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Showing 1 to 15 of 15 for “"elemental sulphur"”.
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Machine learning force fields for elemental sulphur
The sulphur phase diagram is one of the most complex ones of all elemental systems, competing with that of carbon. The flexibility of the bonds allows for a variety of motifs: rings of 5 or more atoms in various conformations, short diradical chains and thousands-atoms long polymers to name a few; …
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The effect of vanadium oxidation states on the conversion of hydrogen sulphide to elemental sulphur
… process during H₂S absorption and conversion to elemental sulphur. However, the effect of vanadium oxidation states (V⁴⁺ and V⁵⁺) on hydrogen sulphide ions (HS⁻) conversion to sulphur product and its quality has not been systematically studied hence the purpose of this study was to understand …
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A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor
… sulphide, followed by its partial oxidation to elemental sulphur, which is stable and has potential as a value-added product. A promising approach to achieve partial oxidation is the use of sulphide oxidising bacteria (SOB) in a floating sulphur biofilm (FSB). These biofilms develop naturally on …
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Optimisation of a linear flow channel reactor for semi-passive, simultaneous biological sulphate reduction and partial sulphide oxidation
… it from the stream in gaseous form or as a solid sulphur-containing compound. Alternatively, it can also be used, in part, to precipitate metals present within ARD waters. Key challenges associated with SRBbased bioremediation include the cost of the supplemented electron donor needed for SRB to …
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Sulphur Chemistry in KOH-SO2 Activation of Fluid Coke and Mercury Adsorption from Aqueous Solutions
The technical feasibility of producing sulphur-impregnated activated carbons (SIACs) from high-sulphur fluid coke by chemical activation was investigated. Using KOH and SO2, the activation process was able to produce SIACs with controllable specific surface area (SBET), pore size distribution and …
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Studies on the aerobic bacterial flora of a New Zealand tussock grassland soil
… of different techniques, nitrification and sulphur oxidation. Until very recently no information has been available on the bacteria inhabiting New Zealand soils and none on their activity in soil. It has been pointed out that little is known of the relative ability of many common bacteria to …
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Stabilization/solidification treatments for filter cake, a by-product of asphaltene gasification
… reagents such as Portland cement, fly ash, elemental sulphur, and CETCO Oilfield Service’s proprietary reagents to assess their efficacy at reducing leachable metals in Filter Cake. The CETCO reagents were the most effective treatment for reducing leachable nickel and vanadium in Filter …
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Development and application of time-temperature integrators to thermal food processing
… it metabolises in boiling volcanic pools; with elemental sulphur readily available, in water of high salinity, and in a reducing atmosphere. The amylase it secretes is naturally thermostable and withstands a full thermal sterilisation process.
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Kinetics of the ferric sulphate leaching of sphalerite and sphalerite/pyrite mixtures : a study of the chemical leaching of base metal minerals under conditions similar to that of bio-leaching by thiobacilli
… oxidising ferrous iron to ferric iron and elemental sulphur, if formed, to sulphate. The literature showed that two types of model have been used to describe the ferric leaching of the sphalerite. The first type was a shrinking-particle model in which there action was described by first …
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Exploring the Functionality and Application of Cyclic Phosphazanes
… oxidation of P(III) to P(V) with peroxide, elemental sulphur, or selenium can be used to address this issue. Additionally, the host-guest chemistry of these macrocycles with anionic guests and transition metal complexes was studied. Secondly, a series of phenylene-diamino cyclodiphosphazanes …
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Investigation of alternative carbon sources for the biological treatment of synthetic sulphate-laden water and mine impacted water in a linear flow channel reactor
… it also has the potential to convert sulphate to elemental sulphur, touching on waste valorisation as sulphur is a value-added product. However, BSR systems require supplementation with organic carbon and are characterised as slow, while partial oxidation of sulphide is difficult to control in …
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An Electrochemical Study of the Oxidative Dissolution of Synthetic Nickel-Iron Sulphide Minerals in Aqueous Media
… leaching, pentlandite is oxidized directly to elemental sulphur, without the formation of any intermediate phases. The lack of formation of violarite indicates that the system is substantially perturbed from equilibrium due to slow solid state diffusion of metal atoms within the sulphur …
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Acid biodesulphurisation of coal discards using a heap leaching approach
… benign coal discards with potential value. The desulphurization process in heap bioleaching is sustained by microorganisms capable of oxidizing iron and sulphur. Iron oxidizers facilitate the regeneration of the leaching agent Fe3+ from Fe2+, while sulphur-oxidizing microorganisms produce …
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In-situ Wachstumsuntersuchungen beim reaktiven Anlassen von Cu, In Schichten in elementarem Schwefel
In dieser Arbeit wurde das reaktive Anlassen von dünnen Kupfer-Indium-Schichten in elementarem Schwefel mittels energiedispersiver Röntgenbeugung untersucht. Durch die simultane Aufnahme der Röntgenspektren und der Messung der diffusen Reflexion von Laserlicht der Wellenlänge 635 nm an der …
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Linking microbial community dynamics and performance of a biological sulphate reducing system using a mixed volatile fatty acid stream as electron donor
… non-SRB bacterial genera as well as known elemental sulphur reducing bacteria Desulfuromonas acetexigens and Dethiosulfovibrio acidaminovorans were also found to be present, with the latter being associated only with the lactate operated reactor. qPCR results indicated that despite being …