Abstract
This paper tackles bacteria of the genus Bacillus as both biodamaging/biodegrading and biocontrolling agents. The article addresses the said bacteria’s ability to form biofilms and corrosive, antimicrobial and antibiofilm proactive compounds, primarily, siderophores. Their role depends on the species, microorganism strain, production of antimicrobial substances, biofilm formation, and the type of damaged material. The bacteria under analysis have demonstrated the ability to cause as well as inhibit biodamage. The involvement of bacteria of the genus Bacillus in microbiologically influenced corrosion processes is determined by the production of corrosive metabolites and the impact of certain bioelectrochemical mechanisms. Lipopeptides generated by Bacillus subtilis (surfactin, iturin and fengycin) are capable of modifying surfaces’ hydrophobic properties and impacting the microbes’ adhesion to surfaces. Produced by Bacillus velezensis, the siderophore bacillibactin at a high concentration is capable of inhibiting the formation of bacterial biofilms, thus slowing down the degradation of materials. Further study of siderophores as green inhibitors of microbiologically influenced corrosion may be promising as the said compounds possess antibiofilm-forming properties and high-intensity inhibitory capabilities.
Highlights
In the context of rapid development of technology and construction, as well as creation of new materials, the issue of material biodamage and appropriate protection appears as the focus of substantial research [1,2,3]
The processes of biodegradation involve chemical elements in geochemical cycles leading to the removal of xenobiotics from the environment [3]
The influence of Bacillus mycoides (B. mycoides) upon samples of Zn, Al and steel was studied over 2 years under controlled humidity (97%) and temperature (26 ◦C) [23]
Summary
In the context of rapid development of technology and construction, as well as creation of new materials, the issue of material biodamage and appropriate protection appears as the focus of substantial research [1,2,3]. Bactericides have traditionally been used to prevent microbiologically influenced corrosion (MIC), they pose health, safety and environmental problems [4]. Sulfate-reducing bacteria (SRB) are most commonly associated with MIC, while little attention has far been paid to the representatives of other taxonomic groups [7]. Bacteria of the genus Bacillus deserve attention both as biodamaging/biodegradable and biocontrolling agents, as they are able to form corrosive compounds [8], polymer-degrading compounds [9], antimicrobials [10] and antibiofilm-forming compounds [11]. This paper provides analysis of Bacillus’s impact upon some metals and extensively used synthetic plastics as biodamage/biodegradation agents
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