Spatiotemporal Dynamics of Sulfate Reducing Bacteria During Microbial Induced Corrosion PDF Download
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Author: Cody Jay Allen Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
The annual financial impact on the oil and gas industry amounts to tens of billions of dollars, attributable to treatment costs directly and indirectly linked to corrosion. Approximately 20% of these corrosion-related damages are attributed to microbial-induced corrosion. During microbial-induced corrosion, microbes typically promote conditions that produce acids, converting metal oxide layers to a less protective metal sulfide or localizing anode and cathodes on a material. Due to the different disciplines required to research microbial-induced corrosion, different vocabularies and research approaches occur. The lack of clarity resulting from this situation, in turn, causes many questions to go unanswered. Notably, electroactive bacteria are not commonly studied transiently, meaning their growth dynamics' relationship to electrochemical activity over time is poorly understood. The major drawback is that no dynamic live studies are performed, making the distinction between biofilm-influenced corrosion and abiotic corrosion hard to differentiate. The electrode-biofilms interface is either optically or electrochemically researched. The disconnection between biology and electrochemical activity leads to a series of unknown parameters that link them. Lack of understanding of real-time interactions at bio-interface leads to microbial-induced corrosion knowledge gap. Here, we utilize a specially designed biological microelectromechanical microfluidic device, two-working electrode Scanning Electrochemical Microscopy, and molecular imprinted polymer-based sensors to improve the understanding of transient bio-interface interactions. These devices and techniques were established to study three domains: biofilm probing, biofilm dynamics, and biofilm sensing during the initial stages of microbial-induced corrosion. By utilizing these tools, we were able to observe a direct real-time correlation between the morphological characteristics of biofilm and the escalation of corrosion rates in microbial-induced corrosion. Additionally, we also observed the spatial distribution of redox-active quasi-quorum sensing molecules and their direct correlation to the heightened corrosion rates. This research is a significant advancement in our understanding of the complex interplay between microbial activity and corrosion processes, and it provides crucial insights for devising effective corrosion mitigation strategies in a wide range of industrial settings.
Author: Cody Jay Allen Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
The annual financial impact on the oil and gas industry amounts to tens of billions of dollars, attributable to treatment costs directly and indirectly linked to corrosion. Approximately 20% of these corrosion-related damages are attributed to microbial-induced corrosion. During microbial-induced corrosion, microbes typically promote conditions that produce acids, converting metal oxide layers to a less protective metal sulfide or localizing anode and cathodes on a material. Due to the different disciplines required to research microbial-induced corrosion, different vocabularies and research approaches occur. The lack of clarity resulting from this situation, in turn, causes many questions to go unanswered. Notably, electroactive bacteria are not commonly studied transiently, meaning their growth dynamics' relationship to electrochemical activity over time is poorly understood. The major drawback is that no dynamic live studies are performed, making the distinction between biofilm-influenced corrosion and abiotic corrosion hard to differentiate. The electrode-biofilms interface is either optically or electrochemically researched. The disconnection between biology and electrochemical activity leads to a series of unknown parameters that link them. Lack of understanding of real-time interactions at bio-interface leads to microbial-induced corrosion knowledge gap. Here, we utilize a specially designed biological microelectromechanical microfluidic device, two-working electrode Scanning Electrochemical Microscopy, and molecular imprinted polymer-based sensors to improve the understanding of transient bio-interface interactions. These devices and techniques were established to study three domains: biofilm probing, biofilm dynamics, and biofilm sensing during the initial stages of microbial-induced corrosion. By utilizing these tools, we were able to observe a direct real-time correlation between the morphological characteristics of biofilm and the escalation of corrosion rates in microbial-induced corrosion. Additionally, we also observed the spatial distribution of redox-active quasi-quorum sensing molecules and their direct correlation to the heightened corrosion rates. This research is a significant advancement in our understanding of the complex interplay between microbial activity and corrosion processes, and it provides crucial insights for devising effective corrosion mitigation strategies in a wide range of industrial settings.
Author: MB. McNeil Publisher: ISBN: Category : Materials Languages : en Pages : 7
Book Description
Sulfiding corrosion induced by the action of consortia containing sulfate-reducing bacteria (SRB) in biofilms is a problem with most common engineering materials. It is now possible to use a model based on basic thermodynamic reasoning and information on complexation and alteration kinetics to make some predictions about the mineralogy and form of the corrosion products. This analysis, applied to a variety of materials, gives predictions in agreement with experimentation.
Author: CR. Clayton Publisher: ISBN: Category : Materials Languages : en Pages : 12
Book Description
It has long been recognized that sulfate reducing bacteria (SRB) found in natural and industrial waste waters promote microbiologically influenced corrosion (MIC) of certain metals and alloys. Corrosion may be enhanced biologically, through direct enzymatic action of the bacteria, or abiotically, as a result of reaction with metabolic byproducts or changes in local conditions (for example, pH) brought about by bacterial activity. In this study, X-ray photoelectron spectroscopy (XPS) is utilized in conjunction with conventional microbiological and quantitative chemical analytical techniques to analyze the effects of localized environmental conditions similar to those found near the surface of a passive stainless steel on the behavior of SRB, and to determine the ability of these bacteria to alter local environmental conditions in such a way as to create conditions that accelerate corrosion. Specifically, the interactions of Fe, Cr, Ni and Mo ions with Desulfovibrio sp. under anoxic conditions were studied in order to determine the influence of passive dissociation products on the extent of sulfate reduction and to determine the resulting speciation of the metal ions and sulfur. In all cases, XPS revealed the presence of multiple reduced sulfur species (SC2-3, elemental S and S2), as well as reduction of both the molybdate and ferric ions. Localized reduction in pH due to SRB metabolic activity was presumed to play a role in the formation of stable molybdenum disulfide and ferrous species.
Author: Vaibhav Handa Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Sulfate reducing bacteria (SRB) have been reported to obliterate robust metals, including steel. They use a process known as microbiologically influenced corrosion (MIC) to damage civil infrastructure, including bridges and water pipelines. MIC accounts for up to ten percent of the total corrosion costs to the world economy. Quorum sensing (QS) is an inherent mechanism that allows microcosmic communications among the SRB cells. As a result, QS-mediated signaling induces genotypic and phenotypic changes regarding biofilm formation and MIC. The current study addresses the inducing effect of QS molecules (e.g., n-Acetyl homoserine lactone; AHL) on MIC resistance of conformal graphene (Gr) coatings used to protect underlying polycrystalline copper surfaces from corrosive effects of Oleidesulfovibrio alaskensis G20 (OA-G20). Graphene was chosen as a model for emerging protective coatings based on two dimensional (2D) materials. The external augmentation of AHL molecules greatly reduces the lag time required for OA-G20 cells to achieve peak corrosion rates. The transcriptomic analysis revealed that a total of 394 genes were differentially expressed in AHL supplemented condition compared to control, thus promoting the predominant metabolic regulation towards up-regulation pathways. The up-regulated and down-regulated genes were related to phenylalanine-tRNA ligase alpha subunit (4.4-folds - Dde_2635) and metallophos_3 domain-containing protein (4-folds – Dde_3615), respectively. The amino acid biosynthetic pathways and metal containing domain related proteins showed the maximal differential gene expression among all the genes. This fundamental knowledge can be used to design Gr-coatings that rationally consider the QS mechanisms in SRB.
Author: Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
Bacteria play a major role in the processes of biofouling and biocorrosion as members of biofilms and regulators of nutrient cycling in these systems. In these capacities, bacterial communities change temporally and spatially due to consortial interactions. Some bacterial species may facilitate or inhibit development of metabolic capacity of other bacterial species in the biofilm. To fully understand the processes of consortial interactions, therefore, the identity and activity of component species in a consortium must be resolved at the relevant temporal and spatial scales. The objectives of our research were to resolve the temporal and spatial patterns of N2-fixing and sulfate reducing bacteria within a bacterial consortium. Specifically: (1) Develop in situ hybridization techniques (in situ PCR) with fluorescent probes to detect the temporal abundance and spatial distribution of N2-fixing, and sulfate-reducing bacteria in biofilms; (2) Map the spatial distribution of the bacteria using congruently in situ hybridization techniques and confocal microscopy. Several approaches were directed toward Objective I. First, a biofilm was simulated by smearing fixed bacterial cells onto a glass microscope slide. The first experiment used immuno in situ techniques, whereby the anti- nitrogenase antibody was applied to a slide smeared with: (a) V natriegens cells that were harvested when fixing N2, (b) V natriegens cells that were not fixing N2, and (c) the sulfate-reducing bacterium (SRB), D. vulgaris. A strong fluorescent signal was present in the N2-fixing cells, but not in the non-N2-fixing cells or the SRB. The same assemblage of cells also was probed with EUB, a probe specific for a 18 bp conserved region of the SSU in all eubacteria. The 18 bp/rhodamine-coupled probe produced a strong signal in both V natriegens and D. vulgaris.
Author: Larry L. Barton Publisher: Springer Science & Business Media ISBN: 1489915826 Category : Science Languages : en Pages : 347
Book Description
In this well-illustrated reference, contributors summarize current research on sulfate-reducing bacteria and examine their relationship to biotechnology processes. This approach enables researchers to identify and define appropriate questions for future research. Chapters examine the biochemical and physiological characteristics of sulfate-reducing eubacteria and archaebacteria and review environmental and industrial activities of these bacteria. This volume features the first review on bioremediation by sulfate-reducing bacteria.
Author: Cody Jay Allen
Author: Cody Jay Allen
Author: MB. McNeil
Author: An Hu
Author: CR. Clayton
Author: Jie' Wen
Author: Robert Raymond Sharp (III)
Author: Vaibhav Handa
Author: Lichong Xu
Author: 
Author: Larry L. Barton