scholarly journals Positive and negative aspects of suplhate-reducing bacteria in environment and industry

2021 ◽  
Vol 9 (2) ◽  
pp. 147-154
Author(s):  
Alena Luptakova ◽  
Eva Macingova ◽  
Vlasta Harbulakova
Keyword(s):  
Acid Mine Drainage ◽  
Hydrogen Sulphide ◽  
Bacterial Production ◽  
Mine Drainage ◽  
Sodium Lactate ◽  
Sulphate Reduction ◽  
Calcium Lactate ◽  
Sulphate Reducing Bacteria ◽  
Bacterial Sulphate Reduction ◽  
Reducing Bacteria

The submitted work is oriented on the study of two aspects of the sulphate-reducing bacteria metabolism: the metals bioprecipitation and the concrete biodeterioration. The bioprecipitation of metals with the bacterially produced hydrogen sulphide by sulphate-reducing bacteria (SRB) represents the positive effect of the SRB existence in the environment. It allows the industrial exploitation in the area of the removal metals from industrial wastewaters. Referred method involves principal stages such as: hydrogen sulphide bacterial production, metals precipitation by biologically produced hydrogen sulphide, metal sulphides separation, setting pH of the filtrate from previous steps by 1M NaOH and metal hydroxides separation. The basis of the first stage i.e. the hydrogen sulphide bacterial production is the cultivation of SRB. In the laboratory conditions the sodium lactate is the energetic substrate for the growth of bacteria. Its price is not economic for the application in the practice and is needed investigate the alternative substitutes. Therefore was studied the cultivation of sulphate-reducing bacteria to using the selected energetic substrates such as: calcium lactate, glycerol and whey. Experimental studies confirm that all chosen substrates are suitable alternative substrates of sodium lactate for the bacterial sulphate-reduction. In the regard to the efficiency of bacterial sulphate reduction the calcium lactate is the best. The biodeterioration of the concrete presents the negative effect of the SRB existence in the environment. The research was oriented on the simulation of the biodeterioration of concrete samples under the simultaneous influence of the sulphur-oxidising bacteria genera Acidithiobacillus thiooxidans and sulphatereducing bacteria genera Desulfovibrio in the environs of the waste water, the acid mine drainage, the nutrient medium and the distilled water. The observation of the surface structure changes of concrete samples confirms the highest biodeterioration influences in the case of the acid mine drainage application.

scholarly journals Anaerobic Bioreduction of Jarosites and Biofilm Formation by a Natural Microbial Consortium

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 81 ◽  
Author(s):  
Laura Castro ◽  
M. Blázquez ◽  
Felisa González ◽  
Jesús Muñoz ◽  
Antonio Ballester
Keyword(s):  
Acid Mine Drainage ◽  
Biofilm Formation ◽  
Mine Drainage ◽  
Microbial Consortium ◽  
Laser Scanning Microscopy ◽  
Anaerobic Microorganism ◽  
Sulphate Reducing Bacteria ◽  
Acid Mine ◽  
Obligate Anaerobic ◽  
Reducing Bacteria

Jarosite occurs naturally in acid sulphate soils and is a common feature of streams impacted by acid mine drainage (AMD). Biological reduction of iron-sulphate minerals, such as jarosite, has the potential to contribute to the natural attenuation of acid mine drainage sites. The reduction of different jarosites (including minerals containing precious and toxic metals) by a natural bacterial/microbial consortium was examined in this study. Jarosites was used as a sole terminal electron acceptor via the reductive dissolution of Fe(III) minerals. The production of Fe(II) and the presence of sulphate-reducing bacteria in the consortium lead to the precipitation of metal sulphides immobilizing toxic heavy metals. Microbial attachment and biofilm formation of minerals have a great impact on the production and transformation of minerals and can influence the mobility of metals. After the adaptation to different jarosites, a unique specie was found: Desulfosporosinus orientis. Desulfosporosinus species are sulphate-reducing bacteria and can be found in sulphate-rich heavy metal-polluted environments, such as acid mine/rock drainage sites, being responsible for the sulphides formation. D. orientis is an obligate anaerobic microorganism and is able to reduce Fe(III) D. orientis is an obligate anaerobic microorganism and is able to reduce Fe(III). Confocal laser scanning microscopy and fluorescent lectin-binding analyses (FLBA) were used to study the arrangement and composition of the exopolysaccharides/glycoconjugates in biofilms indicating the presence of mannose, glucose, and N-acetylglucosamine residues. This study provides insights to understand the processes leading to the mobility or retention of metals in mine waste and industrial landfill environments.

scholarly journals Bacterial Reduction Of Barium Sulphate By Sulphate-Reducing Bacteria

2015 ◽  
Vol 14 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Alena Luptáková ◽  
Ingrida Kotuličová ◽  
Magdaléna Bálintová ◽  
Štefan Demčák
Keyword(s):  
Heavy Metals ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Barium Chloride ◽  
Barium Sulphate ◽  
Low Ph ◽  
Bacterial Reduction ◽  
Sulphate Reducing Bacteria ◽  
High Investment ◽  
Reducing Bacteria

AbstractAcid mine drainage (AMD) is a worldwide problem leading to contamination of water sources. AMD are characterized by low pH and high content of heavy metals and sulphates. The barium salts application presents one of the methods for the sulphates removing from AMD. Barium chloride, barium hydroxide and barium sulphide are used for the sulphates precipitation in the form of barium sulphate. Because of high investment costs of barium salts, barium sulphide is recycled from barium sulphate precipitates. It can be recycled by thermic or bacterial reduction of barium sulphate. The aim of our study was to verify experimentally the possibility of the bacterial transformation of BaSO4to BaS by sulphate-reducing bacteria. Applied BaSO4came from experiments of sulphates removal from Smolnik AMD using BaCl2.

Low-temperature sulphate reduction: biological versus abiological

1985 ◽  
Vol 22 (12) ◽  
pp. 1910-1918 ◽  
Author(s):  
P. A. Trudinger ◽  
L. A. Chambers ◽  
J. W. Smith
Keyword(s):  
Organic Matter ◽  
Low Temperature ◽  
Base Metal ◽  
Ferrous Iron ◽  
Sulphate Reduction ◽  
Base Metal Sulphide ◽  
Metal Sulphide ◽  
Sulphate Reducing Bacteria ◽  
Bacterial Sulphate Reduction ◽  
Reducing Bacteria

Sulphate is considered to have been a major source of sulphide in strata-bound and stratiform base-metal sulphide deposits. Many of these deposits, however, appear to have been formed at moderate temperatures (<200 °C), which poses the question, By what mechanism(s) was sulphate reduced to sulphide? Two modes of reduction have been established experimentally: (1) catalysis by sulphate-reducing bacteria, which at present is only known to occur below ca. 100 °C; and (2) abiological reduction by ferrous iron or organic matter, which has only been clearly shown above ca. 250 °C.Several attempts have been made to demonstrate abiological reduction below 200 °C, and some new data are presented here. Although the results do not exclude the possibility that such a reaction may be geochemically significant, there has been no unequivocal demonstration of nett sulphide formation from sulphate at these temperatures.Recent studies of the microbiology of hydrothermal regions have opened up the prospect of bacterial sulphate reduction at much higher temperatures than had earlier been thought possible.

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