispersion agents.
Highlights
The oil and gas industries are suffering from many corrosion problems that are induced by high salinity corrosive environments and sulfidogenic microbial activities, in bulk phases and on metal surfaces, corrosion inhibitors and biocides are extensively used
The synthesized cationic gemini surfactant (SCGS) [16] was applied as a broad antimicrobial agent against standard microbial strains
The well with no color change means negative result or oxidation-reduction indicator at a concentration of 0.015%
Summary
The oil and gas industries are suffering from many corrosion problems that are induced by high salinity corrosive environments and sulfidogenic microbial activities, in bulk phases and on metal surfaces, corrosion inhibitors and biocides are extensively used. Cationic surfactants (in an aqueous media) possess high surface-active properties, and their hydrophilic parts carry positive charges. Gemini surfactants exhibit higher surface-active properties, a lower critical micelle concentration (CMCc ), better foaming, better wetting, and stronger anti-microbial Molecules 2020, 25, 1348 spectrum) and anti-adhesive activities as compared to the corresponding monomeric surfactants [3,4,5]. They display lower biodegradability properties than monomeric surfactants
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