Characterisation of exopolymers produced by different isolates of marine sulphate-reducing bacteria

Zinkevich, Vitaly; Bogdarina, Irina; Kang, Hong-Yo; Hill, Martin; Tapper, R.; Beech, Iwona B.

doi:10.1016/s0964-8305(96)00025-x

Cited by 101 publications

(55 citation statements)

References 16 publications

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“…However, their applications are often affected by corrosion which necessitates the use of stainless steels. Apart from chemical corrosion, the steels may also be affected by microbial influenced corrosion (MIC) which is caused by microbial colonization of metal surfaces and formation of biofilms affecting the electrochemical nature of the metal-environment system [1,2]. * E-mail: ajaycorr@rediffmail.com Most microbial corrosion studies reported in literature are related to sulphate-reducing bacteria (SRBs), especially mesophilic type (Desulfovibrio) [3][4][5] due to their prevalence in various industrial media and their reputation as the principal causative organism responsible for localized corrosion on stainless steels causing unexpected failure [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Microbial influenced corrosion by thermophilic bacteria

2011

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The present study was undertaken to investigate microbial influenced corrosion (MIC) on stainless steels due to thermophilic bacteria Desulfotomaculum nigrificans. The objective of the study was to measure the extent of corrosion and correlate it with the growth of the biofilm by monitoring the composition of its extracellular polymeric substances (EPS). The toxic effect of heavy metals on MIC was also observed. For this purpose, stainless steels 304L, 316L and 2205 were subjected to electrochemical polarization and immersion tests in the modified Baar's media, control and inoculated, in anaerobic conditions at room temperature. Scanning electron microscopy (SEM)/ energy dispersive spectroscopy (EDS) were used to identify the chemicals present in/outside the pit. The results show maximum corrosive conditions when bacterial activity is highest, which in turn minimizes the amount of carbohydrate and protein along with the increase in the fraction of uronic acid in carbohydrate in EPS of the biofilm. However, although bacterial activity and corrosion rate decreases, the amount of biofilm components continue to increase. It is also observed that the toxicity of metals ions affect the bacterial activity and EPS production. It was observed that Desulfotomaculum sp. has the ability to biodegrade its own EPS.

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Section: Introductionmentioning

confidence: 99%

Microbial influenced corrosion by thermophilic bacteria

2011

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“…These include humic and fulvic acids arising from lignocellulose degradation and extracellular polymeric substances (EPS), a mixture of polysaccharides, mucopolysaccharides and proteins produced by bacteria, algae and fungi (Schreiber et al, 1990 ;Beech & Cheung, 1995 ;Spark et al, 1997). The composition of EPS produced by SRB has been shown to be modified by the presence of carbon steel, which may increase its metal-binding capacity (Zinkevich et al, 1996). In contrast, specific metal-binding compounds are produced directly in response to high levels of toxic metals.…”

Section: Introductionmentioning

confidence: 99%

“…This study was therefore undertaken to determine whether SRB produce extracellular, soluble metalbinding compounds in order to provide further understanding of metal metabolism in these organisms. Zinkevich et al, 1996). All the SRB used in this work used lactate as a carbon and energy source and were routinely cultured in SL10-lactate media at pH 7n0, in either 10 ml volumes in 12 ml Hach tubes (screw-top test tubes with an airtight seal) or 50 ml volumes in 60 ml Weaten vials.…”

Section: Introductionmentioning

confidence: 99%

Extracellular metal-binding activity of the sulphate-reducing bacterium Desulfococcus multivorans

1999

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Polarography was used to measure the copper-binding ability of culture filtrates from a range of sulphate-reducing bacteria (SRB), including pure cultures and environmental isolates. Of those tested, Desulfococcus multivorans was shown to have the greatest copper-binding capacity and this organism was used for further experiments. Extracellular copper-and zincbinding activities of Dc. multivorans culture filtrates from batch cultures increased over time and reached a maximum after 10 d growth. The culture filtrate was shown to bind copper reversibly and zinc irreversibly. Twelve-dayold Dc. multivorans culture filtrates were shown to have a copper-binding capacity of 364 O 033 µmol ml N1 with a stability constant, log 10 K, of 568 O 064 (nU4). The metal-binding compound was partially purified from culture growth media by dichloromethane extraction followed by HPLC using an acetonitrile gradient.

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“…De surcroît, les mécanismes de formation des biofilms connus dans le détail pour Pseudomonas aeruginosa (Govan et Deretic, 1996) (Zinkevich et al, 1996).…”

Section: Biofilms Et Exopolysaccharides Des Bsrunclassified

Rôle des bactéries sulfurogènes dans la corrosion du fer

Marchal

1999

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Cet article fait le point sur les connaissances concernant l'implication des bactéries sulfurogènes dans la corrosion des aciers au carbone. Après la description de quelques cas récents tirés de l'industrie pétrolière, la physiologie des bactéries sulfurogènes qui jouent le rôle principal dans le mécanisme de la corrosion anaérobie d'origine bactérienne est examinée. La participation des bactéries productrices d'H 2 S à la constitution de biofilms est une condition importante à la manifestation des phénomènes de corrosion. Les différentes hypothèses de mécanismes décrites par la littérature sont passées en revue. Indépendamment du rôle physicochimique joué par les sulfures de fer, non couvrants, bons conducteurs électriques, il en ressort que l'acidification résultant du métabolisme cellulaire est un facteur crucial, non seulement en termes d'électrochimie, mais également en termes de croissance microbienne. L'acidification métabolique explique vraisemblablement la fourniture des ions ferreux pour le micro-organisme dans un environnement chargé d'ions sulfures et finalement la persistance de son activité physiologique dans un microenvironnement riche en H 2 S.Mots-clés : bactéries sulfurogènes, bactéries sulfato-réductrices, bactéries thiosulfato-réductrices, biocorrosion, corrosion bacté-rienne, biofilms. Abstract -Involvment of Sulfidogenic Bacteria in Iron Corrosion -The involvement of sulfidogenic bacteria in the corrosion of carbon steel is reviewed. After a brief description of some recent cases drawn from the petroleum industry, the physiology of the sulfidogenic bacteria which plays the most important role in the mechanism of anaerobic bacterial corrosion is examined. The involvement of H 2 S-producing bacteria to the biofilm formation is

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Characterisation of exopolymers produced by different isolates of marine sulphate-reducing bacteria

Cited by 101 publications

References 16 publications

Microbial influenced corrosion by thermophilic bacteria

Microbial influenced corrosion by thermophilic bacteria

Extracellular metal-binding activity of the sulphate-reducing bacterium Desulfococcus multivorans

Rôle des bactéries sulfurogènes dans la corrosion du fer

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