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Articles de revues sur le sujet « Sulfide »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Schovan, Samantha, Grant McEachern, Alexandria Seeger, et al. "Remediation of Sulfides in Produced Waters of the Oil and Gas Industry Using Hydrogen Peroxide." Water 16, no. 14 (2024): 1987. http://dx.doi.org/10.3390/w16141987.

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Produced waters are often treated in open lagoons where hydrogen sulfide (H2S) can off gas, posing a risk to human health and the environment. The aim of this study was to optimize a treatment process using hydrogen peroxide (H2O2) to oxidize H2S while minimizing off gassing. Samples of produced water from West Texas and laboratory-prepared waters utilizing sodium sulfide (Na2S) or biogenic polysulfides were oxidized with H2O2 alone or in combination with copper or iron catalysts, sodium hydroxide (NaOH), or a commercial sulfide oxidizer, HydroPower Green™. Sulfur speciation was measured using

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Dalhem, Krister, Stefan Mattbäck, Anton Boman, and Peter Österholm. "A simplified distillation-based sulfur speciation method for sulfidic soil materials." Bulletin of the Geological Society of Finland 93, no. 1 (2021): 19–30. http://dx.doi.org/10.17741/bgsf/93.1.002.

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Speciation of inorganic sulfur species, mainly pyrite and metastable iron sulfides by operationally defined methods, is widely used for risk assessment of acid sulfate soils by quantifying the acidity producing elements, as well as for general characterisation of marine sediments and subaqueous soils. “Traditional” sulfur speciation methods commonly use highly specialised glassware which can be cumbersome for the operator, or, require long reaction times which limit the usability of the method. We present a simplified method which has a sufficiently low limit of detection (0.002%) and quantita

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Halkjær Nielsen, Per. "Sulfur Sources for Hydrogen Sulfide Production in Biofilms from Sewer Systems." Water Science and Technology 23, no. 7-9 (1991): 1265–74. http://dx.doi.org/10.2166/wst.1991.0578.

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The relative significance of different inorganic and organic sulfur compounds on the sulfide production in anaerobic biofilms grown on domestic wastewater was investigated. The objective was to improve the understanding of microbial processes in dynamic systems and to evaluate the equations used to predict sulfide formation in pressure mains. Biofilms originally grown on domestic wastewater with sulfate as the only electron acceptor were also able to reduce sulfite and thiosulfate. The bacteria preferred thiosulfate to sulfate if both were present and the sulfide production rates increased wit

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Ma, Hong He, Shu Zhong Wang, and Lu Zhou. "Sulfur Transformations during Supercritical Water Oxidation of Methanthiol and Thiirane." Advanced Materials Research 610-613 (December 2012): 1377–80. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.1377.

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The oxidation of methanthiol and thiirane in supercritical water was explored by using a tubular-flow reactor system using oxygen as oxidant. No sulfur containing species existed in the gaseous effluent. Sulfide, sulfite and sulfate were detected as the sulfur containing species in the liquid effluent for supercritical water oxidation (SCWO) of methannthiol, while it was determined as thiosulfate, sulfite and sulfate for SCWO of thiirane. When reaction temperature exceeded 873K, the sulfur contained in the methanthiol or thiirane all transformed into the liquid products. Oxidant stoichiometric

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Ma, Hong He, Shu Zhong Wang, and Lu Zhou. "Kinetics Behavior and Sulfur Transformations of Iron Sulfide during Supercritical Water Oxiation." Advanced Materials Research 524-527 (May 2012): 1939–42. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1939.

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Oxidation of iron sulfide in supercritical water was investigated in the batch reactor. Iron sulfide was converted in two parallel processes: gasification by water and oxidation by oxygen. Assuming that the reaction order of H2O was 0, the activation energy and pre-exponential factor of the gasification process were determined to be 43kJ mol-1 and 22.4 min-1, correspondingly. It is found that above 773K the oxidation process was limited by the mass transfer of O2 to particles surface. Below 773K, with an assumption of zero order in H2O concentration and first-order reaction in oxygen concentra

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Lestari, Eni, Dedy Darnaedi, and Safendrri Komara Ragamustari. "ISOLASI DAN IDENTIFIKASI BAKTERI PENGURAI SULFIDA DARI LUMPUR MANGROVE HUTAN LINDUNG ANGKE KAPUK." Borneo Journal of Biology Education (BJBE) 4, no. 1 (2022): 1–7. http://dx.doi.org/10.35334/bjbe.v4i1.2533.

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AbstrakMangrove memiliki mikroorganisme salah satunya bakteri. Lumpur mangrove memiliki kandungan hidrogen sulfida. Bakteri aerobik memetabolisme hidrogen sulfida ini menjadi senyawa sulfat. Isolasi menggunakan medium Thiosulfat Mineral Medium. Isolat yang diamati secara makroskopis. Isolat dipilih dari hasil pengamatan mikroskopik, uji katalase dan uji motilitas. Isolat diuji juga kinerja penurunan sulfida. Isolat dengan kinerja penurunan sulfida terbaik dilanjutkan untuk uji sekuensing 16S rRNA. Hasil sekuensing menunjukkan isolat dari lumpur mangrove yang memiliki kinerja penurunan sulfida

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Wang, Clifford L., Priya D. Maratukulam, Amy M. Lum, Douglas S. Clark, and J. D. Keasling. "Metabolic Engineering of an Aerobic Sulfate Reduction Pathway and Its Application to Precipitation of Cadmium on the Cell Surface." Applied and Environmental Microbiology 66, no. 10 (2000): 4497–502. http://dx.doi.org/10.1128/aem.66.10.4497-4502.2000.

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ABSTRACT The conversion of sulfate to an excess of free sulfide requires stringent reductive conditions. Dissimilatory sulfate reduction is used in nature by sulfate-reducing bacteria for respiration and results in the conversion of sulfate to sulfide. However, this dissimilatory sulfate reduction pathway is inhibited by oxygen and is thus limited to anaerobic environments. As an alternative, we have metabolically engineered a novel aerobic sulfate reduction pathway for the secretion of sulfides. The assimilatory sulfate reduction pathway was redirected to overproduce cysteine, and excess cyst

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8

Pellerin, André, Gilad Antler, Simon Agner Holm, et al. "Large sulfur isotope fractionation by bacterial sulfide oxidation." Science Advances 5, no. 7 (2019): eaaw1480. http://dx.doi.org/10.1126/sciadv.aaw1480.

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A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (34S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large 34S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in 34S

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Vysotskiy, Sergey V., Tatyana A. Velivetskaya, Aleksandr V. Ignatiev, and Anna V. Aseeva. "Atmosphere and biological impact during sulfide formation in the Archean Central-Vozhma sulfide deposit (Karelia)." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 7 (2024): 111–20. http://dx.doi.org/10.18799/24131830/2024/7/4388.

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Relevance. The need of new knowledge about the early stages of the Earth. Sulfur isotope analysis of sulfide minerals is a powerful tool to understand the processes during the Archaean and Paleoproterozoic. Combined with other data, isotope geochemistry provides an insight into sulfur sources of sulfides from ancient sulfide volcanosedimentary deposits; geochemical factors affecting Archaean sulfide volcanosedimentary ore formation; adjust genetic models and determine the degree of influence of bacteria on the mineral formation. Aim. To identify the sources of sulfur during the formation of su

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Jayaranjan, Madawala Liyanage Duminda, and Ajit P. Annachhatre. "Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum." Water Science and Technology 67, no. 2 (2013): 311–18. http://dx.doi.org/10.2166/wst.2012.546.

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Investigations were undertaken to utilize flue gas desulfurization (FGD) gypsum for the treatment of leachate from the coal ash (CA) dump sites. Bench-scale investigations consisted of three main steps namely hydrogen sulfide (H2S) production by sulfate reducing bacteria (SRB) using sulfate from solubilized FGD gypsum as the electron acceptor, followed by leaching of heavy metals (HMs) from coal bottom ash (CBA) and subsequent precipitation of HMs using biologically produced sulfide. Leaching tests of CBA carried out at acidic pH revealed the existence of several HMs such as Cd, Cr, Hg, Pb, Mn

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Borzenko, Svetlana. "Geochemical transformations of sulfur in salt lakes (Transbaikalia)." E3S Web of Conferences 411 (2023): 02009. http://dx.doi.org/10.1051/e3sconf/202341102009.

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The water column in brackish and saline lakes hosts various forms of sulfur including sulfide (hydrosulfide), elemental, thiosulfate, and sulfate sulfur. The unequal distribution of these reduced sulfur species indicates the presence of two opposing processes - sulfate reduction and oxidation of newly formed hydrogen sulfide. The scale of these processes varies among lakes, resulting in differing proportions of reduced sulfur forms. The bacterial reduction of sulfate ions is confirmed by a significant separation of sulfur isotopes into sulfide and sulfate ions, with the lighter isotope accumul

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Lamontagne, S., W. S. Hicks, R. W. Fitzpatrick, and S. Rogers. "Sulfidic materials in dryland river wetlands." Marine and Freshwater Research 57, no. 8 (2006): 775. http://dx.doi.org/10.1071/mf06057.

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Due to a combination of river regulation, dryland salinity and irrigation return, lower River Murray floodplains (Australia) and associated wetlands are undergoing salinisation. It was hypothesised that salinisation would provide suitable conditions for the accumulation of sulfidic materials (soils and sediments enriched in sulfides, such as pyrite) in these wetlands. A survey of nine floodplain wetlands representing a salinity gradient from fresh to hypersaline determined that surface sediment sulfide concentrations varied from <0.05% to ~1%. Saline and permanently flooded wetlands tended

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Wilkin, Richard T., and David A. Rogers. "Nickel sulfide formation at low temperature: initial precipitates, solubility and transformation products." Environmental Chemistry 7, no. 6 (2010): 514. http://dx.doi.org/10.1071/en10076.

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Environmental context Remediation technologies often rely on manipulation of redox conditions or natural redox processes to favour microbial sulfate-reduction and mineral sulfide formation for treatment of inorganic contaminants in groundwater, including nickel. However, few data are available on the structural properties, solubility and mineral transformation processes involving nickel sulfides. These data are needed in order to constrain the long term performance of groundwater remediation efforts. Abstract The formation of nickel sulfides has been examined experimentally over the temperatur

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Thériault, Robert D., Sarah-Jane Barnes, and Mark J. Severson. "The influence of country-rock assimilation and silicate to sulfide ratios (R factor) on the genesis of the Dunka Road Cu – Ni – platinum-group element deposit, Duluth Complex, Minnesota." Canadian Journal of Earth Sciences 34, no. 4 (1997): 375–89. http://dx.doi.org/10.1139/e17-033.

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The Dunka Road deposit is one of several Cu – Ni – platinum-group element (PGE) sulfide occurrences found along the northwestern margin of the Duluth Complex, where the host troctolitic rocks are in contact with metasedimentary rocks of the Animikie Group. Magma contamination through assimilation of sulfidic argillaceous country rocks is generally recognized as having played a key role in the genesis of the mineralization. Three main types of disseminated sulfide mineralization have been identified within the Dunka Road deposit: (i) norite-hosted sulfides, (ii) troctolite-hosted sulfides, and

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Kurmangalieva, Anna I., Lyubov' A. Anikanova, Ol'ga V. Volkova, Alexandr I. Kudyakov, Yurij S. Sarkisov, and Yurij A. Abzaev. "ACTIVATION OF HARDENING PROCESSES OF FLUOROGYPSUM COMPOSITIONS BY CHEMICAL ADDITIVES OF SODIUM SALTS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 8 (2020): 73–80. http://dx.doi.org/10.6060/ivkkt.20206308.6137.

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The article is devoted to modifications of fluorogypsum compositions by chemical additives of sodium salts in the form of sulfate, sulfite and sodium sulfide, as well as their combined effect on the kinetics of structure formation processes. Technological, ecological and technical aspects of utilization of fluorogypsum compositions activated by additives were investigated. Experiments have shown that an up to 3% increase in the amount of sodium sulfite additive leads to an increase in the compressive strength of samples at early stages of hardening (up to 14 days), whereas utilization of sodiu

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Beschkov, Venko N., Elena N. Razkazova-Velkova, Martin S. Martinov, and Stefan M. Stefanov. "Performance of Sulfide-Driven Fuel Cell Aerated by Venturi Tube Ejector." Catalysts 11, no. 6 (2021): 694. http://dx.doi.org/10.3390/catal11060694.

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Hydrogen sulfide is frequently met in natural waters, like mineral springs, but mostly it is found in marine water with low renewal rate. The Black Sea has extremely high hydrogen sulfide content. It can be utilized in different ways, but the most promising one is direct conversion into electricity. This result can be attained by a sulfide-driven fuel cell (SDFC), converting sulfide to sulfate thus releasing electric energy up to 24 GJ/t. One of the most important problems is the mass transfer limitation on oxygen transfer in the cathode space of the fuel cell. This problem can be solved using

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Miura, Yasuyuki, Yusuke Matsushita, and Paul R. Haddad. "Stabilization of sulfide and sulfite and ion-pair chromatography of mixtures of sulfide, sulfite, sulfate and thiosulfate." Journal of Chromatography A 1085, no. 1 (2005): 47–53. http://dx.doi.org/10.1016/j.chroma.2005.02.010.

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Rohwerder, Thore, and Wolfgang Sand. "The sulfane sulfur of persulfides is the actual substrate of the sulfur-oxidizing enzymes from Acidithiobacillus and Acidiphilium spp." Microbiology 149, no. 7 (2003): 1699–710. http://dx.doi.org/10.1099/mic.0.26212-0.

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To identify the actual substrate of the glutathione-dependent sulfur dioxygenase (EC 1.13.11.18) elemental sulfur oxidation of the meso-acidophilic Acidithiobacillus thiooxidans strains DSM 504 and K6, Acidithiobacillus ferrooxidans strain R1 and Acidiphilium acidophilum DSM 700 was analysed. Extraordinarily high specific sulfur dioxygenase activities up to 460 nmol min−1 (mg protein)−1 were found in crude extracts. All cell-free systems oxidized elemental sulfur only via glutathione persulfide (GSSH), a non-enzymic reaction product from glutathione (GSH) and elemental sulfur. Thus, GSH plays

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Berg, Jasmine S., Anne Schwedt, Anne-Christin Kreutzmann, Marcel M. M. Kuypers, and Jana Milucka. "Polysulfides as Intermediates in the Oxidation of Sulfide to Sulfate by Beggiatoa spp." Applied and Environmental Microbiology 80, no. 2 (2013): 629–36. http://dx.doi.org/10.1128/aem.02852-13.

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ABSTRACTZero-valent sulfur is a key intermediate in the microbial oxidation of sulfide to sulfate. Many sulfide-oxidizing bacteria produce and store large amounts of sulfur intra- or extracellularly. It is still not understood how the stored sulfur is metabolized, as the most stable form of S0under standard biological conditions, orthorhombic α-sulfur, is most likely inaccessible to bacterial enzymes. Here we analyzed the speciation of sulfur in single cells of living sulfide-oxidizing bacteria via Raman spectroscopy. Our results showed that under various ecological and physiological condition

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Straub, Kristina L., and Bernhard Schink. "Ferrihydrite-Dependent Growth of Sulfurospirillum deleyianum through Electron Transfer via Sulfur Cycling." Applied and Environmental Microbiology 70, no. 10 (2004): 5744–49. http://dx.doi.org/10.1128/aem.70.10.5744-5749.2004.

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ABSTRACT Observations in enrichment cultures of ferric iron-reducing bacteria indicated that ferrihydrite was reduced to ferrous iron minerals via sulfur cycling with sulfide as the reductant. Ferric iron reduction via sulfur cycling was investigated in more detail with Sulfurospirillum deleyianum, which can utilize sulfur or thiosulfate as an electron acceptor. In the presence of cysteine (0.5 or 2 mM) as the sole sulfur source, no (microbial) reduction of ferrihydrite or ferric citrate was observed, indicating that S. deleyianum is unable to use ferric iron as an immediate electron acceptor.

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Kushkevych, Ivan V. "Molecular Cloning cysK Gene from Escherichia coli Genome, Transferring in the Intestinal Sulfate-Reducing Bacteria and the Expression Analysis of O-acetylserine(thiol)lyase." Microbes and Health 4, no. 1 (2016): 19–24. http://dx.doi.org/10.3329/mh.v4i1.23089.

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Sulfate-reducing bacteria produce hydrogen sulfide which is toxic and carcinogenic for intestinal epithelial cells and can cause the development of the inflammatory bowel disease and ulcerative colitis in the humans and animals. Enzyme O-acetylserine(thiol)lyase, localized in Escherichia coli genome, use sulfide as substrate in the cysteine synthesis pathway. In this paper, the molecular cloning cysK gene from E. coli, its genetic transferring in the intestinal sulfate-reducing bacterium Desulfovibrio piger Vib-7 and the expression analysis of the enzyme was studied. Cysteine synthesis from hy

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Beschkov, Venko, Elena Razkazova-Velkova, Martin Martinov, and Stefan Stefanov. "Electricity Production from Marine Water by Sulfide-Driven Fuel Cell." Applied Sciences 8, no. 10 (2018): 1926. http://dx.doi.org/10.3390/app8101926.

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While there is a universal trend to replace fossil fuels at least partially, renewable fuels seem to impose new solutions. Hydrogen sulfide, typical for closed water ponds such as the Black Sea, seems to offer one namely, a new sulfide-driven fuel cell providing for exchange of OH− anions across the membrane by use of hydrogen sulfide in natural marine water. When tested in batch and continuous operation modes, this solution showed that the initial sulfide concentration needed to achieve results of practical value was within 200 to 300 mg dm−3. The predominating final products of the energy pr

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Jones, Alison M., and Roger Knowles. "Sulfide alleviation of acetylene inhibition of nitrous oxide reduction by Flexibacter Canadensis." Canadian Journal of Microbiology 38, no. 2 (1992): 143–48. http://dx.doi.org/10.1139/m92-023.

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The role of sulfide in the relief of acetylene inhibition of nitrous oxide reduction by Flexibacter canadensis was studied. In this organism, the reversal of acetylene inhibition of nitrous oxide reduction is correlated with a 90% decrease in the dissolved sulfide concentration. The fate of this sulfide is not known, since there was no concomitant increase in acid-soluble sulfide and volatile sulfur compounds were not detectable by flame photometric gas chromatography. Of the other sulfur-containing compounds tested (sulfate, sulfite, thiosulfate, cysteine, methionine, dithionite, dithionate,

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Zhang, Ya Hui, Xi Cheng, and Qing Wang. "A Low Temperature Precursor Sulfuration Route to Metal Sulfides Nanomaterials." Advanced Materials Research 148-149 (October 2010): 1404–7. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1404.

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A low-temperature precursor sulfuration route has been established to prepare metal sulfides with different nanostructures during the synthesis of nickel sulfide. The advantages of the low-temperature precursor sulfuration route were testified by the synthesis of different metal sulfides ( lead sulfide, zinc sulfide and cobalt sulfide). It offers a novel path to the preparation of other metal sulfides.

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Lin, Vivian S., Wei Chen, Ming Xian, and Christopher J. Chang. "Chemical probes for molecular imaging and detection of hydrogen sulfide and reactive sulfur species in biological systems." Chemical Society Reviews 44, no. 14 (2015): 4596–618. http://dx.doi.org/10.1039/c4cs00298a.

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This review highlights progress in the development of molecular probes for live cell imaging of hydrogen sulfide and other reactive sulfur species, including sulfite, bisulfite, sulfane sulfur species, and S-nitrosothiols.

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Marion, G. M., J. S. Kargel, J. K. Crowley, and D. C. Catling. "Sulfite–sulfide–sulfate–carbonate equilibria with applications to Mars." Icarus 225, no. 1 (2013): 342–51. http://dx.doi.org/10.1016/j.icarus.2013.02.035.

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Quynh Hoa, Kieu Thi, Phung Minh Hieu, Vy Tuan Anh, et al. "Sulfate/sulfide removal from wastewater by lab-scale microbial fuel cell." Vietnam Journal of Biotechnology 19, no. 4 (2022): 779–84. http://dx.doi.org/10.15625/1811-4989/17110.

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Sulfate/sulfide-containing wastewater is a widespread environmental contaminant resulting from human activities. These pollutants have negative impact on natural ecosystems and human beings. Biological sulfate/sulfide removal can be achieved by reducing sulfate to sulfide with sulfate-reducing bacteria and then oxidizing sulfide to elemental sulfur (So) with sulfide oxidizing bacteria. In sulfate/sulfide contaminant wastewater lacking electron acceptor for sulfide oxidization, excess sulfide will be produced and accumulated in the treatment system. Therefore, microbial fuel cells (MFCs) have b

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Andronikov, Alexandre V., Irina E. Andronikova, and Tamara Sidorinova. "Trace-Element Geochemistry of Sulfides in Upper Mantle Lherzolite Xenoliths from East Antarctica." Minerals 11, no. 7 (2021): 773. http://dx.doi.org/10.3390/min11070773.

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Sulfides in upper mantle lherzolite xenoliths from Cretaceous alkaline-ultramafic rocks in the Jetty Peninsula (East Antarctica) were studied for their major and trace-element compositions using SEM and LA-ICP-MS applied in situ. Modal abundance of sulfides is the lowest in Cpx-poor lherzolites ≤ Spl-Grt lherzolites << Cpx-rich lherzolites. Most sulfides are either interstitial (i-type) or inclusions in rock-forming minerals (e-type) with minor sulfide phases mostly present in metasomatic veinlets and carbonate-silicate interstitial patches (m-type). The main sulfide assemblage is pentla

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Sethurajan, Manivannan, and Eric D. van Hullebusch. "Leaching and Selective Recovery of Cu from Printed Circuit Boards." Metals 9, no. 10 (2019): 1034. http://dx.doi.org/10.3390/met9101034.

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Printed circuit boards (PCBs), a typical end-of-life electronic waste, were collected from an E-waste recycling company located in the Netherlands. Cu and precious metal concentration analyses of the powdered PCBs confirm that the PCBs are multimetallic in nature, rich, but contain high concentrations of Cu, Au, Ag, Pd, and Pt. Ferric sulfate concentration (100 mM), agitation speed (300 rpm), temperature (20 °C), and solid-to-liquid ratio (10 g·L−1) were found to be the optimum conditions for the maximum leaching of Cu from PCBs. The ferric sulfate leachates were further examined for selective

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Al-Tamir, Mus’ab A., Abdulah I. Al-Haialy, and Laith A. Al-Anaz. "Sulfide Removal From The Sulfide Spring." Tikrit Journal of Engineering Sciences 14, no. 2 (2007): 80–96. http://dx.doi.org/10.25130/tjes.14.2.08.

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In this study ferrous sulfate had been used as an oxidant for removing the sulfide from water samples taken from sulfide spring in Hamam al-alil south of the Mosul city. The study revealed that ferrous sulfate is efficient in removing sulfide in dose not to exceed to 200mg/l with an efficiency of 77%, also adding of Bentonite clay with ferrous sulfate in a dose of 150mg/l and eliminate the black color due to addition of ferrous sulfate, However; Bentonite clay is inefficient in removing sulfide from the water with dose more than 300mg/l, also the study revealed that the use of Bentonite clay a

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Saputra, Beny, Agus Sutanto, Mia Cholvistaria, Suprayitno Suprayitno, and Nala Rahmawati. "IDENTIFIKASI BAKTERI PEREDUKSI SULFAT PADA KAWAH AIR PANAS NIRWANA SUOH LAMPUNG BARAT." BIOLOVA 2, no. 2 (2021): 122–27. http://dx.doi.org/10.24127/biolova.v2i2.1089.

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Abstrak: Bakteri pereduksi sulfat atau Sulfate-reducing bacteria (SRB) adalah jenis bakteri obligat anaerob kemolitrotof memanfaatkan donor electron H2. Kemampuan SRB mereduksi sulfat menjadi sulfida mampu mengendapkan logam toksik meliputi Cd, Cu, dan Zn sebagai logam sulfida. SRB memerlukan substrat organik seperti asam piruvat yang dihasilkan oleh aktivitas anaerob lainnya. Mekanisme SRB dalam melakukan reduksi sulfat, sulfat digunakan sebagai sumber energi sebagai akseptor elektron dan menggunakan sumber karbon (C) sebagai donor elekton dalam metabolisme dan bahan penyusun sel. Pada kondis

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Mo, Shuming, Jinhui Li, Bin Li, et al. "L-Cysteine Synthase Enhanced Sulfide Biotransformation in Subtropical Marine Mangrove Sediments as Revealed by Metagenomics Analysis." Water 13, no. 21 (2021): 3053. http://dx.doi.org/10.3390/w13213053.

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High sulfides concentrations can be poisonous to environment because of anthropogenic waste production or natural occurrences. How to elucidate the biological transformation mechanisms of sulfide pollutants in the subtropical marine mangrove ecosystem has gained increased interest. Thus, in the present study, the sulfide biotransformation in subtropical mangroves ecosystem was accurately evaluated using metagenomic sequencing and quantitative polymerase chain reaction analysis. Most abundant genes were related to the organic sulfur transformation. Furthermore, an ecological model of sulfide co

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Gróf, Nikolas, Jana Barbušová, Kristína Hencelová, and Miroslav Hutňan. "Absorption removal of hydrogen sulfide from recirculated biogas." Acta Chimica Slovaca 13, no. 1 (2020): 13–18. http://dx.doi.org/10.2478/acs-2020-0003.

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AbstractThis study is focused on the effect of biogas recirculation with hydrogen sulfide removal on anaerobic treatment of sulfur-enriched synthetic wastewater in a UASB reactor. The presence of hydrogen sulfide in biogas causes problems in its further energy recovery while sulfides inhibit the anaerobic process. The reactor was gradually loaded with sulfates and their effect on the reactor operation was monitored. At the same time, external absorption of hydrogen sulfide from biogas with absorbent regeneration was operated. The results show that low concentrations of added sulfates support b

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Demidenko, I. V., and V. M. Ishimov. "Electrochemical Deposition of ZnS Films from Electrolyte Based on Na2SO3." Elektronnaya Obrabotka Materialov 57, no. 5 (2021): 20–26. http://dx.doi.org/10.52577/eom.2021.57.5.20.

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The paper considers the features of electrochemical growth of zinc sulfide from an aqueous electrolyte based on sodium sulfite and zinc sulfate. The conditions for the electrochemical production of ZnS films are determined. It is shown that the value of the potential at which a ZnS layer is formed is limited by the achievement of the critical current due to the diffusion limitations of the electrochemical process of reducing the sulfite ion. It is shown that the resulting films contain an excess of sulfur, which is removed, and the stoichiometric composition is obtained by heat treatment. Aed

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Nenkova, Sanchi, Peter Velev, Mirela Dragnevska, Diyana Nikolova, and Kiril Dimitrov. "Lignocellulose nanocomposite containing copper sulfide." BioResources 6, no. 3 (2011): 2356–65. http://dx.doi.org/10.15376/biores.6.3.2356-2365.

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Copper sulfide-containing lignocellulose nanocomposites with improved electroconductivity were obtained. Two methods for preparing the copper sulfide lignocellulose nanocomposites were developed. An optimization of the parameters for obtaining of the nanocomposites with respect to obtaining improved electroconductivity, economy, and lower quantities and concentration of copper and sulfur ions in waste waters was conducted. The mechanisms and schemes of delaying and subsequent connection of copper sulfides in the lignocellulosic matrix were investigated. The modification with a system of 2 comp

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Khanal, S. K., C. Shang, and J. C. Huang. "Use of ORP (oxidation-reduction potential) to control oxygen dosing for online sulfide oxidation in anaerobic treatment of high sulfate wastewater." Water Science and Technology 47, no. 12 (2003): 183–89. http://dx.doi.org/10.2166/wst.2003.0645.

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In this study, oxidation-reduction potential (ORP) was used as a controlling parameter to regulate oxygen dosing to the recycled biogas for online sulfide oxidation in an upflow anaerobic filter (UAF) system. The UAF was operated with a constant influent COD of 18,000 mg/L, but with different influent sulfates of 1000, 3000 and 6000 mg/L. The reactor was initially operated under a natural ORP of -290 mV (without oxygen injection), and was then followed by oxygenation to raise its ORP by 25 mV above the natural level for each influent sulfate condition. At 6,000 mg/L sulfate without oxygen inje

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Holmer, Marianne, William W. Bennett, Angus J. P. Ferguson, Jaimie Potts, Harald Hasler-Sheetal, and David T. Welsh. "Drivers of sulfide intrusion in Zostera muelleri in a moderately affected estuary in south-eastern Australia." Marine and Freshwater Research 68, no. 11 (2017): 2134. http://dx.doi.org/10.1071/mf16402.

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The seagrass Zostera muelleri Irmisch ex Asch. is abundant in estuaries in Australia and is under pressure from coastal developments. We studied sulfide intrusion in Z. muelleri along a gradient of anthropogenic impact at five stations in the Wallis Lake estuary, Australia. Results showed differences in sediment biogeochemical conditions, seagrass metrics as well as nutrient content and sulfide intrusion along the gradient from the lower estuary (affected) to the lagoon (unaffected). Sulfide intrusion was driven by complex interactions and related to changes in seagrass morphology and sediment

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Anderson, Melissa O., Mark D. Hannington, Timothy F. McConachy, et al. "Mineralization and Alteration of a Modern Seafloor Massive Sulfide Deposit Hosted in Mafic Volcaniclastic Rocks." Economic Geology 114, no. 5 (2019): 857–96. http://dx.doi.org/10.5382/econgeo.4666.

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Abstract Tinakula is the first seafloor massive sulfide deposit described in the Jean Charcot troughs and is the first such deposit described in the Solomon Islands—on land or the seabed. The deposit is hosted by mafic (basaltic-andesitic) volcaniclastic rocks within a series of cinder cones along a single eruptive fissure. Extensive mapping and sampling by remotely operated vehicle, together with shallow drilling, provide insights into deposit geology and especially hydrothermal processes operating in the shallow subsurface. On the seafloor, mostly inactive chimneys and mounds cover an area o

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Holkenbrink, Carina, Santiago Ocón Barbas, Anders Mellerup, Hiroyo Otaki, and Niels-Ulrik Frigaard. "Sulfur globule oxidation in green sulfur bacteria is dependent on the dissimilatory sulfite reductase system." Microbiology 157, no. 4 (2011): 1229–39. http://dx.doi.org/10.1099/mic.0.044669-0.

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Green sulfur bacteria (GSB) oxidize sulfide and thiosulfate to sulfate, with extracellular globules of elemental sulfur as an intermediate. Here we investigated which genes are involved in the formation and consumption of these sulfur globules in the green sulfur bacterium Chlorobaculum tepidum. We show that sulfur globule oxidation is strictly dependent on the dissimilatory sulfite reductase (DSR) system. Deletion of dsrM/CT2244 or dsrT/CT2245, or the two dsrCABL clusters (CT0851–CT0854, CT2247–2250), abolished sulfur globule oxidation and prevented formation of sulfate from sulfide, whereas

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Finster, Kai, Werner Liesack, and Bo Thamdrup. "Elemental Sulfur and Thiosulfate Disproportionation by Desulfocapsa sulfoexigens sp. nov., a New Anaerobic Bacterium Isolated from Marine Surface Sediment." Applied and Environmental Microbiology 64, no. 1 (1998): 119–25. http://dx.doi.org/10.1128/aem.64.1.119-125.1998.

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ABSTRACT A mesophilic, anaerobic, gram-negative bacterium, strain SB164P1, was enriched and isolated from oxidized marine surface sediment with elemental sulfur as the sole energy substrate in the presence of ferrihydrite. Elemental sulfur was disproportionated to hydrogen sulfide and sulfate. Growth was observed exclusively in the presence of a hydrogen sulfide scavenger, e.g., ferrihydrite. In the absence of a scavenger, sulfide and sulfate production were observed but no growth occurred. Strain SB164P1 grew also by disproportionation of thiosulfate and sulfite. With thiosulfate, the growth

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MURUGANANTHAN, M. "Removal of sulfide, sulfate and sulfite ions by electro coagulation." Journal of Hazardous Materials 109, no. 1-3 (2004): 37–44. http://dx.doi.org/10.1016/j.jhazmat.2003.12.009.

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Agarbati, Alice, Laura Canonico, Francesca Comitini, and Maurizio Ciani. "Reduction of Sulfur Compounds through Genetic Improvement of Native Saccharomyces cerevisiae Useful for Organic and Sulfite-Free Wine." Foods 9, no. 5 (2020): 658. http://dx.doi.org/10.3390/foods9050658.

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Sulfites and sulfides are produced by yeasts in different amounts depending on different factors, including growth medium and specific strain variability. In natural must, some strains can produce an excess of sulfur compounds that confer unpleasant smells, inhibit malolactic fermentation and lead to health concerns for consumers. In organic wines and in sulfite-free wines the necessity to limit or avoid the presence of sulfide and sulfite requires the use of selected yeast strains that are low producers of sulfur compounds, with good fermentative and aromatic aptitudes. In the present study,

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Findlay, Alyssa J., Valeria Boyko, André Pellerin, et al. "Sulfide oxidation affects the preservation of sulfur isotope signals." Geology 47, no. 8 (2019): 739–43. http://dx.doi.org/10.1130/g46153.1.

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Abstract The accumulation of oxygen in Earth’s atmosphere and oceans in the late Archean had profound implications for the planet’s biogeochemical evolution. Oxygen impacts sulfur cycling through the oxidation of sulfide minerals and the production of sulfate for microbial sulfate reduction (MSR). The isotopic signature of sulfur species preserved in the geologic record is affected by the prevailing biological and chemical processes and can therefore be used to constrain past oxygen and sulfate concentrations. Here, in a study of a late Archean analogue, we find that the sulfur isotopic signat

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Wulansari, Isma. "Sulfiden Removal by Catalitic Oxidation From Rayon Waste." Devotion Journal of Community Service 4, no. 2 (2023): 615–23. http://dx.doi.org/10.36418/devotion.v4i2.414.

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Catalytic oxidation of spent sulfidic caustic consist of SH- ion or NaHS compound by H 2 O2 in neutral or acidic solution to elemental sulphur may provide a convenient and economical method for the control of sulphide wastes and their associated odors at pulp, paper and textile industry. Oxidation of sulfide in rayon waste by hydrogen peroxide was investigated in the presence of ferric sulfate catalyst. Kinetic equations and activation energies of H 2 O2 and SH- ion to total sulphur and sulphate in rayon waste for catalytic oxidation reaction were calculated based on the experimental results.

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Jackson, Bradley E., and Michael J. McInerney. "Thiosulfate Disproportionation byDesulfotomaculum thermobenzoicum." Applied and Environmental Microbiology 66, no. 8 (2000): 3650–53. http://dx.doi.org/10.1128/aem.66.8.3650-3653.2000.

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ABSTRACT Desulfotomaculum thermobenzoicum, but notDesulfotomaculum nigrificans, Desulfotomaculum ruminis, or Desulfosporosinus orientis, grew by disproportionation of thiosulfate, forming stoichiometric amounts of sulfate and sulfide; sulfite was not disproportionated. The addition of acetate enhanced growth and thiosulfate disproportionation by D. thermobenzoicum compared to those observed with thiosulfate alone.

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Jeans, Christopher V., Alexandra V. Turchyn, and Xu-Fang Hu. "Sulfur isotope patterns of iron sulfide and barite nodules in the Upper Cretaceous Chalk of England and their regional significance in the origin of coloured chalks." Acta Geologica Polonica 66, no. 2 (2016): 227–56. http://dx.doi.org/10.1515/agp-2016-0010.

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AbstractThe relationship between the development of iron sulfide and barite nodules in the Cenomanian Chalk of England and the presence of a red hematitic pigment has been investigated using sulfur isotopes. In southern England where red and pink chalks are absent, iron sulfide nodules are widespread. Two typical large iron sulfide nodules exhibit δ34S ranging from −48.6‰ at their core to −32.6‰ at their outer margins. In eastern England, where red and pink chalks occur in three main bands, there is an antipathetic relationship between the coloured chalks and the occurrence of iron sulfide or

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Rajan, A. Sundar, Yeshvi Tomar, Ahamed Irshad Maniyanganam, Debanjan Mitra, Sri Narayan, and G. K. Surya Prakash. "Beneficial Impact of Selenate/Selenide Additives on the Performance and Longevity of the Iron Electrode for Alkaline Batteries." ECS Meeting Abstracts MA2024-02, no. 67 (2024): 4537. https://doi.org/10.1149/ma2024-02674537mtgabs.

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The alkaline iron electrode stands out as a cost-effective and robust negative electrode option, particularly suited for large-scale energy storage applications. During discharge, iron undergoes oxidation transforming into iron dihydroxide (Fe(OH)2). Iron dihydroxide is insulating in nature which inhibits electrode discharge. The iron sulfide (FeS) is introduced as an additive to the iron electrode which serves to establish a conductive matrix, facilitating electrode discharge. However, the longevity of iron electrodes is constrained by the iron sulfide (FeS) additive. Through repeated cycles

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Vysotskiy, Sergey V., Tatyana A. Velivetskaya, Aleksandr V. Ignatiev, Aleksandr I. Slabunov, and Anna V. Aseeva. "Multiple Sulfur Isotope Evidence for Bacterial Sulfate Reduction and Sulfate Disproportionation Operated in Mesoarchaean Rocks of the Karelian Craton." Minerals 12, no. 9 (2022): 1143. http://dx.doi.org/10.3390/min12091143.

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Sulfur isotope in sulfides from the Paleoarchean and the Neoarchean sedimentary rocks evidence microbial sulfur metabolism in Archean sulfur cycle. However, sulfur metabolism for the Mesoarchean interval is less obvious since evidence for a large range in sulfur isotope values has not yet been observed in Mesoarchean samples. We report the results of multiple sulfur isotope measurements for sulfide minerals from ~2.8 Ga sedimentary rocks in the southeastern part of the Karelian Craton. In situ isotope analysis of sulfide grains have been performed using a femtosecond laser-ablation fluorinatio

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Kertesz, Michael A., Karen Schmidt-Larbig, and Thomas Wüest. "A Novel Reduced Flavin Mononucleotide-Dependent Methanesulfonate Sulfonatase Encoded by the Sulfur-Regulatedmsu Operon of Pseudomonas aeruginosa." Journal of Bacteriology 181, no. 5 (1999): 1464–73. http://dx.doi.org/10.1128/jb.181.5.1464-1473.1999.

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ABSTRACT When Pseudomonas aeruginosa is grown with organosulfur compounds as sulfur sources, it synthesizes a set of proteins whose synthesis is repressed in the presence of sulfate, cysteine, or thiocyanate (so-called sulfate starvation-induced proteins). The gene encoding one of these proteins, PA13, was isolated from a cosmid library of P. aeruginosa PAO1 and sequenced. It encoded a 381-amino-acid protein that was related to several reduced flavin mononucleotide (FMNH2)-dependent monooxygenases, and it was the second in an operon of three genes, which we have namedmsuEDC. The MsuD protein c

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Bataleva, Yuliya, Yuri Palyanov, and Yuri Borzdov. "Sulfide Formation as a Result of Sulfate Subduction into Silicate Mantle (Experimental Modeling under High P,T-Parameters)." Minerals 8, no. 9 (2018): 373. http://dx.doi.org/10.3390/min8090373.

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Ca,Mg-sulfates are subduction-related sources of oxidized S-rich fluid under lithospheric mantle P,T-parameters. Experimental study, aimed at the modeling of scenarios of S-rich fluid generation as a result of desulfation and subsequent sulfide formation, was performed using a multi-anvil high-pressure apparatus. Experiments were carried out in the Fe,Ni-olivine–anhydrite–C and Fe,Ni-olivine–Mg-sulfate–C systems (P = 6.3 GPa, T of 1050 and 1450 °C, t = 23–60 h). At 1050 °C, the interaction in the olivine–anhydrite–C system leads to the formation of olivine + diopside + pyrrhotite assemblage an

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