scholarly journals Tetrathionate production by sulfur oxidizing bacteria and the role of tetrathionate in the sulfur cycle of Baltic Sea sediments

1999 ◽  
Vol 17 ◽  
pp. 255-265 ◽  
Author(s):  
L Podgorsek ◽  
JF Imhoff
Keyword(s):  
Baltic Sea ◽  
Sulfur Cycle ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

scholarly journals Organic Stabilization of Extracellular Elemental Sulfur in a Sulfurovum-Rich Biofilm: A New Role for Extracellular Polymeric Substances?

2021 ◽  
Vol 12 ◽  
Author(s):  
Brandi Cron ◽  
Jennifer L. Macalady ◽  
Julie Cosmidis
Keyword(s):  
Crystal Structures ◽  
Extracellular Polymeric Substances ◽  
Elemental Sulfur ◽  
Dense Matrix ◽  
Cave System ◽  
Carboxylic Groups ◽  
Sulfur Oxidizing ◽  
New Evidence ◽  
Sulfur Oxidizing Bacteria

This work shines light on the role of extracellular polymeric substance (EPS) in the formation and preservation of elemental sulfur biominerals produced by sulfur-oxidizing bacteria. We characterized elemental sulfur particles produced within a Sulfurovum-rich biofilm in the Frasassi Cave System (Italy). The particles adopt spherical and bipyramidal morphologies, and display both stable (α-S8) and metastable (β-S8) crystal structures. Elemental sulfur is embedded within a dense matrix of EPS, and the particles are surrounded by organic envelopes rich in amide and carboxylic groups. Organic encapsulation and the presence of metastable crystal structures are consistent with elemental sulfur organomineralization, i.e., the formation and stabilization of elemental sulfur in the presence of organics, a mechanism that has previously been observed in laboratory studies. This research provides new evidence for the important role of microbial EPS in mineral formation in the environment. We hypothesize that the extracellular organics are used by sulfur-oxidizing bacteria for the stabilization of elemental sulfur minerals outside of the cell wall as a store of chemical energy. The stabilization of energy sources (in the form of a solid electron acceptor) in biofilms is a potential new role for microbial EPS that requires further investigation.

scholarly journals Isolation of Sulfur Oxidizing Bacteria from Polluted Water and Screening for Their Efficiency of Sulfide Oxidase Production

2018 ◽  
Vol 21 (3) ◽  
pp. 259-264
Keyword(s):  
Biochemical Characterization ◽  
Critical Role ◽  
Sulfur Cycle ◽  
Polluted Water ◽  
Bacterial Isolates ◽  
Sulfate Ion ◽  
Promising Alternative ◽  
The Media ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

<p>Presence of sulfide in the environment represents huge concerns to biological life. The high costs and low safety of chemical and physical removal strategies lead to finding alternative strategies. Sulfur-oxidizing bacteria (SOB) are consider a promising alternative strategy, where they play a critical role in removal of such compounds from water and soil environments, as well as, they maintain the sulfur balance during natural sulfur cycle. The main objective of this study was to isolate sulfur oxidizing bacteria (SOB) from sulfide polluted water. In addition screening for sulfide oxidase producer bacteria was performed. Twenty isolates of sulfur oxidizing bacteria were isolated from eight different sulfide polluted water sources. During testing the isolates on thiosulfate broth medium, it was observed that, eleven isolates could efficiently reduce the pH of the media from 7.5±0.2 to 5.0 ± 0.5 as a resulting of the oxidizing of sulfides to sulfate ion. The concentration of produced sulfate ion ranged from 76 to 155 mg mL<sup>-1</sup>. The sulfur oxidase activity of the tested isolates ranged between 2.68 to 5.23 U mL<sup>-1</sup>. The bacterial isolates were identified as <em>Bacillus</em> spp., <em>Pseudomonas</em> spp. and <em>Klebsiella </em>spp. based on their morphological and biochemical characterization.</p>

scholarly journals Organic stabilization of extracellular elemental sulfur in a Sulfurovum-rich biofilm: a new role for EPS?

2021 ◽  
Author(s):  
Brandi Cron ◽  
Jennifer L. Macalady ◽  
Julie Cosmidis
Keyword(s):  
Crystal Structures ◽  
Extracellular Polymeric Substances ◽  
Elemental Sulfur ◽  
Dense Matrix ◽  
Cave System ◽  
Carboxylic Groups ◽  
Sulfur Oxidizing ◽  
New Evidence ◽  
Sulfur Oxidizing Bacteria

This work shines light on the role of extracellular polymeric substances (EPS) in the formation and preservation of elemental sulfur biominerals produced by sulfur-oxidizing bacteria. We characterized elemental sulfur minerals produced within a Sulfurovum-rich biofilm in the Frasassi Cave System (Italy). The particles adopt spherical and bipyramidal morphologies, and display both stable (α-S8) and metastable (β-S8) crystal structures. Elemental sulfur is embedded within a dense matrix of EPS and the particles possess organic envelopes rich in amide and carboxylic groups. Organic encapsulation and the presence of metastable crystal structures are consistent with elemental sulfur organomineralization, i.e. the formation and stabilization of elemental sulfur in the presence of organics, a mechanism that has previously been observed in laboratory studies. This research provides new evidence for the important role of microbial EPS in mineral formation in the environment. We hypothesize that extracellular organics are used by sulfur-oxidizing bacteria for the stabilization of elemental sulfur minerals outside of the cell wall as a store of chemical energy. The stabilization of energy sources (under the form of solid electron acceptors) in biofilms is a potential new role for microbial EPS that requires further investigation.

Effects of activated carbon on treatment of photo-processing waste by sulfur-oxidizing bacteria

1997 ◽  
Vol 35 (7) ◽  
pp. 187-195 ◽  
Author(s):  
Binle Lin ◽  
K. Futono ◽  
A. Yokoi ◽  
M. Hosomi ◽  
A. Murakami
Keyword(s):  
Activated Carbon ◽  
Treatment Effectiveness ◽  
Environmental Concern ◽  
Type Systems ◽  
Continuous Treatment ◽  
Processing Waste ◽  
Treatment Technology ◽  
Adsorption Effect ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

Establishing economic treatment technology for safe disposal of photo-processing waste (PW) has most recently become an urgent environmental concern. This paper describes a new biological treatment process for PW using sulfur-oxidizing bacteria (SOB) in conjunction with activated carbon (AC). Batch-type acclimation and adsorption experiments using SOB/PAC, SOB/PNAC, and SOB reactor type systems demonstrated that AC effectively adsorbs the toxic/refractory compounds which inhibit thiosulfate oxidization of SOB in PW. Thus, to further clarify the effect of AC, we performed a long-term (≈ 160 d) continuous-treatment experiment on 4- to 8-times dilution of PW using a SOB/GAC system which simulated a typical wastewater treatment system based on an aerobic activated sludge process that primarily uses acclimated SOB. The thiosulfate load and hydraulic retention time (HRT) were fixed during treatment such that they ranged from 0.8-3.7 kg S2O32-/l/d and 7.7-1.9 d, respectively. As expected, continuous treatment led to breakthrough of the adsorption effect of GAC. Renewing the GAC and continuing treatment for about 10 d demonstrated good treatment effectiveness.

UNDERSTANDING THE ROLE OF MICROBES IN THE FRESHWATER SEDIMENT CRYPTIC SULFUR CYCLE USING METAGENOMICS AND METATRANSCRIPTOMICS

2020 ◽  
Author(s):  
Emily Hyde ◽  
◽  
Cody Sheik ◽  
Sergei Katsev ◽  
Madelyn Petersen ◽  
...  
Keyword(s):  
Sulfur Cycle ◽  
Freshwater Sediment

scholarly journals Sulfur bacteria promote dissolution of authigenic carbonates at marine methane seeps

2021 ◽  
Author(s):  
Dalton J. Leprich ◽  
Beverly E. Flood ◽  
Peter R. Schroedl ◽  
Elizabeth Ricci ◽  
Jeffery J. Marlow ◽  
...  
Keyword(s):  
Carbonate Rocks ◽  
Sulfur Oxidation ◽  
Methane Seeps ◽  
Etch Pits ◽  
Active Dissolution ◽  
Authigenic Carbonates ◽  
Sulfur Bacteria ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

AbstractCarbonate rocks at marine methane seeps are commonly colonized by sulfur-oxidizing bacteria that co-occur with etch pits that suggest active dissolution. We show that sulfur-oxidizing bacteria are abundant on the surface of an exemplar seep carbonate collected from Del Mar East Methane Seep Field, USA. We then used bioreactors containing aragonite mineral coupons that simulate certain seep conditions to investigate plausible in situ rates of carbonate dissolution associated with sulfur-oxidizing bacteria. Bioreactors inoculated with a sulfur-oxidizing bacterial strain, Celeribacter baekdonensis LH4, growing on aragonite coupons induced dissolution rates in sulfidic, heterotrophic, and abiotic conditions of 1773.97 (±324.35), 152.81 (±123.27), and 272.99 (±249.96) μmol CaCO3 • cm−2 • yr−1, respectively. Steep gradients in pH were also measured within carbonate-attached biofilms using pH-sensitive fluorophores. Together, these results show that the production of acidic microenvironments in biofilms of sulfur-oxidizing bacteria are capable of dissolving carbonate rocks, even under well-buffered marine conditions. Our results support the hypothesis that authigenic carbonate rock dissolution driven by lithotrophic sulfur-oxidation constitutes a previously unknown carbon flux from the rock reservoir to the ocean and atmosphere.

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